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3 years ago

How many atoms of Ba would be equal to 11.3 g of Ba?

Chemistry

1 answer:

matrenka [14]3 years ago

4 0

Answer:

4.96 x 10²²atoms

Explanation:

Given parameters

Mass of Ba = 11.3g

Unknown:

Number of atoms = ?

Solution:

To solve this problem, we need to find the number of moles of Ba first and then the number of atoms it contains.

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

Molar mass of Ba = 137.3g/mol

Number of moles = $\frac{11.3}{137.3}$ = 0.08mole

1 mole of a substance contains 6.02 x 10²³ atoms

0.08 mole of Ba will contain 0.08 x 6.02 x 10²³ atoms = 4.96 x 10²²atoms

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A gas has a pressure of 8.5atm and occupies 24L at 25∘C. What volume (in liters) will the gas occupy if the pressure is increase

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From the question given above, the following data were obtained:

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Initial volume (V₁) = 24 L

Initial temperature (T₁) = 25 °C = 25 + 273 = 298 K

Final pressure (P₂) = 13.5 atm

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$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\\\frac{8.5 * 24}{298} = \frac{13.5 * V_{2}}{288}\\\\ \frac{204}{298} = \frac{13.5 * V_{2}}{288}\\\\$

Cross multiply

298 × 13.5 × V₂ = 204 × 288

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Learn more: brainly.com/question/25547148

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So Van't half vector i = π / (MRT)
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(1-X) X X

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