A gas at 65.0°C occupies 4.22 L. If the pressure remains the same, at which Celsius temperature will the volume be 3.87 L out to be 310 degrees
You can leave the pressure out of both sides of the equation since the pressure is constant to make it easy.
so all you have is volume over Temp = new volume over new temp which is we don't know.
4.22 liters over 338 Kelvin = 3.87 liters over T
cross multiply and solve for T which comes out to be 310 degrees K or 37 degrees C
Yes you are right it is 310
Learn more about volume https://brainly.com/question/1578538
#SPJ1
Question 1: (answer in place of item 15)
Use what you know about valence structure to predict how chlorine will bond with Silicon.
Extra Credit: What shape do you predict this molecule will take?
Question 2:(answer in place of item 16)
In a chemical reaction explain 2 things that are always the same on the reactant and product side and one thing that might change in the course of the reaction.
Question 3:(answer in place of item 17)
Use what you know about electronegativity to predict the relative strength of the bond between CaO (Calcium Oxide) and NiO (Nickel II Oxide).
Question 4:(answer in place of item 18)
Balance: NO + H2O → NH3 + O2
List the amounts of Nitrous Oxide, Water, Ammonia, and Oxygen in the balanced equation.
Question 5:(answer in place of item 19)
Titration reveals that 14.0 mL of 2.0 M sulfuric acid are required to neutralize the sodium hydroxide in 25.00 mL of NaOH solution. What is the molarity of the NaOH solution?
H2SO4(aq) + 2NaOH(aq) → 2H2O(l) + Na2SO4(aq)
1)The bond between silicon and chlorine will be covalent bond.
2) The mass and amount of atoms are same . bonds between atom will change.
3) the balanced reaction is :
4NO + 6H₂O ----> 4NH₃ + 5O₂
1) The valence electron in silicon is 4 and the valance electron in chlorine is 7 . there is not much difference in their electronegativity . so, they do not form ionic bond they will form covalent bond.
2) In a chemical reaction the 2 things that are always same is the amount of atoms and the mass . the one thing that will change is the bonding between the atoms.
3) the reaction is :
NO + H₂O ----> NH₃ + O₂
reactants products
N 1 1
O 2 2
H 2 3
hydrogen is not balanced . so multipy 3 in H₂O and 2 in NH₃ and 2 in NO 5/2 in O₂
2NO + 3H₂O ----> 2NH₃ + 5/2O₂
now the reaction is balance . to make it whole number multiply thae whole equation with 2, we get:
4NO + 6H₂O ----> 4NH₃ + 5O₂
Thus, 1)The bond between silicon and chlorine will be covalent bond.
2) The mass and amount of atoms are same . bonds between atom will change.
3) the balanced reaction is :
4NO + 6H₂O ----> 4NH₃ + 5O₂
To learn more about balanced reaction here
https://brainly.com/question/14280002
#SPJ1
a lab worker wishes to dilute 5.00 x 102 ml of 18.0 m hcl to a concentration of 0.25 m. what volume of distilled water (l) must they add to the initial solution to achieve this lower concentration?
The volume of distilled water they must add to the initial solution to achieve this lower concentration is 35.5 l.
Dilution is defined as the process in which the concentration of a sample is decreased by adding more solvent. The dilution formula is given below.
C₁V₁ = C₂V₂
where C₁ = initial concentration of sample = 18.0 m
V₁ = initial volume of sample = 5.00 x 10² ml
C₂ = final concentration after dilution = 0.25 m
V₂ = total final volume after dilution
Plug in the values to the formula and solve for the final volume.
C₁V₁ = C₂V₂
(18.0 m)(5.00 x 10² ml) = (0.25 m)V₂
V₂ = 36000 ml
Subtract the initial volume from the final volume to determine the volume of water needed to add.
V of water = V₂ - V₁
V of water = 36000 ml - 5.00 x 10² ml
V of water = 35500ml = 35.5 l
Learn more about dilution here: brainly.com/question/1615979
#SPJ4
given the rate at which human activity is increasing atmospheric carbon dioxide levels, why can't we expect the natural carbon dioxide cycle to prevent global warming?
the human activities like coal tar minings, foctory out let releasing the carbon gases out with out filtering, air polluting activities, over using personal vehicles for unnecessary activities, and many other reasons that are briefly explained below
what is global warming?
a steady rise in atmospheric temperature often attributed to the greenhouse effect brought on by higher quantities of carbon dioxide, chlorofluorocarbons, and other pollutants.
The quantity of carbon dioxide emitted by human activity each year is at least 60 times greater than that produced by volcanoes. Large, ferocious eruptions may, for a few hours, match the pace of human emissions, but they are too uncommon and brief to come close to the yearly emissions of humans. In fact, the annual carbon dioxide emissions from a few specific U.S. states exceed those of the planet's entire active volcanoes.
In 2015, around 40 billion metric tonnes of carbon dioxide were released into the atmosphere as a result of human activity, mostly the burning of coal and other fossil fuels, but also cement manufacture, deforestation, and other landscape changes. The Global Carbon Project estimates that since the beginning of the Industrial Revolution, human activities have contributed more than 2,000 billion metric tonnes of carbon dioxide to the atmosphere.
To learn more about global warming follow the given link: https://brainly.com/question/46993
#SPJ4
What compound is formed from Ca2+ and Cl1-
Answer:
You get CaCl2 (Calcium chloride)
Explanation:
Calcium has a +2 charge and chlorine has a -1 charge. You need the net ionic charge to equal zero so you need two chlorine atoms to have the +2 cancel out. You end up with CaCl2.
Find the coordinates of the midpoint of the segment given it's endpoints (-3, 7) and (3,-5)
Answer:
(0,1)
Explanation:
Endpoints (-3, 7) and (3,-5)
The midpoints will be the average of the x and y coordinates:
Midpoint for x = (-3+3)/2 = 0
Midpoint for y = (7-5)/2 = 1
(0,1)
17. in general, molecules and ions always follow the octet rule unless it is impossible. the three types of exceptions are molecules/ions with too few electrons, molecules/ions with an odd number of electrons, and molecules/ions with too many electrons. a. which atoms sometimes have fewer than 8 electrons around them? give an example. b. which atoms sometimes have more than 8 electrons around them? give some examples. c. why are odd- electron species generally very reactive and uncommon? give an example of an odd-electron molecule.
Boron and beryllium sometimes have less than 8 electrons around them, Sulphur sometimes has more than 8 electrons around it and odd electron species are reactive because of their instability and their examples ate NO, NO₂ and ClO₂.
a. The example of the atoms which sometimes have fewer than 8 electrons around them are Boron and beryllium.
b. The example of the atom with sometimes have more than 8 electrons around them is Sulphur.
c. The odd electrons species generally are very reactive and uncommon because there highly unstable.
To achieve stability the readily reacts with other compounds in order to complete their octet and achieves stability. They are very uncommon because when they are formed, they tend to break the octet rule which is not very frequently observed in the atoms. The example of odd electrons species are NO, NO₂ and ClO₂.
To know more about octet rule, visit,
https://brainly.com/question/865531
#SPJ4
50 POINTS
Which chemical formula most likely describes ozone?
O A. O
OB. 03
OC. 0₂
O D. 000
Answer:
B
Explanation:
Ozone (O3) is a gas which is present naturally within Earth's atmosphere. It is formed of three oxygen atoms (giving it the chemical formula, O3).
assume that after the first heating, your total mass of the crucible and contents is 1.76 g. after the second heating, the total mass is 1.77 g. what choice best describes what is happening with your reaction?
The total mass of the crucible and contents is 1.76g.It becomes 1.77g after the second heating. Here the decomposition reaction occurs.
Crucible is a metal container in which the substances are subjected to very high temperature.Decomposition reaction is the reaction in which a molecule breaks down to form two or more components. All decomposition reactions are the reverse of a combination of reactions.one of the product of decomposition must be in the elemental state.All decomposition reactions are not redox reactions. By heating a crucible and a content using intense gas flame,the mass of the content of the crucible will increase to some extent.so,the mass is increased from 1.76g to 1.77g.
To learn more about decomposition reaction please visit:
https://brainly.com/question/27300160
#SPJ4
the titration of a polyprotic acid with sufficiently different pka 's displays two equivalence points. why?
If Ka1 and Ka2 are sufficiently distinct and a polyprotic acid is titrated with a strong base, the pH curve will contain two equivalence points because the two acidic protons will be titrated sequentially.
What is titration?Titration is a method of chemical analysis in which the amount of a sample's constituents is determined by adding a precise amount of a different substance—one that the desired constituent reacts with in a specific, known proportion—to the sample being tested.
The titrating reagent, or titrant, is gradually added to the process using a standard solution (i.e., a solution of known concentration), which is administered using a burette, which is essentially a long, graduated measurement tube with a stopcock and a delivery tube at its bottom end. The addition comes to an end at the comparable point.
To know more about titration, visit:
https://brainly.com/question/2728613
#SPJ4
which of the following are non-conservative properties of a deep water mass? 1. temperature 2. dissolved gases (o2, co2) 3. salinity 4. nutrients (nitrate, phosphate, silica)
Option 4. nutrients (nitrate, phosphate, silica) are non-conservative properties of a deep water mass.
The non-conservative factors like phosphorous (P), iron (Fe), and carbon (C) or dissolved inorganic carbon found in seawater are chemically or biologically reactive. Conservative elements have longer residence instances. that is the purpose these factors make up the majority of the sea's dissolved materials.
Sodium and chloride are nonconservative constituents of seawater. Non-conservative pollutants approach pollutants that are presumed to be destroyed, biodegraded, chemically converted, or volatilized within the POTW to some diploma.
Learn more about non-conservative factors here:-https://brainly.com/question/26846829
#SPJ4
Which of the following elements is the LEAST reactive?
Fluorine, Rubidium, Cesium, and Gold
Answer:
The least reactive metals would be Platinum, Gold, Palladium, Osmium and Silver and in the decreasing order.
Of the following elements: Fluorine, Rubidium, Cesium, and Gold is the LEAST reactive:
Gold
an aqueous solution contains 0.331 m hydrocyanic acid. how many ml of 0.268 m potassium hydroxide would have to be added to 150 ml of this solution in order to prepare a buffer with a ph of 9.230?
564.930995917 ml of potassium hydroxide would have to be added .
What is pH ?
The pH of a food is a direct function of the free hydrogen ions present in that food. Acids in food release free hydrogen ions. Hydrogen ions give acidic foods their characteristic sour taste. Therefore, pH can be defined as a measure of free acid. More specifically, pH is defined as the negative logarithm of hydrogen ion concentration. The pH range is 0 to 14. The pH of pure water is exactly 7, so pH 7 is neutral. Values less than 7 are acidic. Values above 7 are basic or basic.
Foods are generally classified as “acidic foods” (low pH, pH 4.6 or less) or “weakly acidic foods” (high pH, pH 4.6 or higher). Safe food storage is determined by the pH of the food. Acidic foods such as fruit and pickles can be safely canned in a tin can with a hot water bath. A combination of acid and hot water (212°F) destroys perishable organisms such as mold and yeast. Proper cooking water canning processes are important to prevent the growth of acid-tolerant molds and yeasts that can lead to elevated pH levels. The pH of borderline foods such as figs and tomatoes can easily exceed 4.6, so lemon juice or citric acid should be added before canning with boiling water. Low-acid foods such as vegetables and meat should be processed in a pressure preserver for safety.
To know about the pH , click the link given ;
brainly.com/question/26424076
#SPJ4
a shorter, easier way to show chemical reactions, using symbols instead of words, is called a group of answer choices
A shorter, easier way to show chemical reactions, using symbols instead of words, is called a Chemical equation.
All the elements in chemistry have specific name and properties. Along with this, they all have a particular sign like Na for sodium, Ar for Argon and K for potassium.
Rather than writing the full name in words of the elements, we write only the symbols of the element along with the products and the reactants separated by using a arrow pointing towards products side.
For example,
Chemical reaction: Sodium hydroxide reacts with Hydrogen chloride to form Sodium chloride and water.
Chemical equation: NaOH + HCl → NaCl + H₂O.
So, as we can see from the example, the chemical equation is much more easier to understands and shorter.
To know more about chemical equation, visit,
https://brainly.com/question/26694427
#SPJ4
which group of elements, metals or nonmetals, will tend to form ions that are larger than their parent atom?
Metals will tend to form ions that are larger than their parent atom.
Do metals become smaller or larger when they become ions?
Metals frequently lose electrons, forming cations, which are positively charged ions. Non-metals frequently acquire electrons and produce anions, which are negatively charged ions.All metals are capable of cation formation and electron loss. Alkali and alkali earth metals (groups 1 and 2) form cations that get bigger as you move down the groups and atomic radii follow suit. The ionic radii of the cations do not vary significantly over time, starting in the d-block of the periodic table.To learn more about Metal ions, follow the link https://brainly.com/question/28642645
#SPJ4
18 in scientific notation
Move the decimal so there is a non-zero digit to the left of the decimal point. The number of decimals you move will be the exhibitor on the 1010. If the decimal has been moved to the right, the exponent will be negative. If the decimal has been moved to the left, the exponent will be positive.
[tex]1.8 \times 10 { }^{1} [/tex]
without tasting, smelling, or removing either layer from the container, how can you clearly determine which layer is the aqueous layer using just material found in a typical kitchen?
Add distilled water towards the funnel to quickly identify which layer is aqueous layer .
By adding distilled water in aqueous solution, the organic layer will be the one that decreases in size, while the aqueous layer must expand. The two layers could then be divided into their corresponding beakers.
Water inside the liquid state serves as the solvent in such an aqueous solution. In other words, water molecules surround and integrate solute (dissolved) ions as well as molecules into their web of bonds.
If it is challenging to determine in which the droplets travel, also keep note of the layers' volumes: the watery layer indicates whichever layer expands as more water is added.
To know more about aqueous layer
https://brainly.com/question/24108403
#SPJ4
the radioactive half-life of a material is the time for group of answer choices its decay rate to reduce to half. half of an original quantity of the material to decay. both of these neither of these
The radioactive half-life of a material is the time for both of these. Option C.
The half-life of a radioisotope is the time it takes for half of the radioisotope to decay. Certain radioisotopes have a constant half-life. It is unaffected by conditions and is independent of the initial amount of its isotope. Half-life is the time it takes for half of the radioactive atoms of a particular radionuclide to decay.
As a rule of thumb after 7 half-lives, the radiation dose is less than 1% of the original dose. The half-life is then determined from the basic definition of radioactivity as the product of the decay constant λ of the radionuclide and the number of radioactive atoms N present. Half-life is defined as The time required for half of an existing radioactive nucleus to decay. That's what it means to have a short half-life. Activity declines rapidly because many nuclei decay in a short time.
Learn more about The radioactive here:-https://brainly.com/question/2320811
#SPJ4
What type of solution contains more solute than would normally dissolve at that temperature?
Super saturated solution is a term used to describe a solution that contains more solute than the saturated solution at a particular temperature.
What kind of solution liquefies a substance more quickly?Your solution is referred to as unsaturated if you can continue to add solute while it still dissolves. Your solution is saturated when it can no longer dissolve any more solute at a particular temperature.
What sort of solution exceeds the maximum solute concentration?A solution that, under the same circumstances, contains more dissolved solute than a saturated solution is said to be supersaturated. The link between temperature and a substance's solubility is displayed by a solubility curve.
To know more about saturated solution visit:-
https://brainly.com/question/1851822
#SPJ1
The table shows the nature of the reactants and products formed in a certain type of chemical reaction. Nature of Reactants and Products Reactants Products Ionic compound + Ionic compound Ionic compound + Ionic compound Which of the following is true about this type of chemical reaction? Question 5 options: It is a single replacement reaction, and all four compounds are different. It is a double replacement reaction, and all four compounds are different. It is a single replacement reaction, and each compound has the same set of ions. It is a double replacement reaction, and each compound has the same set of ions.
Based o the nature of the reactants and products:
It is a double replacement reaction, and all four compounds are different; option B is correctWhat is the chemical reaction?A chemical reaction is a reaction that results in changes in the chemical properties of substances.
A chemical reaction results in the formation of new products.
There are several types of chemical reactions such as:
Single replacement reactions - this is a type of reaction in which one element replaces the radical in another chemical compound.This is illustrated as follows: AB + C ---> AC + B
Double replacement reactions - this is a type of reaction in which the negative radicals in two chemical compounds are exchanged between the metallic or positive radicals in each chemical compound.This is illustrated as follows: AB + CD ---> AC + BD
Hence, two ionic compounds react to produce two iob=nic compounds.
Learn more about double replacement reactions at: https://brainly.com/question/23918356
#SPJ1
studocu serine proteases make use of which strategy among the four general strategies for catalysis? a.catalysis by approximation b. non-covalent c.covalent d. metal ion
The serine proteases use combination of the given strategies catalysis by approximation, non-covalent, covalent and metal ion
Serine proteases catalyze non-covalent bond is a sort of chemical link, generally between macromolecules, that doesn't entail the exchanging of electron pairs but instead involves more diffused types of electromagnetic interactions. In supermolecular chemistry, non-covalent bonds between supermolecules predominate over other types of bonds. The exchange of one or more pairs of electrons between two atoms forms a covalent connection. The two atomic nuclei are drawing these electrons in unison. When there is insufficient space between two atoms' electronegativities for an electron transfer to take place and create ions, a covalent bond is formed.
Learn more about covalent here:
https://brainly.com/question/19382448
#SPJ4
a buffer is formed by adding 1.0 mol of methylamine, ch3nh2, and 1.0 mol of methylammonium, ch3nh3 , in a 1.0 l container. if a 10.0 ml sample of this buffer is diluted to 1000 ml with water, what is the ph of the diluted buffer? for methylamine, kb
If a 10.0 ml sample of this buffer is diluted to 1000 ml with water,the ph of the diluted buffer is 9.26.
pH of Buffer Solution can be calculated as :
pH = pKa - log ( [ Salt ] / [ Base ] )
Since Kb = 1.8 x 10-5
then , pKb = 4.74
Since , pKa + pKb = 14 \Rightarrow pKa = 9.26
Initial concentration of NH3 and (NH4)+ is 1 M.
Now 10 mL of the sample is taken and diluted to 1000 mL
Since , M1V1 = M2V2
Where M1 is the Molarity of the solution before dilution and V1 is the volume taken ( M1 = 1 M ; V1 = 10 mL)
M2 is the Molarity of the solution after dilution and V2 ( V2 =1000 mL ) is the Final volume of the solution.
M2 = M1V1 / V2 \Rightarrow M2 = ( 1 x 10 ) / 1000 = 0.01 M .
Final concentration of NH3 and (NH4)+ in the sample is 0.01 M.
then , [ Salt ] / [ Base ] = 1
Since , log( 1 ) =0
Then pH = pKa = 9.26
The pH of the Buffer solution is 9.26.
Learn more about Buffer here:
https://brainly.com/question/22821585
#SPJ4
Rubbing alcohol has a density of approximately .79 g/mL
Baby oil has a density of approximately
.83 g/mL
Would rubbing alcohol float on top of or sink underneath the baby oil?
Since the density of rubbing alcohol is lower than the density of baby oil, rubbing alcohol will float on top of the baby oil.
What is density?The density of a substance is the ratio of the mass of the substance and its volume. It is mathematically expressed as:
Density = mass/volume
It is the property that measures how densely packed the molecules of a substance are.
The density of water is approximately 1 g/mL. Substances whose densities are lower than that of water will float on while those whose densities are higher than that of water will sink in it.
Two immiscible liquid substances will either float over or sink under one another depending on their densities. The liquid with the lower density will float while the one with the higher density will sink.
Thus, if the density of rubbing alchohol is 0.79 g/mL and that of baby oil is 0.83 g/mL, it means that the rubbing alcohol will float over the baby oil.
More on density can be found here: https://brainly.com/question/15164682
#SPJ1
what is the mass percent (m/m), of a solution prepared from 50.0 g nacl and 150.0 g of water? what is the mass percent (m/m), of a solution prepared from 50.0 g nacl and 150.0 g of water? 25.0% 40.0% 3.00% 0.250% 33.3%
The correct answer is 25%. Option A.
Solution:
mass of NaCl (solute) = 50 g
mass of H2O (solvent) = 150 g
Mass of solution = mass of solute + mass of solvent
= (50 + 150) g
= 200 g
Concentration of mass% (m/m) = (mass of solute / mass of solution) x 100 %
= (50/200) x 100 %
= (0.25) x 100 %
= 25.0%
Therefore answer is 25.0% (m/m)
The mass percentage is calculated by dividing the mass of one component by the total mass of the mixture and multiplying by 100%. A mole fraction is a unit of concentration defined as the number of moles of a component divided by the total number of moles in the solution. Solution mass percent is defined as the mass of solute present per 100 grams of solution.
Learn more about mass percentage here:-https://brainly.com/question/26150306
#SPJ4
Why does a pot of water start to steam after it boils?
the heat of the water
Explanation:
water heat boils and starts to mske water vapor.
what are the formulas of the compounds that correspond to the names given in the following table? compound name formula carbon tetrabromide cobalt(ii) phosphate magnesium chloride nickel(ii) acetate calcium nitrate
the formulas of the compounds that correspond to the names carbon tetrabromide cobalt(ii) CBr4 co(ii), calcium nitrate Ca(NO3)2(H2O)x.
Tetrabromoethane, commonly called carbon tetrabromide or CBr4, is a kind of carbon tetrabromide. It is used as a sedative, an intermediate in the production of agrochemicals, a solvent for greases, waxes, and oils, and in the blowing and vulcanization processes in the plastic and rubber industries. It is a component of compounds that are fire-resistant since it is not flammable. Because of its high density, it is also employed in the separation of minerals. An inorganic substance having the formula Ca(NO3)2(H2O)x is calcium nitrate, popularly known as norgessalpeter (Norwegian Salpeter). The infrequently encountered anhydrous chemical turns into the tetrahydrate by absorbing moisture from the atmosphere. Salts come in both colorless anhydrous and hydrated forms. There are other uses for calcium nitrate besides being a component of fertilizers.
Learn more about calcium nitrate here:
https://brainly.com/question/15289741
#SPJ4
A heat engine operates between a source at 477°c and a sink at 25°c. If heat is supplied to the heat engine at a steady rate of 65,000 kj/min, determine the maximum power output of this heat engine.
The maximum power output of this heat engine is 39,165.75 kJ/min. The result is obtained by using the value of Carnot Efficiency.
What is Carnot Efficiency?The efficiency of a heat engine is generally expressed as
[tex]\eta = \frac{W}{Q_{h}}[/tex]
Where
W = work output (J)Qh = heat energy input (J)The Carnot Efficiency is the maximum efficiency of heat engine that is dependent on the temperatures of the hot source (Th) and the cold sink (Tc). The Carnot Efficiency can be expressed as
[tex]\eta = 1 - \frac{T_{c} }{T_{h}}[/tex]
Where
Tc = temperature of the cold sink (K)Th = temperature of the hot source (K)Given the temperature of the hot source at 477°C and the cold sink at 25°C. The heat is supplied at a steady rate of 65,000 kJ/min.
What is maximum power output of this heat engine?
First, we convert temperature unit from Celsius to Kelvin.
[tex]T_{h} = 477 + 273.15 = 750.15 K[/tex]
[tex]T_{c} = 25 + 273.15 = 298.15 K[/tex]
The Carnot Efficiency is
[tex]\eta = 1 - \frac{T_{c} }{T_{h}}[/tex]
[tex]\eta = 1 - \frac{298.15 }{750.15}[/tex]
[tex]\eta = 1 - 0.39745[/tex]
[tex]\eta = 0.60255[/tex]
The power equals work divided by time. By using the value of Carnot efficiency, the maximum power output is
[tex]\eta = \frac{\frac{W}{t} }{\frac{Q_{h}}{t} }[/tex]
[tex]0.60255 = \frac{\frac{W}{t} }{65.000}[/tex]
[tex]\frac{W}{t} = 65.000 \times 0.60255[/tex]
[tex]\frac{W}{t} = 39,165.75 kJ/min[/tex]
Hence, the maximum power output of this heat engine is 39,165.75 kJ/min.
Learn more about Carnot Efficiency here:
brainly.com/question/15024126
#SPJ4
find the molality of the solution if 42 grams of potassium chloride (kcl) are dissolved in 3.6 kg of water.
When 42 grams of potassium chloride (kcl) are dissolved in 3.6 kilogram of water, the resulting solution has a molality of 0.156 m.
Describe molality.The term "molal concentration" is another word for molality. It measures the solute concentration in a solution. There are a variety of terminology that can be used to describe a solution's concentration, including molarity, molality, normality, formality, volume percentage, weight percentage, and parts per million. The term must determine the molecular weight of the solute and the mass of the solvent.
Molality is the best method for transferring concentration since the mass of the solute and solvent in the solution is constant.
Molality = moles of solute/ liters of solution
Moles of KCl = (42g KCl) x (1 mole KCl/74.5513 g) = 0.5633 moles KCl
Water in kg = 3.6 kg
m = 0.5633/3.6
m = 0.156
To know more about molality, visit:
https://brainly.com/question/26921570
#SPJ4
explain how nutrition hormones and exercise affect bone development and growth
Answer:
Explanation:
Numerous, controlled studies have demonstrated that people who exercise regularly have greater bone density than those who are more sedentary.
Any type of exercise will stimulate the deposition of more bone tissue, but resistance training has a greater effect than cardiovascular activities.
Hope this helps
Which model is useful in showing the reactivity of potassium?
Neither model is able to show the reactivity of potassium.
Model 1 because it shows an electron in the 4s orbital.
Model 2 because it shows an electron in the outermost ring.
Both models because each shows an electron in the outermost shell.
Both models are useful to describe the reactvity of potassium because each shows an electron in the outermost shell.
What are the valence electrons?Valence electrons can be described as the s and p electrons in the outermost shell while the electrons present in the inner shell are called core electrons.
Valence electrons can be all arranged in different shells and are negatively charged particles. These electrons are responsible for chemical interaction between atoms and the formation of chemical bonds.
Only the electrons present in the outermost shell can contribute in the formation of a chemical bond and decide the reactvity of atom such type of electrons is called valence electrons.
The reactivity in potassium can be seen due to one electron present in the valence shell.
Learn more about valence electron, here:
https://brainly.com/question/13993867
#SPJ1
what is tyhe molarity of a solutionm containing 104.2 grams of bacl2 in enough water to make 800 ml of solution
The molarity of a solution containing 104.2 grams of BaCl2 in enough water to make 800 ml of solution is 0.625mol/L.
What is molarity?
Molarity is one of the measures of the concentration in terms of the number of moles of the solute dissolved in particular volume of the solution.
Molarity of BaCl2 can be calculated by,
Molecular mass of BaCl2 is 208.23gmol^-1
Number of moles = mass / molecular mass = 104.2g / 208.23gmol^-1 = 0.50mol.
Molarity = Number of moles / volume = 0.50mol / 0.8L = 0.625mol/L.
Therefore, molarity of a solution containing 104.2 grams of BaCl2 in enough water to make 800 ml of solution is 0.625mol/L.
To learn more about molarity click on the given link https://brainly.com/question/17138838
#SPJ4