The number of moles are equal to 4.0 × 10²⁵ atoms of tungsten is 0.6624 moles.
Mole is the amount of substance that contain the element chemical units present in 12 g of carbon - 12.
given that :
number of present in atoms of tungsten = 4.0 × 10²⁵
1 mole contains = 6.022 × 10²³ atoms
therefore, 4.0 × 10²⁵ atom will contains :
number of moles = 4.0 × 10²⁵ / 6.022 × 10²³
number of moles = 0.6642 moles.
Thus, The number of moles are equal to 4.0 × 10²⁵ atoms of tungsten is 0.6624 moles.
To learn more about moles here
https://brainly.com/question/26416088
#SPJ1
4) the density of a liquid was determined by the automatic pipette method. a 100-ul automatic pipette was used. the liquid had a mass of 0.082 g. what was the density in grams per ml of the liquid?
Using the automatic pipette method, the density of the liquid is 0.82 g/ml.
Density, denoted by ρ, is the property of a substance which determines whether it will sink or float. It is the ratio between the mass of the substance and its volume. It can be calculated using the formula below.
ρ = m/v
where ρ = density
m = mass
v = volume
Given that a 100-μl automatic pipette was used, then the volume of the liquid is 100 μl.
1 µL = 0.001 mL
100 µL = 0.1 mL
Plug in the values and solve for the density of the liquid.
ρ = m/v
ρ = 0.082 g / 0.1 mL
ρ = 0.82 g/ml
Learn more about density here: brainly.com/question/6838128
#SPJ4
for the following reaction, 4.54 grams of hydrogen gas are allowed to react with with 8.84 grams of ethylene (c2h4). hydrogen (g) ethylene (c2h4) (g) ethane (c2h6) (g) what is the maximum amount of ethane (c2h6) that can be formed? grams
Maximum amount of ethane formed is 9.47660606 grams .
What is Chemical reaction ?
There are chemical reactions taking place all around us. Nothing could be further from the reality, despite the fact that we occasionally link chemical processes with the sterile surroundings of the test tube and the lab. A staggering, nearly incomprehensible variety of new substances and energy changes actually result from the enormous number of alterations that occur in our environment every second of every day.
Chemical reactions happen whether or not you want them to in nature, where they can be considerably less controlled than in a lab. They can also be more messier. Whether it be a forest fire that is blazing.
To know more about the chemical reaction ,click the link given ;
https://brainly.com/question/11231920
#SPJ4
The addition of 3. 15 g of ba(oh)2*8H2O to a solution of 1. 52 g of NH4SCN in 100 g of water in a calorimeter caused the temperature to fall by 3. 1 C. Assuming the specific heat of the solution and products is 4. 20 J/g C, calculate the approximate amount of heat absorbed by the reaction, which can be represented by the following equation:
A solution of 1.52 g of NH4SCN in 100 g of water in a calorimeter decreased in temperature by 3.1 °C when 3.15 g of Ba(OH)28H2O was added. Calculate the approximate amount of heat absorbed by the reaction using the following equation, assuming the specific heat of the solution and products is 4.20 J/g °C:
Ba(OH)2 + 8H2O + 2NH4SCN = 10H2O + Ba(SCN)2(aq), 2NH3(aq), and (l)
What is Absorbed ?A material in one state is transferred into another substance in a different state through the process of absorption in chemistry (e.g., gases being absorbed by a liquid or liquids being absorbed by a solid).
The process of absorption is how the blood takes in the byproducts of digestion so that it can supply the rest of the body. The mucous membrane allows for the passage of the digested materials into the blood or lymph during absorption. The following mechanisms allow for absorption. basic diffusion
To know more about Absorbed please click here ; https://brainly.com/question/8828503
#SPJ4
using a dot and cross diagram as electrons show the bonding in a molecule of oxygen(O2-2 atoms of oxygen, one as dots, one as crosses)
Answer:
attached is the answer, hope it helps!!
What does 2Na2O mean?
1. you suddenly notice you have forgotten to add boiling stones to your round bottomed distillation flask but the distillation is now in progress. what should you do? explain why.
Answer:
Boiling stones should never be added to a hot liquid because that would cause the liquid to boil very fiercely. Now that the distillation is already in progress, first you have to cool down the solution.
Explanation:
When you have forgotten to add boiling stones to your round bottomed distillation flask, but now the distillation is in progress. You should not add boiling stones to the hot liquid, because that can cause that hot liquid to boil fiercely. So, you have to cool down that liquid first and then add boiling stones.
But if you do not add boiling stones in this process, it produces hot spots, which causes splashing out. So, you have to cool down the solution/reaction and then reheat the solution after adding boiling stones.
Learn more about distillation from:
https://brainly.com/question/15946045
#SPJ4
why is it that carbon dioxide from carbonated beverages, pets, cattle, farm animals, and humans, yeast, dry ice, fireplaces, charcoal grills, campfires, wildfires, alcohol and ethanol is ok, and carbon dioxide from fossil fuel is bad?
The amount of carbon dioxide (CO2) released when burning fossil fuels is the primary factor in why fossil fuels are so destructive. The greenhouse effect and climate change are significantly impacted by the burning and release of CO2. Our planet warms because more CO2 in the atmosphere prevents sunlight from escaping back into space.
what are fossils?
A fossil is any preserved remnants, impression, or trace of any once-living organism from a previous geological epoch (from Classical Latin: fossilis, meaning "obtained by digging"). Bones, shells, exoskeletons, animal or microbe impressions in stone, items preserved in amber, hair, petrified wood, oil, coal, and DNA traces are a few examples.
The earth's natural mechanisms have controlled greenhouse gas output for millions of years. At a pretty constant rate, gases would be absorbed and released. Meanwhile, temperatures were kept at a level that allowed for the continuation of life on Earth. This is "a balancing act," according to the Environmental Protection Agency.As the Industrial Revolution got under way in the second part of the 1700s, humans began to alter the delicate balance. Since then, we have been continuously increasing the amount of greenhouse gases, particularly CO2, that are being injected into the atmosphere. These gases trap heat and cause global warming. Despite the fact that there are many greenhouse gases, some of which are more powerful than others, CO2 currently accounts for about 84 percent of all greenhouse gases produced by human activity, or about 30 billion tonnes annually.Although forestry and industrial operations also make significant contributions, the majority of this is caused by burning fossil fuels for transportation and power.
CO2 levels were at 270 parts per million before the Industrial Revolution (ppm). In 1960, CO2 concentrations were at 313 ppm.
To learn more about fossil fuels follow the given link: https://brainly.com/question/1382363
#SPJ4
Force, Motion, and Newton's Laws (8.6 A and C):Question 4
A force of 200 N is exerted on an object of mass 40 kg.
What is the acceleration?
Select one:
05 m/s²
05 N
05 m/s
05 m
When a force of 200 N is exerted on an object of mass 40kg, the acceleration is 05 m/s².
We know that, F = ma ... (i)
where F ⇒ Force
m ⇒ mass
a ⇒ acceleration
Given,
F = 200 N = 200 kg ms⁻²
m = 40 kg
By putting the values of F and m from the above question into equation (i), we get:
200 kg ms⁻² = 40 kg × a
a = 200 kg ms⁻² / 40kg
a = 5 ms⁻² or 5 m/s²
Hence, when a force of 200 N is exerted on an object of mass 40kg, the acceleration is 05 m/s².
To know more about acceleration:
brainly.com/question/25825478
If the hydrogen atom emits red, blue-green, blue, and violet light, how many energy levels does it have in the visible region of the spectrum?.
If the hydrogen atom emits red, blue-green, blue, and violet light, 4 energy levels do it have in the visible region of the spectrum. Therefore, option B is correct.
What is the electromagnetic spectrum?The term electromagnetic spectrum can be defined as the range of frequencies of electromagnetic radiation and their respective photon energies and wavelengths.
Therefore, the four colors red, blue-green, blue, and violet light emitted by a hydrogen atom, are of four energy levels in the visible region of the electromagnetic spectrum.
Thus, option B is correct.
To learn more about the electromagnetic spectrum, follow the link;
https://brainly.com/question/23727978
#SPJ1
Your question is incomplete, most probably your question was
If the hydrogen atom emits red, blue-green, blue, and violet light, how many energy levels does it have in the visible region of the spectrum?
A. 3
B. 4
C. 5
D. 6
calculate the ph of an aqueous solution that contains 0.293 m sodium sulfite and 0.236 m sodium hydrogen sulfite.
The pH of an aqueous solution is -0.7459
Let the total volume of the solution where both the mixture of aqueous solution of sodium sulfide and sodium hydrogen sulfite are present be V
no. of moles of H+ coming from Na2S,H20 = 18 * 0.293 * V
no. of moles of H+ coming from NaHS = 0.236 * V
Final concentration of H+ will be
Cf = (18 * 0.293 * V) + (0,23 * V) / V
Cf = 5.57
pH = - log [5.57]
pH = - 0.7459
Negative pH occurs when the molarity of hydrogen ions in a strong acid is greater than 1N (normality)
To know more about pH click here:
https://brainly.com/question/8834103
#SPJ4
Please help, I need the answer asap. Got a test on Monday!!
1. The bacterial cell shown is a prokaryotic cell.
2a. The similarities between prokaryotic and eukaryotic cells include:
they both have cell membranesthey both carry out the activities of lifethey both contain genetic material in the form of DNA2b. The differences between prokaryotic and eukaryotic cells include:
eukaryotic cells have membrane-bound organelles but prokaryotic cells do noteukaryotic cells have a membrane-bound nucleus but prokaryotic cells do notWhat are eukaryotic and prokaryotic cells?Eukaryotic cells are cells that possess a membrane-bound nucleus as well as membrane-bound cell organelles.
Eukaryotic cells are cells of higher organisms such as animals and plants.
Prokaryotic cells are cells that lack a membrane-bound nucleus as well as membrane-bound cell organelles.
Prokaryotic cells are cells of lower organisms such as bacteria.
Learn more about eukaryotic and prokaryotic cells at: https://brainly.com/question/15842891
#SPJ1
How does covalent bonding allow atoms in group 16 of the periodic table to satisfy the octet rule?
The covalent bonding allows atoms in group 16 of the periodic table to satisfy the octet rule is two share 2 electrons of another atom to complete 8 electrons.
According to octet rule , an atom loose , gain , or share electrons to complete their 8 valence electron and achieve stability. Covalent bond is formed when two electrons share their valence electrons to satisfy the octet rule. group 16 elements have 6 valence electrons and they need 2 electrons to complete their octet.
Thus, The covalent bonding allows atoms in group 16 of the periodic table to satisfy the octet rule is two share 2 electrons of another atom to complete 8 electrons.
To learn more about covalent bonding here
https://brainly.com/question/10777799
#SPJ1
How large a net force is required to accelerate a 2000-kg suv from rest with an acceleration of 0. 14 m/s2?.
A large net force of 280N is required to accelerate a 2000 kg suv from rest with an acceleration of 0.14m/s2 .
According to Newton’s 2nd law of motion, force is equal to the change in momentum per change in time.Acceleration of an object depends on the mass of the object and the amount of force applied.
Force=mass* acceleration
Here, mass is equal to 2000 kg and acceleration is equals to 0.14m/s/s.putting these values,
F= ma
F= 2000kg * 0.14 m/s2
= 280 kg m/s2
=280N
So, 280N of force is required.
To learn more about newton's 2nd law please visit:
https://brainly.com/question/25545050
#SPJ4
5. describe a process in which 2 substances that are mixed together can be separated from each other. would this be a physical change or a chemical change? provide an explanation for your answer.
When two compounds are combined and change into a third substance, this is referred to as a biochemical reaction (or chemical reaction). When two substances are combined, not all of them react chemically.
How does chemical change?When one chemical material changes into one or more others, as when iron rusts, this is referred to as a chemical transformation. Chemical reactions produce changes in the way that molecules and atoms are ordered, which leads to the formation of new substances with new properties.
Describe a chemical example:Examples for chemicals include the basic building blocks, such as zinc, nitrogen, and oxygen; combinations created from these building blocks, such as water, dioxide, or salt; and more complicated substances, such as the air you breathe, rainfall, a chicken, a car, etc.
To know more about chemical change visit:
https://brainly.com/question/23693316
#SPJ4
2. what would happen to the rf if you left the tlc plate in the chamber for too long after the solvent reached the top? how does this affect the accuracy and precision of the rf value? (level 1)
If the TLC plate are left in the chamber for too long after the solvent reached the top the [tex]R_{f}[/tex] value achieved from experimentation will be different than the expected [tex]R_{f}[/tex] .
What is [tex]R_{f}[/tex] value?The value [tex]R_{f}[/tex] is the ratio of the distance traveled by the solute to the distance traveled by the solvent. The term comes from chromatography when it was discovered that a particular component in a particular solvent always migrates the same distance under the same conditions.
In chromatography, the value of [tex]R_{f}[/tex] is the basic requirement of the experiment. It indicates whether the analyte (solute) prefers the stationary or mobile phase. For stationary and mobile phases, the [tex]R_{f}[/tex] value is used to determine polarity, relative mass, relative solubility, etc.
If the TLC plate is left in the development chamber for too long, solvent will flow to the top of the plate, causing unexpected migration of the chemicals coated on the silica plate. So the experimentally obtained value [tex]R_{f}[/tex] is different from the expected value
To know more about [tex]R_{f}[/tex] value visit:
https://brainly.com/question/14393432
#SPJ4
If one of the organ systems were removed or stopped functioning, how will it affect the health and activity of a person?
ammonia burns in the presence of a copper catalyst to form nitrogen gas. what is the enthalpy change to burn g of ammonia?
The given question is incomplete and the complete question is
Ammonia burns in the presence of a copper catalyst to form nitrogen gas. 4 NH3(g) + 3 O2(g) → 2 N2(g) + 6 H2O(g) ΔΗ = -1267 kJ What is the enthalpy change to burn 38.4 g of ammonia?
Ammonia burns in the presence of a copper catalyst to form nitrogen gas. 4 NH3(g) + 3 O2(g) → 2 N2(g) + 6 H2O(g) ΔΗ = -1267 kJ and the enthalpy change to burn 38.4 g of ammonia is
Ammonia means NH₃ is one of the most commonly produced industrial chemical
Here given data is
ΔΗ = -1267 kJ
And the balanced reaction is
4 NH₃(g) + 3O₂(g) → 2N₂(g) + 6H₂O(g)
We have to calculate enthalpy change to burn g of ammonia = ?
First calculate the moles corresponding to 38.4 g NH₃
The molar mass of NH₃ is 17.03 g/mol
38.4 g ×1mole/17.03 g/mol = 2.25 mol
Then calculate the enthalpy change to burn 2.25 mol of ammonia
And according to the thermochemical equation 1267 kJ are released per 4 mole of ammonia that react
2.25 mol×(-1267kJ/4 mol) = -713 kJ
Enthalpy change to burn 38.4 g of ammonia is -713 kJ
Know more about enthalpy change
https://brainly.com/question/24021820
#SPJ4
Assignment: Identifying Types of Reactions
35 Points
1. Combustion reaction
2. Single displacement reaction
3. Neutralization reaction
4. Synthesis reaction
5. Decomposition reaction
6. Synthesis reaction
Types of reactionsThere are different types of chemical reactions. The type of reaction that corresponds to each chemical equation as shown in the image respectively are:
Combustion reaction: where substances burn in oxygen. In this case, the substance is a hydrocarbon and the products are carbon dioxide and water.Single displacement reaction: where an atom displaces another atom from a compound. In this case, Ca is displacing Mg from [tex]Mg(NO_2)_3[/tex]Neutralization reaction: a reaction involving an acid and a base to yield salt and water. Here, KOH is the base while HBr is the acid. KBr is the salt that is formed.Synthesis reaction: a reaction in which two or more atoms or molecules of atoms come together to form a compound. In this case, Na and O are the atoms.Decomposition reaction: where a compound breaks down into two or more smaller compounds or atoms. Here, MgO decomposes to Mg and O.Synthesis reaction: K and Cl combine to form KCl.More on types of reactions can be found here: https://brainly.com/question/14203092
#SPJ1
while gdp was once a key cyclical indicator, its usefulness has declined substantially for all of the following reasons except which one?
While gdp was once a key cyclical indicator, its usefulness has declined substantially for all of following reasons except " Requires seasonal adjustments"
What is GDP?
It is the standard measure of value added created through the production of goods and services in a country during a certain period
The usefulness of GDP has declined except for following-
Requires seasonal adjustments
Because of seasonal adjustments, firms are able to predict the economic activity in the region and adjust their inventories,investments and production process accordingly.
Seasonal adjustment ensures that remaining movements in GDP, or any other economic series, better reflect true patterns in economic activity.
Thus the correct answer from above options is
" requires seasonal adjustments"
Learn more about GDP at
https://brainly.com/question/1152672
#SPJ4
note: complete question is
While GDP was once a key cyclical indicator, its usefulness has declined substantially for all of the following reasons except which one? Multiple Choice
lack of timelinessrequires seasonal adjustmentconstant revisions for decadescontains too much informationhow could you identify a pure metal if you have a balance, a graduated cylinder, and a table of densities for metals
You can find the mass and volume of the pure metal then compare the density with the table of densities to determine which metal.
Density is a term used to describe how tightly a substance is packed. It fits that criteria of mass per unit volume. Formula for Density or Density Symbol: D The formula is: = m/V where is the object's mass, m is its density, and V is its volume. The term "mass" is used to describe how much matter there is in a thing. Mass is often represented in kilogrammes (kg) or grammes (g) (kg). The most common units of mass measurement are kilogrammes (kg) and grammes (g). No matter where in the cosmos it is or how much gravitational force is exerted on it, mass is a measure of how much matter there is.
learn more about density here:
https://brainly.com/question/15164682
#SPJ4
a cylinder of o2(g) used in breathing by emphysema patients has aovlume of 3.00 l at a pressure of 10.0 atm. if the temperature of the cylinder is 28.0 c, what mass of oxygen is in the cylinder
The mass of oxygen present in the emphysema patients' cylinder is 19.64grams.
The ideal gas equation is given by,
PV = nRT
P is the pressure, V is the volume, n is the moles of the gas, R is the gas constant and T is the temperature of the gas.
Mole scan be written as,
Moles = mass/molar mass
Molar mass of oxygen is 16 g/mol.
Here, the volume of the gas is 3 L and the pressure of the gas is 10atm. The temperature of the gas is 298 degrees Kelvin.
Putting the values,
3 x 10 = mass/16 x 0.082 x 298
Mass = 3 x 10/298 x 16/0.082
Mass = 19.64 grams.
The mass of oxygen in the cylinder is 19.64 grams.
To know more about gas equation, visit,
https://brainly.com/question/20348074
#SPJ4
(don’t need to answer all the questions i just need help with these!)
1) how many grams of iron are produced when 450. grams of iron (III) oxide react?
2) how many grams of water will be produced when 0.0155 moles of hydrogen gas completely react with Iron (III) oxide?
3) How many moles of mercury (II) oxide are needed to produce 12 grams of mercury?
4) How many moles of oxygen gas will be produced from 0.03 mol mercury (II) oxide?
5) How many moles of AlPO4 are produced when 0.27 of K3PO4 were used?
6) What is the mass of K3PO4 are needed to produce 2.04 moles of KNO3?
Answer:
Explanation:
1) Fe2O3 + 3 H2 -----> 2 Fe + 3 H2O Number of moles of Iron (III)oxide = 450 g / 159.69 g/mol = 2.82 mole
2) 0.0155 moles of hydrogen gas
3) oxide needed to produce 125 of oxygen is7.8 moles
4) 216.5894
5) K3PO4 and KNO3
a solution containing a large concentration of dissolved ions can be classified as a(n) . a solution containing a large concentration of dissolved ions can be classified as a(n) . solvent weak solution electrolyte unsaturated solution suspension
An electrolyte is a solution containing a large concentration of dissolved ions.
A solution containing a large concentration of dissolved ions is called an electrolyte. It mainly consists of dissolved cations ,anions. Some of the most important and commonly discussed electrolytes are
Calcium which plays a pivotal role in bone health in the body and muscle contraction and relaxation.
Sodium, which is responsible for maintaining osmolarity and nerve impulse conduction, the lack of sodium ions in the body may lead to Hyponatremia.
Potassium is another important electrolyte which is responsible for normal heart function and skeletal growth.
Chloride ions which are in close coordination with sodium ions in the body help in maintenance of the body's blood pressure. It can be obtained from tomatoes, olives, etc.
The shortage of these electrolytes in the body can cause physiological problems like tiredness, lethargy, sleeplessness and improper growth in case of children. Hence it is crucial for us to include all the electrolytes in our diet and have foods that are rich in water and electrolytes to stay healthy and fresh.
To learn more about Electrolytes visit
https://brainly.com/question/28699046
#SPJ4
in the laboratory you dissolve 21.0 g of potassium phosphate in a volumetric flask and add water to a total volume of 375 ml. what is the molarity of the solution ? m. what is the concentration of the potassium cation ? m. what is the concentration of the phosphate anion ? m.
The molarity of the solution is 0.264 M.
Molarity is the quantity of a substance in a certain volume of solution. Molarity is defined as the moles of a solute in line with the liters of an answer. Molarity is likewise referred to as the molar attention of a solution.
calculation:-
mass = 21 g
the molar mass of potassium phosphate = 212 g
moles = mass/ molar mass
= 21 / 212
= 0.099
Volume = 375 ml =0.375 L
molarity = number of moles/volume in liter
= 0.099 / 0.375 L
= 0.264 M
Molar concentration is the degree of the concentration of a chemical species, especially of a solute in a solution, in terms of the amount of substance in step with the unit quantity of the answer. In chemistry, the maximum generally used unit for molarity is the number of moles per liter, having the unit image mol/L or mol/dm³ in SI unit.
Learn more about molarity here:-https://brainly.com/question/26873446
#SPJ4
hat is the chemical symbol for magnesium?
Mo
Mn
Mg
Md
Answer:
The chemical symbol for Magnesium is Mg
Explanation:
As you can see on the periodic table Magnesium is in group two and has the element symbol of Mg
Hope this helps, have a great day!
a bag containing 0 oc ice is much more effective in absorbing energy than one containing the same amount of 0 oc water. (a) how much heat transfer is necessary to raise the temperature of 0.800 kg of water from 0 oc to 30.0 oc? (b) how much heat transfer is required to first melt 0.800 kg of 0 oc ice and then raise its temperature?
a)100464 J is the heat necessary to raise the temperature of 0.800kg of water from 0°C to 30°C .
b)125847.2x10³ J is the heat required to first melt and then raise the temperature of ice from 0°C to 30°C .
a)The concept of heat transfer which is a part of thermal properties of fluids that deals with melting, evaporation and sublimation is a prominent topic of discussion for physicists and chemists across the world. This particular concept is thus applied to solve the given question by the formula
Q=ms(ΔT)
m=mass of water
s=specific heat of water=4186 J/kg or 4.186 cal/g
Specific heat of water is the heat required to raise the temperature of 1kg water by 1°C.
T=change in temperature
=0.800 x 4186 J/kg x (30°C-0°C)
=100464 J
b) For melting and raising temperature;
Q=mLf + ms(Δ)T
Here,Lf is latent heat of fusion which is the heat required to convert solid into liquid i.e. 334 kJ/kg .
=0.800kg x 334 kJ/kg x (30°C-0°C)
=125847.2 x 10³ J
To learn more about Heat transfer visit:
https://brainly.com/question/13433948
#SPJ4
the half-life of a radioactive substance is the amount of time required for half its mass to decay. the half-life of carbon-14 is 5730 years. what is the continuous annual decay rate of carbon-14? please type in the exact answer.
The continuous annual decay rate of carbon-14 is k = ln (0.5)/5730.
The 1/2-life of a radioactive isotope is the quantity of time it takes for one-1/2 of the radioactive isotope to decay. The half of-existence of a selected radioactive isotope is consistent; it's miles unaffected by using situations and is independent of the initial quantity of that isotope.
1/2-life (symbol t1⁄2) is the time required for an amount (of substance) to reduce to half of its initial price. The time period is commonly utilized in nuclear physics to explain how speedy volatile atoms undergo radioactive decay or how long strong atoms survive.
Calculation:-
The functions as an exponential decay function as
P(t)=P₀e^{kt}
given the half-life as 5730 years, that is the time taken to reduce the mass to half
P₀/2 =P₀e^{5730k}
1/2=e^{5730k}
taking the natural log,
5730k=ln (0.5)
we get the exact continuous decay rate as
k = ln (0.5)/5730
Learn more about radioactive substances here:-https://brainly.com/question/25750315
#SPJ4
which one of the following best describes the difference between molar mass and formula weight? a) formula weights are measured in grams per mole, while molar masses are measured in atomic mass units. b) a formula weight is the mass of one molecule or formula unit while a molar mass is the mass of one mole of molecules or formula units. c) molar masses only describe the mass of ionic compounds, while formula weights can describe any compound. d) there is no difference between molar masses and formula weights.
The following best describes the difference between molar mass and formula weight is a formula weight is the mass of one molecule or formula unit while molar mass is the mass of one mole of molecules or formula units.
A formula mass is the sum of all masses of atom present in empirical formula. molecular mass is the mass of one mole of molecule. formula weight base on empirical formula while molecular mass is depend on molecule.
Thus, The following best describes the difference between molar mass and formula weight is a formula weight is the mass of one molecule or formula unit while molar mass is the mass of one mole of molecules or formula units.
To learn more about formula weight and molar mass here
https://brainly.com/question/24727547
#SPJ4
an ionic compound is made of 30.9% of cu, 13.6% si, and 55.5% f. a.what is the empirical formula of the anhydrous salt? b.1.00 gram of this compound is subject to high moisture environment. the resulting hydrate weighs 1.53 grams. what is the formula of the hydrate?
Empirical formula of the anhydrous salt is CuSiF₆
The formula of the hydrate is CuSiF₆.6H₂O
What is empirical formula?The molecular formula of a compound is the simplest integer ratio of the atoms present in the compound. As a simple example of this concept, the empirical formula for sulfur monoxide (SO) is simply SO, as is the empirical formula for Di-sulfur dioxide S₂O₂
Consider mass of Cu = 30.9 g
mass of Si = 13.6 g
mass of F = 55.5 g
Now for empirical formula, let's calculate the moles of each element:
Moles of Cu = 30.9/63.5=.49 moles
Moles of Si = 13.6/28.0=.49 moles
Moles of F = 55.5/19=2.92 moles
As you can see the moles of Cu and Si are almost 6 times the moles of F, which result in the empirical formula of salt as; CuSiF₆
Now, for the formula of hydrate:
Moles of CuSiF₆ = 1/205.62
= 0 .00486 moles
weight of H₂O = 1.53-1
= 0.53 g
Moles of H₂O = .53/18
= 0.029 moles
CuSiF₆ : H₂O = 0.00486 : 0.029
= 0.029/0.00486
= 1:6
So the molecular formula of hydrate is CuSiF₆.6H₂O
To know more about empirical formula visit:
https://brainly.com/question/14044066
#SPJ4
what is the molarity of a solution that contains 50.0 grams of sodium hydroxide, naoh, in 855 ml of solution?