what is the net ionic equation for the reaction of solid barium carbonate with an aqueous solution of hydrochloric acid?

Answer:

Explanation:

Atoms emit light because excited electrons are returning to lower energy states, emitting the energy difference :- Bohr model. This energy always has a specific wavelength because the electrons can only exist in set orbits.

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Answer:Anaxonic Neurons

Explanation:

Answer:

nothing common dude

With density 1.00 g/ml and a specific heat of 4.184 j/g we can see that the heat of the chemical reaction in joules is H = 1,596 J

We are given

Total volume of the mixture = 70.6 ml

Change in temperature = 6.1 °C

Density of reaction mixture =  1.00 g/ml

Specific heat of water =  4.184 J/g = 4200 J/Kg

Now Density = mass/volume

Mass of water = Density × volume

Mass of water =  1 g/mL × 62.3 mL

Now in order to find heat in joules, let's use the formula.

H = mcθ

m = mass of water

c = heat capacity of water

θ = temperature rise

Now substituting the values we get

H = 0.0623 Kg × 4200 J/Kg × 6.1 °C

H = 1,596 J = 1.5 KJ

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The molecular formula of acetic acid is C[tex]_2[/tex]H[tex]_4[/tex]O[tex]_2[/tex].

In 100 g of sample of acetic acid,

the concentration of Carbon (C) is 40 g,

the concentration of Hydrogen (H) is 6.714 g,

the concentration of Oxygen (O) is 53.29 g

To calculate the no. of moles, mass is divided by molar mass.

Therefore, no. of moles of C = 40/12 = 3.33

No. of moles of H = 6.714/1 = 6.71

No. of moles of O = 53.29/16 = 3.33

As the ratio of the elements is 1C : 2H : 1O, thus, empirical formula is      CH[tex]_2[/tex]O

The molecular mass of the empirical formula CH[tex]_2[/tex]O is 12 + 1(2) + 16 = 30g/mol. Since the molar mass of acetic acid is 60.05 g/mol and the molecular mass of the empirical formula was found to be 30 g/mol, the subscripts of the empirical formula are multiplied by (60.05/30) 2, to get the molecular formula. Thus the molecular mass of acetic acid will be     C[tex]_2[/tex]H[tex]_4[/tex]O[tex]_2[/tex]

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we need these set of reactions that goes from ammonia to nitric acid.

1) 4NH3(g)+5O2(g)-->4NO(g)+6H2O(g)

2) 2NO(g)+O2(g)-->2NO2(g)

3) 3NO2(g)+H2O(l)-->2HNO3(aq)+NO(g)

State the ratio of moles of HNO3 to NH3:

4 moles of NH3 produce 4 moles of NO,

4 moles of NO produce 4 moles of NO2

4 moles of NO2 produce 4 * (2 / 3) moles of HNO3 = 8/3 moles of HNO3.

=> (8/3) moles HNO3 : 4 moles NH3

Calculate the number of moles of HNO3 in 10000 l of 0.7500 M solution

M = n / V => n = M * V = 0.7500 M * 10000 liter = 7500 moles HNO3

Use proportions:

(8/3) moles HNO3 / 4 moles NH3 = 126 moles HNO3 / x

=> x = 7500 moles HNO3 * 4 moles NH3 / (8/3 moles HNO3) = 11279 moles NH3

Convert moles to grams:

molar mass NH3 = 14 g/mol + 3 * 1g/mol = 17 g/mol

mass in grams = number of moles * molar mass = 11279 moles * 17 g/mol = 191743  g

Answer: 191743 g.

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Chemists employ the mole, a very significant unit of measurement. The initial SO3 concentration is 0.28 M.

A mole is defined as 6.02214076 1023 of a particular chemical unit, such as atoms, molecules, ions, or others. Because there are so many atoms, molecules, or other components in any compound, the mole is a useful quantity to utilize.

When an element's standard relative atomic mass is multiplied by the molar mass constant, 1 103 kg/mol = 1 g/mol, the result is the molar mass of its atoms.

An object's mass that comprises 6.023 x 1023 of that object's particles is referred to as a mole. The SI unit used to measure substance amounts is the mole. Molecule is its symbol. According to the definition, 1 mole of carbon-12 weighs 12 grams and has a carbon atom count of 6.022140857 x 1023.

2.50 L is the container's volume.

Initially, there were 0.700 moles.

first concentration of SO3 =0.700 moles /2.50 L

SO3 = 0.28 M

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984 kpa is the absolute pressure of gas cylinder when full.

101 kpa is the absolute pressure of gas cylinder when it’s empty.

Pressure is the force exerted on a particular surface area and we know that Absolute pressure is equal to the sum of gauge pressure and atmospheric pressure .Barometric pressure is the best example for absolute referenced pressure. Absolute pressure is measured in N/m² or pascal & kpa which is short for kilopascal

P(absolute)=P(gauge)+P(atm)

Here P(gauge) is pressure due to the contents present inside the cylinder

P(atm) is the pressure exerted by the atmosphere

=>883 kpa+101 kpa =984 kpa when full

Note that when the cylinder is empty the gauge pressure is zero as there is no substance to exert pressure So, only atmospheric pressure is exerted.

P(absolute)=0(because the cylinder is empty) + 101 kpa

Therefore P(absolute) =101 kpa when cylinder is empty.

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Answer:

fermentation of crops that are high in sugar (starch) or fat into ethanol,

Explanation:

PCL₅ is the empirical formula of the compound.

Phosphorous pentachloride is it's if empirical formula and molecular formula are assumed to be the same.

Empirical formula is the lowest relative ratios of atoms that are present in a molecule or compound. It shows the simplest ratio and not the actual number of atoms hence should not be confused with molecular formula.

quantity of phosphorus : 4.14g

quantity of white compound after combining with chlorine : 27.8g

therefore quantity of chlorine = 27.8g - 4.14g => 23.66g

Molecular weight of Phosphorus: 30.97g

Molecular weight of Chlorine: 35.45g

For no. of moles= given weight / molecular weight

Moles of phosphorus= 4.14g / 30.97 => 0.1337 moles

Moles of Chlorine= 23.66g / 35.45 => 0.6674 moles

For empirical formula, we divide with the smaller entity i.e. 0.1337

Phosphorus: 0.1337 / 0.1337 => 1

Chlorine: 0.6647 / 0.1337 => 5

hence the empirical formula is PCL₅

Name of the compound : Phosphorus pentachloride

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Answer:

An atom changes from a ground state to an excited state by taking on energy from its surroundings in a process called absorption. The electron absorbs the energy and jumps to a higher energy level. In the reverse process, emission, the electron returns to the ground state by releasing the extra energy it absorbed.

Answer:

A.

Explanation:

A probe was sent to record the event

You take in that you need to make a decision. Try to notice and define the nature of the decision you must make. This first step is very important.

Decision-making requires the identification and selection of alternatives on the basis of values, linking, requirements, and beliefs. To begin the procedure objectives must be defined, classified, and ordered in the order of their importance. Decision-making involves the recognition and selection of alternatives on the basis of values, preferences, concerns, and beliefs.  Decision-making means selecting a course of action from two or more alternative strategic decision-making (SOM) is of great and growing importance.

So we can conclude that attribute of Decision Making · It is a process of selecting a course of action from among the alternative courses of action.

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40.4 C

So far q(rxn) = q(water) + q(CaCl2) (136g)(4.184J/°Cg)(Tfinal - 25.0°C) = (125g)(4.184)(Tfinal - 25.0°c) + (11g)c(Tfinal - 25.0°C).

The specific heat capacity is measured in J/(kg K) or J/(kg °C), and it is the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature rises by 1 K (or 1 °C).The average kinetic energy of the atoms or molecules in the system is measured by temperatures. The zeroth law of thermodynamics states that when two objects are in thermal equilibrium, no heat is transferred between them, resulting in an equalisation of their temperatures.

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Option C. The character has a mass of 85. zero kg and weighs 305 N mercury is three.59 Venus is eight.87 Earth is 9. eighty-one mars three.77: C.earth

Earth is expected to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth looking for the oldest rocks to radiometrically date. In northwestern Canada, they determined rocks approximately four.03 billion years vintage.

The earliest existence on earth might have been just as purple as its miles green nowadays, a scientist claims. ancient microbes might have used a molecule other than chlorophyll to harness the solar rays, one which gave the organisms a violet hue. The third planet from the sun, Earth is the handiest region in the acknowledged universe shown to host existence. With a radius of 3,959 miles, Earth is the 5th largest planet in our sun machine, and it's the handiest one regarded as positive to have liquid water on its floor. Earth is also unique in phrases of monikers.

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The numerical coefficients in a balanced chemical process describe the species-mole ratio. This mole ratio is used to compare two species' chemical compositions.

Take into account the balanced reaction for ammonium perchlorate's breakdown:

2 → N₂ + Cl₂ + 4H₂O + 2O₂

We can see from the aforementioned reaction that the amount of ammonium perchlorate that will react and the amount of oxygen gas that will be created are equal. Using the molar mass of 117.49 g/mol to calculate the moles of ammonium perchlorate

moles NH₄ClO₄ = 4.4 g / (117.49 g/mol) = 0.03745 mol

moles O₂ = 0.03745 mol

The oxygen gas moles will then be converted to mass (molar mass = 32 g/mol).

mass O₂ = 0.03745 mol * 32 g/mol = 1.2 g.

Therefore, the mass of oxygen gas produced by the reaction of ammonium perchlorate is 1.2 grams.

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COMPLETE QUESTION:

Ammonium perchlorate, NH₄ClO₄, is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N₂, chlorine gas Cl₂, oxygen gas O₂, water H₂O, and a great deal of energy. What mass of oxygen gas is produced by the reaction of 4.4g of ammonium perchlorate?

the WASB has a slightly acidic equivalence point and SASB has a slightly basic equivalence point. This is because WASB has a higher concentration of hydronium ions than SASB.

Hydronium ions play an important role in acid-base reactions. It is the hydrogen ion that is released or taken up in the acid-base reaction. The higher the concentration of hydronium ions, the more acidic the solution. In an acid-base reaction, an acid donates a hydrogen ion to a base. Bases accept hydrogen ions. This creates new water molecules. The equivalence point is the point at which an acid and a base react with 1:1 ratio. At this point the solution is neutral. If the acid has a higher concentration of hydronium ions than the base, the equivalence point is slightly acidic. This is due to the presence of more hydronium ions than at the start of the reaction. If the base has a higher concentration of hydronium ions than the acid, the equivalence point is slightly basic.

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The frequency of electromagnetic waves with an energy of 9.89×10-18 J is 1.492 ×10^16 Hz.

What are electromagnetic waves?

These are the waves created due to the vibration caused between two fields, i.e., electric field and magnetic field.

In simple words, it originates from the oscillating magnetic and electric field.  The electromagnetic spectrum gives us a range of frequency, wavelength and Energies.

It is used to classify the electromagnetic waves and arrange them according to their order of frequencies and wavelength.

Frequency = Energy/ Planck's constant

f= E/h

h=6.626×10^-34 J s

⇒9.89×10^-18/6.626×10^-34

⇒1.492×10^16 Hz.

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The ideal distance between a doorknob and the the ground floor is 34 inches.

In a lay man language, a doorknob simply refers to the handle which is usually used to hold doors in order to open or close the door. Every door of a building regardless of its size or location in the building must have a knob to always hold it with .

However, from the task given above, a doorknob should be at least 34 inches from the floor under normal circumstances.

In conclusion, it can be deduced from the simple explanation above that a doorknob should be ideally 34 inches from the floor of the house or building.

Complete question:

What should be the ideal distance between the doorknob from the floor?

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The correct answer to the statement " when mountains and water combine, do you expect volcanos, trenches, mountain ranges, shallow or deep earthquakes " is yes, it does happen.

The simple reason why the activities in the task above results including volcanoes is simply because of the cracks opened in the floor of ocean when two different plate spreads. When this happens, it causes volcanoes to occur.

A volcano refers to a mountain with fragments of rocks.

So therefore, from the explanation given above, it can be deduced that activities like volcanoes erupt when the ocean combine with mountains.

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The distance that will be traveled by me on the US interstate system will be 403.3 km.

Distance is the total length between two points. Distance is the total movement of an object without any regard to direction. We can define distance as to how much ground an object has covered despite its starting or ending point.

To calculate the distance traveled;

d = Vt

Where;

d = Distance traveled by me

V = Maximum speed

t = Time

Given:

V = 121 km/h

t = 3 hours 20 minute = 10/3 hours

Substituting the values in the formula

d = 121×10/3

d = 403.3 km

In conclusion, the distance traveled by me will be 403.3 km.

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Answer:

a: 1.181grams of iodine are present in the sample of soluble iodide.

b: 76.44 percent iodine is the mass percentage of iodine when excess silver nitrate was added to precipitate all of the iodide ions

Explanation:

We know that when silver reacts with halides it forms precipitate, silver when reacts with iodine it forms a yellow coloured precipitate of silver iodide which is an inorganic compound soluble in water. One odd characteristic of silver iodide is that it is photosensitive and may form metallic/dark silver if exposed to light. One of the most renowned albeit controversial use of silver iodide is that it is used to generate rain through clouds

Ag+ (aqueous)+ I−(aqueous) →AgI(s) yellow precipitate

2.185g x  (1 mole of AgI / 234.77 AgI)  x (1 mole Iodine/1 mole AgI)  x (126g of Iodine/1 mole of I)

= 1.181g

b)Now, mass percentage can be obtained by using the following formula

mass percentage = mass of solute/mass of solution x 100

iodine mass percent = (mass of iodine/mass of soluble iodide) x 100

= (1.181/1.545) x 100 = 76.44 %

mass percentage is the mass of the element/solute divided by the mass of compound or solution ,then the result is multiplied to get the answer. It can be defined as the weight of solute in a particular weight of solution.

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A balloon filled with room temperature air and then put in a sunny place expands slightly due to a rise in temperature and this is because the molecules of air are moving faster.

Charles' law is an experimental gas law that describes how gases expand when heated. A modern statement of Charles' Law is that Kelvin temperature and volume are directly related if the pressure on a dry gas sample is held constant .

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When the mineral grains flatten and align in parallel bands, a type of metamorphic rock called gneiss is created. It is a rock with  mineral grains made up of a variety of minerals.

such as graphite and quartz. High pressure and heat are used to form it. One popular and often found category of metamorphic rock is gneiss. It is created by igneous or sedimentary rock formations that have undergone metamorphic processes at high temperatures and pressure. In contrast to schist, gneiss forms at higher temperatures and pressures.

Compounds found only in living things are typically not considered minerals according to geological definitions. But other mineral grains, like calcite, are frequently biogenic is classified as organic molecules (such as mellite ).

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The concentration of Cd⁺² is  8.8×10⁻⁶mol/lit.

When there is no tendency for reactant and product quantities to fluctuate, a chemical reaction is in equilibrium. It is up to us to decide which components of a chemical reaction are deemed reactants and which are products, as well as the direction in which we write about them.

Cd(OH)₂ → Cd⁺² +2OH⁻

                    ↓

                   1mg/lit

Mass of Cd⁺² ⇒ 1mg/L×1 lit

Mass of Cd⁺² ⇒ 10⁻³gm

Mole of Cd⁺² → 10⁻³/112.4g/mol

Mole of Cd⁺² → 0.0088×10⁻³

Volume of Cd⁺² → 1Lit

Concentration of Cd⁺² →0.0088×10⁻³/1

Concentration of Cd⁺² → 8.8×10⁻⁶mol/lit.

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partial pressure of n2o in the gas mixture was found to be 143.6 kPa

what is partial pressure?

Each gas that makes up a mixture of gases has a partial pressure, which represents the pressure that would exist if that gas alone had filled the complete volume of the initial mixture at the same temperature. According to Dalton's Law, the partial pressures of the individual gases make up the overall pressure of a perfect gas combination.

A gas's partial pressure is a gauge of its molecules' thermodynamic activity. However, unlike liquids or gas mixtures, gases behave differently depending on their partial pressures when dissolving, diffusing, and reacting. This characteristic of gases often holds true for gas chemical reactions in biology.

As per the data give

Moles (o2) = 2.83 mol

Moles (n2o) = 8.41 mol

Total pressure = 192 kPa

so the total number of moles should be calculated

Total No.of moles = no of moles in  o2  + no of moles in n2o = 2.83 + 8.41 = 11.24 mol

mole fraction for n2o

Mole fraction = moles  of compound/ Total moles

Mole fraction for n2o = 8.41 / 11.24 = 0.748

so now calculate the partial pressure of n2o

pn2o = 0.748 192 kPa

pn2o = 143.6 kPa

therefore the partial pressure of the n2o was 143.6 Kpa

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Answer:

reactivity, flammability,toxicity some more

Answer:

Answer 1/6

Explanation: