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9966 [12]
2 years ago
13

In the explosion of a hydrogen-filled balloon, 0.10 g of hydrogen reacted with 0.80 g of oxygen to form how many grams of water

vapor? (Water vapor is the only product.)
Express your answer using two significant figures.
Chemistry
1 answer:
lidiya [134]2 years ago
8 0

Mass of water vapor produced : 0.90 g

<h3>Further explanation</h3>

Given

0.10 g of hydrogen reacted with 0.80 g of oxygen

Required

mass of water vapor produced

Solution

Reaction

2H₂ + O ⇒ 2H₂O

If we refer to the law of conservation of mass which states that the mass before and after the reaction is the same, then the mass of water vapor formed as a product is:

mass reactants = mass products

mass of Hydrogen + mass of Oxygen = mass of water vapor

0.1 g + 0.8 g = 0.90 g

Or we can also solve<em> by using stochiometry</em> (using the concept of moles) to find the mass of water vapor

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What mass of Ca(NO3)2 is equal to 0.75 moles of this substance?
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