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3 years ago

How many molecules of carbon monoxide gas can be produced from 395 grams of oxygen gas ?

Chemistry

1 answer:

puteri [66]3 years ago

3 0

The answer for the following problem is mentioned below.

Therefore 148.125 × 10^-23 molecules of the cabon monoxide gas is produced.

Explanation:

Given:

mass of the oxygen gas = 395 grams

We know;

For the production of the carbon monoxide;

The equation is,

Before balancing the equation;

C + $O_{2}$ → CO

After balancing the equation;

2 C + $O_{2}$ → 2 CO

where,

C = carbon molecule

O = oxygen molecule

CO = carbon monoxide

For the equation,

32 grams of oxygen gas → 2 × 6.023 × 10^-23 molecules

395 grams of oxygen gas → ?

= $\frac{2*6.023*10^{-23}* 395}{32}$

= 148.125 × 10^-23 molecules of the carbon monoxide

Therefore 148.125 × 10^-23 molecules of the cabon monoxide gas is produced.

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How many atoms of gold (Au) are equal to 212g of gold?

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Given :

Mass of gold ( Au ) is 212 gram.

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$N = 1.076 \times 6.022\times 10^{23}\\\\N = 6.48 \times 10^{23}$

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3 years ago

What is the mass of arsenic that is contained in a 50.0 g sample if the concentration is 5 ppm?

faltersainse [42]

Answer: The mass of arsenic found in the sample is 0.25 mg

Explanation:

ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.

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$\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6$

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We are given:

Concentration of arsenic = 5 ppm

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Putting values in above equation, we get:

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3 years ago

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klio [65]

Answer:

0,13 moles of acid are produced

Explanation:

The reaction of the problem is:

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Based on the reaction, 1 mole of PCl₅ produces 6 moles of acid (5 moles of HCl + 1 mole of H₃PO₄).

The molecular mass of PCl₅ is:

1P = 30,97g/mol + 5Cl = 5×35,45g/mol = 208,24 g/mol

That means 4,5g of PCl₅ are:

4,5g PCl₅×(1mol / 208,24g) = 0,0216 moles of PCl₅. As 1 mole of PCl₅ produces 6 moles of acid, 0,0216 moles of PCl₅ produce:

0,0216 moles PCl₅ × (6 moles acid / mole of PCl₅) =

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I hope it helps!

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3 years ago