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lozanna [386]
2 years ago
9

When a 4.2 gram sample of mercury (Il) oxide, HgO is decomposed into its elements by •

Chemistry
1 answer:
Usimov [2.4K]2 years ago
7 0

Hg = (3.2 : 4.2) x 100% = 76.19%

O = (1 : 4.2) x 100% = 23.81%

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How many moles of oxygen are necessary to generate 28 moles of water, according to the following equation: 2H2+O2→2H2O
valentinak56 [21]

The number of moles of oxygen required to generate 28 moles of water from the reaction is 14 moles

<h3>Balanced equation </h3>

2H₂ + O₂ —> 2H₂O

From the balanced equation above,

2 moles of water were obtained from 1 mole of oxygen

<h3>How to determine the mole of oxygen needed </h3>

From the balanced equation above,

2 moles of water were obtained from 1 mole of oxygen

Therefore,

28 moles of water will be obtained from = 28 / 2 = 14 moles of oxygen

Thus, 14 moles of oxygen are needed for the reaction

Learn more about stoichiometry:

brainly.com/question/14735801

5 0
2 years ago
what tool do you have to use to precise amount of water? A meter stick B stopwatch C balance D graduated cylinder E beaker F the
Serhud [2]

Answer:

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It shows exact volume very precisely.

8 0
3 years ago
Where is groundwater stored?
Tema [17]

Answer:

Answer Below! : )

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8 0
2 years ago
Read 2 more answers
a scientists finds an organism that cannot move. it has many cells, produces spores, and gets food from its environment. in whic
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The correct answer is : The Organism belongs in Kingdom Fungi


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How many molecules of sodium nitrate are produced when 40 g of sodium azide, NaN3, react with oxygen?
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