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3 years ago

Such as water or oxygen, All of the matter in a what is the same?

Chemistry

1 answer:

viva [34]3 years ago

8 0

Answer:

A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.

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A 12.0 wt% solution of CaCl2 (110.98 g/mol) has a density of 1.107 g/mL.

mariarad [96]

Answer:

a) Mass of solution is 16,605 milli grams.

b) 57.29 grams is the mass of calcium chloride in 431.3 mL of a 12.0 wt% solution.

c) 1.1967 mol/L is the formal concentration of calcium chloride in 431.3 mL solution.

Explanation:

Mass by mass percentage of calcium chloride solution, wt% = 12.0%

Density of the solution = d = 1.107 g/mL

a) Volume of the solution , V= 15.0 mL

Mass of the solution = m

$Mass=density\times Volume$

$m=d\times V=1.107 g/ml\times 15.0 mL=16.605 g$

Mass of solution = 16.605 g = 16,605 mg (1g = 1000 mg)

b) Mass of the solution = m

Volume of the solution = V = 431.3 mL

$Mass=density\times Volume$

$m=d\times V=1.107 g/ml\times 431.3 mL=477.4491 g$

Mass of calcium chloride = x

w% = 12.0%

$\frac{x}{M}\times 100=12\%$

$x=12\times \frac{M}{100}=12\times \frac{477.4491 g}{100}=57.29 g$

57.29 grams is the mass of calcium chloride in 431.3 mL of a 12.0 wt% solution.

c) Moles of calcium chloride = $\frac{57.99 g}{111 g/mol}=0.5161 mol$

$Molarity(M)=\frac{moles(n)}{V(L)}$

V = Volume of the solution in Liters

n = 0.5161 mole

V = 431.3 mL = 0.4313 L

$M=\frac{0.5161 mol}{0.4313 L}=1.1967 mol/L$

1.1967 mol/L is the formal concentration of calcium chloride in 431.3 mL solution.

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