Calculate the number of moles in 3.01 x 10²² atoms of calcium.​

Answer:

7500 mmHg

Explanation:

From the question,

Applying Boyles Law,

PV = P'V'................ Equation 1

Where P = original pressure, P' = final pressure, V = Original Volume, V' = Final Volume.

make P' The subject of the equation

P' = PV/V'.............. Equation 2

Given: P = 650 cm³, P = 750 mmHg, V' = (650×10/100) = 65 cm³ (Reduced by 10 percent of it original volume)

Substitute these values into equation 2

P' = (650×750)/65

P' = 7500 mmHg

Answer: 1 molar NaOH contains 40 grams of NaOH per every liter of water

Explanation:

so 2 M NaOH contains twice that amount, ie. 80 grams per liter. Then, ine 250 ml of weater, there should be 80/4 = 20 grams of solid NaOH dissolved.

Water cannot dissolve all substances that are made from ionic bonds probably because some ionic bonds are too strong for the attractions of water molecules to pull them apart.

However, some ionic bonds formed from ions of elements are unable to be dissolved by water and this is probably attributed to the fact that those bonds are too strong to be pulled apart by water molecules.

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Answer:

Electrons

hope it helps

Answer:

two

Explanation:

Every observer would observe the same image location and every light ray would follow the law of reflection. Yet only two of these rays would be needed to determine the image location since it only requires two rays to find the intersection point.

pls name braainly :)

Answer: H2O

Explanation: pure H2O does not contain ions which could

Transfer charge. Other substances in water solution forms ions.

Answer:

4

Explanation:

water starts to boil into water vapor at 100'C. at this point, temperature becomes costant at 100'C as heat energy is used up by the particles to overcome the intermolecular forces between the molecules.

once the forces holding the particles together have been overcome, the temperature will start to rise again showing that all the liquid water has been converted into water vapor

Answer:

biomass is a plant of animal material used as fuel to produce electricity

Tidal power is energy harnessed by converting engery from tides

That's what I know so far and took notes on hope it helped:)

Answer:

Yes, you can

Explanation:

When you climb Mount Everest, you need lots of energy. The higher you climb, the more your appetite goes down. You will need as much energy as you can get.

Answer:

1c

Explanation:

Answer:

pH = 9.37

Explanation:

The reaction of HZ with NaOH occurs as follows:

HZ + NaOH → H₂O + Na⁺ + Z⁻

When the reaction is in the equivalence point, the moles added of HZ = Moles of NaOH.

At equivalence point, you will have in solution just NaZ that is in equilibrium with water as follows:

Z⁻(aq) + H₂O(l) ⇄ OH⁻(aq) + HZ(aq)

Where K of equilibrium is Kw / Ka = 1x10⁻¹⁴ / 2.4x10⁻⁶ = 4.17x10⁻⁹

And K is defined as:

K = 4.17x10⁻⁹ = [OH⁻] [HZ] / [Z⁻]

To solve this question we must find  [Z⁻] and as [OH⁻] and [HZ] comes from the same equilibrium, both are equal and we can find [OH⁻] in order to solve pH:

Moles NaOH added = Moles HZ:

0.010L * (0.39mol / L) = 3.9x10⁻³ moles HZ = Moles NaOH added

The volume of 0.200M NaOH must be:

3.9x10⁻³ moles * (1L / 0.200moles) = 0.0195L.

The moles of HZ = Moles Z⁻ after the reaction and the volume is 0.010L + 0.0195L = 0.0295L. Thus, [Z⁻] is:

[Z⁻] = 3.9x10⁻³ moles / 0.0295L

[Z⁻] = 0.132M

Replacing in K expression:

4.17x10⁻⁹ = [OH⁻] [HZ] / [Z⁻]

4.17x10⁻⁹ = [X] [X] / [0.132]

5.51x10⁻¹⁰ = X²

X = 2.35x10⁻⁵M = [OH⁻]

As pOH = -log [OH⁻]

pOH = 4.63

And pH is

pH = 14 -pOH

Answer: The concentration of hydrogen ions in the given solution is [tex]6.2 \times 10^{-4}[/tex].

Explanation:

Given : pH = 4.32

pH of a substance or solution is the negative logarithm of hydrogen ion concentration.

[tex]pH = - log [H^{+}][/tex]

Substitute the value into above formula as follows.

[tex]pH = - log [H^{+}]\\= - log (4.32)\\= 6.2 \times 10^{-4}[/tex]

Thus, we can conclude that the concentration of hydrogen ions in the given solution is [tex]6.2 \times 10^{-4}[/tex].

Answer:

20.7 g NH3

Explanation:

Convert to moles of N2:

(17.0 g N2) / (28.02 g/mol N2) = 0.607 moles N2

Convert to moles of NH3:

(0.607 moles N2)(2 moles NH3 / 1 mole N2) = 1.213 moles NH3

Convert to grams of NH3:

(1.213 moles NH3)(17.03 g/mol NH3) = 20.66 g NH3

Answer:

Find the length of side x in simplest radical form with a rational denominator.

Answer:

The answer is C

radioactive elements can decay into stable or unstable elements.

Answer:

when the electron moves from the first orbit to the third it gains energy  but when it jumps from a higher energy orbit to a lower the energy is being radiated. So whihever is the higher energy you know what it is.

Explanation:

Answer: So  ever is the higher energy you know what it is.

Explanation:

Number of moles

Explanation:

From the general formula of ideal gas equation it is seen that number of moles is present and absent in other gas equations

Answer:

1.Exhaust from farming machines pollutes the air

2.Cows give off methane gas that gets into the atmosphere

3.The land the farm was cleared away on effects other recosystems

Explanation:

Farming adversely affected the earth systems such as climate change, deforestation, biodiversity loss, irrigation problems, pollutants, soil degradation, and waste production.

Agriculture causes a number larger of environmental issues that cause environmental degradation such as climate change, deforestation, biodiversity loss, irrigation problems, pollutants, soil degradation, and waste production.

For example, exhaust from farming machines pollutes the air, Cows give off methane gas that gets into the atmosphere and the land the farm was cleared away on effects other ecosystems.

So we can conclude that farming adversely affected the earth systems such as climate change, deforestation, biodiversity loss, irrigation problems, pollutants, soil degradation, and waste production.

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Answer:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

Explanation:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

Answer:

energy

Explanation:

Answer:

In which part of a nuclear power plant does fission take place? A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system? An active solar system because sunlight shines on the pipes naturally.

Explanation:

Hope it helps

FOLLOW MY ACCOUNT PLS PLS

Answer:

In which part of a nuclear power plant does fission take place? A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system? An active solar system because sunlight shines on the pipes naturally.

Explanation:

Answer: D- making flexible eyeglass frames

Explanation: my powerful mind

Answer:

it improves the accuracy of the results

A balanced chemical equation is an equation in which the number of each element are equal on the reactant side as well as in product side.

for example: BaCl2 + K2SO4 → BaSO4 + 2KCl

reactant side product side

Chemical equation should be balanced because only a balanced equation tells us the relative quantities of different reactants and product involved in the reaction.

_______________________________

Answer:  11.02 moles of Ag can be formed.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} Cu=\frac{350.00g}{63.55g/mol}=5.51moles[/tex]

The balanced chemical equation is:

[tex]Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag[/tex]  

According to stoichiometry :

1 moles of [tex]Cu[/tex] produces =  2 moles of [tex]Ag[/tex]

Thus 5.51 moles of [tex]Cu[/tex] will produce=[tex]\frac{2}{1}\times 5.51=11.02moles[/tex]  of [tex]Ag[/tex]  

Thus 11.02 moles of Ag can be formed.

Answer:

#10. The answer for number 10 is filament

Answer:  The new volume is 53.3 ml

Explanation:

The combined gas equation is,

[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]

where,

[tex]P_1[/tex] = initial pressure of gas =  50.0 kPa

[tex]P_2[/tex] = final pressure of gas = 80.0 kPa

[tex]V_1[/tex] = initial volume of gas = 80.0 ml

[tex]V_2[/tex] = final volume of gas = ?

[tex]T_1[/tex] = initial temperature of gas = [tex]300K[/tex]

[tex]T_2[/tex] = final temperature of gas = [tex]320K[/tex]

Now put all the given values in the above equation, we get:

[tex]\frac{50.0\times 80.0}{300}=\frac{80.0\times V_2}{320}[/tex]

[tex]V_2=53.3ml[/tex]

The new volume is 53.3 ml

Answer:

91.28 g

Explanation:

The mass of C₃H₈ used is 91.08g

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Molecules of carbon dioxide = 3.75 × 10²⁴

We know that,

1 mole = 6.023 × 10²³ molecules

Moles of carbon dioxide = 3.75 × 10²⁴ ÷ 6.023 × 10²³

                                         = 6.226 moles

From the reaction, 3 moles of carbon dioxide is produced by 1 mole of C₃H₈.

So, 6.226 moles will be produced by (1 ÷ 3) × 6.226

                                          = 2.07 moles of C₃H₈

Mass of C₃H₈ = moles × molar mass

                      = 2.07 × 44

                     = 91.08g

Therefore, mass of C₃H₈ used is 91.08g

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