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2 years ago

Which word describes a hypothetical gas that perfectly fits all the

Chemistry

1 answer:

loris [4]2 years ago

5 0

A hypothetical gas that perfectly fits all the

assumptions of the kinetic- molecular theory is Ideal gas.

(they actually don't exist)

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According to a label on a bottle of concentrated hydrochloric acid, the contents are 36.0% HCl by mass and have a density of 1.1

snow_lady [41]

Answer:

1) 11.64 mol/L is the molarity of concentrated HCl.

2) 135.40 mL of volume of 11.64 M will need to prepare 985 mL of 1.6 M HCl.

3) 1,711.08 grams of sodium bicarbonate would be needed to neutralize the spill HCl solution.

Explanation:

HCl solution with 36.0% HCl by mass, menas that in 100 g of solution 36.0 gram of HCl is present.

Mass of HCl= 36.0 g

Moles of HCl = $\frac{36.0 g}{36.5 g/mol}=0.9863 mol$

Mass of solution ,m= 100 g

Volume of solution = V = ?

Density of the solution ,d= 1.18 g/mL

$V=\frac{d}{M}=\frac{100 g}{1.18 g/mL}=84.75 mL=0.08475 L$

$Molarity=\frac{Moles }{\text{Volume of solution (L)}}$

Molarity of the solution :

$=\frac{0.9863 mol}{0.8475 L}=11.64 mol/L$

11.64 mol/L is the molarity of concentrated HCl.

$M_1V_1=M_2V_2$ ( Dilution equation)

$M_1= 11.64 M$

$V_1=?$

$M_2=1.6 M$

$V_2=985 mL$

$V_1=\frac{M_2V_2}{M_1}=\frac{1.6 M\times 985 mL}{11.64 M}$

$=135.40 mL$

135.40 mL of volume of 11.64 M will need to prepare 985 mL of 1.6 M HCl.

$NaHCO_3+HCl\rightarrow NaCl+H_2O+CO_2$

Concentration of HCl solution = 11.64 M

Volume of the HCl solution = 1.75 L

Moles of HCl in 1.75 L solution = n

$11.64 M=\frac{n}{1.75 L}$

$n=1.75 L\times 11.64 M=20.37 mol$

According to reaction 1 mole of HCl neutralized by 1 mole of sodium carbonate.

Then 20.37 moles of HCl will neutralized by ;

$\frac{1}{1}\times 20.37 mol=20.37 mol$ of sodium carbonate

Mass of 20.37 moles of sodium carbonate :

= 20.37 mol × 84g/mol = 1,711.08 g

1,711.08 grams of sodium bicarbonate would be needed to neutralize the spill HCl solution.

7 0

3 years ago

Hydrobromic acid dissolves solid iron according to the following reaction:

Alisiya [41]

Answer:

8.1g

0.1g

Explanation:

The reaction expression is given as:

Fe + 2HBr → FeBr₂ + H₂

Mass of pure iron given = 2.8g

A. Mass of HBr needed to dissolve a padlock of the mass;

To solve this problem, we need to use the mole concept.

Convert mass of the known iron to the number of moles.

Number of moles = $\frac{mass}{molar mass}$

Molar mass = 56g/mol

Number of moles of iron = $\frac{2.8}{56}$ = 0.05mole

1 mole of Fe will react with 2 mole of HBr

0.05mole of Fe will react with 0.05 x 2 = 0.1mole of HBr

Mass of HBr = number of moles x molar mass

Molar mass of HBr = 1 + 80 = 81g/mol

Mass of HBr = 0.1 x 81 = 8.1g

B. What mass of H2 would be produced by the complete reaction of the iron bar

Since:

1 mole of Fe will produce 2 mole of hydrogen gas

0.05mole of Fe will produce 2 x 0.05mole = 0.1mole of hydrogen gas

Mass of hydrogen gas = number of moles x molar mass

= 0.1 x 1

= 0.1g

4 0

2 years ago

Potrzebuje pomocy pilnie!! daję naj

Ymorist [56]

I dont speacka you languadge

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3 years ago

Ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Molodets [167]

Answer:

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10. The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 63 s for the gas to effus

ki77a [65]

Answer:

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Explanation:

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3 years ago