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Alex Ar [27]
3 years ago
12

How many molecules are present in 4.5 moles of H2O?

Chemistry
1 answer:
Gekata [30.6K]3 years ago
6 0

Answer:

Mole of the H2O = 4.5

Number of molecules =4.5 multipled by avogadro's number.

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In the decomposition of water, how many grams of hydrogen gas and oxygen gas are produced from 23.44 g of water?
djyliett [7]

Answer:

2.60 g of H₂ and 20.8 g of O₂ are produced in the decomposition of 23.44 g of water

Explanation:

Water decomposition is:

2H₂O → 2H₂ + O₂

We convert the mass of water, to moles:

23.44 g . 1 mol/18 g = 1.30 moles

Ratio is 2:2 with hydrogen and 2:1 with oxygen. Let's make rules of three:

2 moles of water can produce 2 moles of hydrogen gas and oxygen gas

Then, 1.30 moles will produce:

(1.30 . 2) /2 = 1.30 moles of H₂

(1.30 . 1) /2 = 0.65 moles of O₂

We convert the moles to mass

1.30 moles of H₂ . 2g / 1mol = 2.60 g of H₂

0.65 moles of O₂ . 32 g / 1 mol = 20.8 g of O₂

6 0
3 years ago
What is a mole? and how to I convert grams to kilograms and all that?
snow_lady [41]
Newton’s is how you convert kilograms.
6 0
3 years ago
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How many moles of CO2 are produced from the combustion of 5.25 moles of CH3OH?
iVinArrow [24]

First, we write the reaction for CH3OH combustion

CH3OH+3/2O2--->CO2+2H2O

for 1 mole of methanol, we get 1 mole of CO2, therefore for 5,25 moles of methanol we will get 5,25 moles of CO2

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The substance is lipid substance
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How many moles are there in 178 grams of Na 2 SO 4
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There are 1.73 moles in 178 grams of Na2SO4
7 0
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