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3 years ago

For many purposes we can treat nitrogen as an ideal gas at temperatures above its boiling point of - 196.°C.

Chemistry

2 answers:

Slav-nsk [51]3 years ago

4 0

Answer:

Explanation:

P1V1=n1RT1

P2V2=n2RT2

n1=n2 R=R

Divide equals and get

P1V1T2=P2V2T1

V2 =V1 (P1/P2)(T2/T1)

V2 will reduce by 10% due to pressure

V2 will increase by 184K/175K or 5%

therefor overall V will decrease

about 5%

Pavel [41]3 years ago

3 0

Answer: the volume of the sample decreased

Explanation:

T1 = -98°C = - 98 + 273 = 175K

T2 = -89°C = -89 +273 = 184K

P1 = P

P2 = 110%P = 1.1P

V1 = V

V2 =?

P1V1/T1 = P2V2/T2

PxV/175 = 1.1PxV2/184

175x1.1PxV2 = PVx 184

V2 = (PVx 184) /(175x1.1P)

V2 = 0.96V = 96%V

Therefore, the final volume is 96% of the initial volume. This means that the final volume decreased by 96%

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About 6 × 109 g of gold is thought to be dissolved in the oceans of the world. If the total volume of the oceans is 1.5 × 1021 L

Lelechka [254]

First, determine the number of moles of gold.

Number of moles = $\frac{given mass in g}{molar mass}$

Given mass of gold = $6 \times 10^{9} g$

Molar mass of gold = 196.97 g/mol

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Number of moles of gold = $\frac{6 \times 10^{9} g}{196.97 g/mol}$

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Molarity = $\frac{3.046\times 10^{7} moles}{1.5 \times 10^{21} L}$

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