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3 years ago

a solution contains 2.1 moles of HCl and has a molarity of 6.00 M what volume of the solution occupy.

1 answer:

8 0

Use the formula C = n / V

We are given the moles, n = 2.1
And the molarity, C = 6

Rearrange the formula with V as the subject:

V = n / C

Sub in your values,

V = 2.1 / 6
= 0.35 L

Hope this helped! :)

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Five kilograms of liquid carbon tetrachloride undergo a mechanically reversible, isobaric change of state at 1 bar during which

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Answer:

Explanation:

From the information given:

Mass of carbon tetrachloride = 5 kg

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The given density for carbon tetrachloride = 1590 kg/m³

The specific heat of carbon tetrachloride = 0.84 kJ/kg K

From the composition, the initial volume of carbon tetrachloride will be: $= \dfrac{5 \ kg }{1590 \ kg/m^3}$

= 0.0031 m³

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Then:

The change in volume can be expressed as:

$\int ^{V_2}_{V_1} \dfrac{dV}{V} =\int ^{T_2}_{T_1} \beta dT$

$In ( \dfrac{V_2}{V_1}) = \beta (T_2-T_1)$

$V_2 = V_1 \times exp (\beta (T_2-T_1))$

$V_2 = 0.0031 \ m^3 \times exp (1.2 \times 10^{-3} \times 20)$

$V_2 = 0.003175 \ m^3$

However; the workdone = -PdV

$W = -1.01 \times 10^5 \ Pa \times ( 0.003175 m^3 - 0.0031 \ m^3)$

W = - 7.6 J

The heat energy Q = Δ h

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Q = 84 kJ

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ΔU = ΔQ + W

ΔU = 84 kJ + ( -7.6 × 10⁻³ kJ)

ΔU = 83.992 kJ

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3 years ago

What are the sign and magnitude of the charge of atom containing 14 protons, 15 neutrons, and 12 electrons?

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