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IgorC [24]
3 years ago
8

One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?

Chemistry
1 answer:
gizmo_the_mogwai [7]3 years ago
6 0
27*9=243 if one mole is equal to 27 grams times that by 9
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Bismuth oxide reacts with carbon to form bismuth metal: bi2o3(s) + 3c(s) → 2bi(s) + 3co(g) when 689 g of bi2o3 reacts with exces
ExtremeBDS [4]
Using the answer from the first part, we know that 2.957 moles of bismuth have formed. Moreover, the molar ratio between bismuth and carbon monoxide is:

2 : 3

Using the method of ratios,

2 : 3
2.957 : CO

CO = (3 * 2.957) / 2
CO = 4.4355

4.436 moles of carbon monoxide will be formed
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3 years ago
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The RNA and DNA backbone differ because the DNA sugar is missing what element?
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Answer:

D.

Explanation:

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2 years ago
A wave has a frequency of 3,5MHz and a wavelength of 85,5 m. What is the wave velocity through
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Answer:

velocity = 29925×10⁶ m/s

Explanation:

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velocity = 855 m × 35×10⁶ Hz

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Back titration experiment
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A mixture with H2 and He exerts a total pressure of 0.48 atm. If there is 1.0 g of H2 and 1.0 g of He in the mixture, what is th
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Answer is: the partial pressure of the helium gas is 0.158 atm.

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n(H₂) = m(H₂) ÷ M(H₂).

n(H₂) = 1.0 g ÷ 2 g/mol.

n(H₂) = 0.5 mol; amount of hydrogen.

m(He) = 1.0 g; mass of helium.

n(He) = 1 g ÷ 4 g/mol.

n(He) = 0.25 mol; amount of helium.

χ(H₂) = 0.5 mol ÷ 0.75 mol.

χ(H₂) = 0.67; mole fraction of hydrogen.

χ(He) = 0.25 mol ÷ 0.75 mol.

χ(He) = 0.33; mole fraction of helium.

p(He) = 0.33 · 0.48 atm.

p(He) = 0.158 atm; the partial pressure of the helium gas.

8 0
3 years ago
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