3 years ago

When a gas is heated,

1 answer:

6 0

Answer: when gas is heated ,they gain more kinetic energy causing them to move faster.

Explanation: so as they gain kinetic energy they hit the walls of the container with more force thus causing pressure to increase

HOPE THIS HELPSS comment if u need more explanation

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svlad2 [7]

69.9%

Explanation:

To find the mass percentage of iron in the compound in Fe₂O₃, we would go ahead to express the given molar mass of the iron to that of the compound.

Mass percentage = $\frac{molar mass of Fe}{Molar mass of Fe_{2}O_{3} }$ x 100

Molar mass of Fe = 55.85g/mol

Molar mass of O = 16g/mol

Molar mass of Fe₂O₃ = 2(55.85) + 3(16) = 159.7‬g/mol

Mass percentage = $\frac{2(55.85)}{159.7} x 100$ = 69.94% = 69.9%

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One AMU or 1 Atomic Mass Unit

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