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serious [3.7K]
3 years ago
8

Why does density increase with more helium

Chemistry
1 answer:
Anton [14]3 years ago
3 0

Answer:

density increases with more helium because of its molar mass

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Suppose that .625 mol HBr partially react with Li to give .278 mol H2. Determine the number of moles HBr remain. SHOW PROCESS, I
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How many hydrogen atoms are in 5.80 mol of ammonium sulfide
IRINA_888 [86]

Moles of ammonium sulfide =  5.80 mol

The formula of ammonium sulfide is (NH₄)₂S

So each molecule of ammonium sulfide has (4 x 2)  or 8 atoms of H

One mole of ammonium sulfide has 8 moles of H

5.80 mol of ammonium sulfide has (8 x 5.8) or 46.4 moles of H

As per the definition of Avogadro's number, 1 mole = 6.022 x 10²³ atoms

46.4 moles of H x (6.022 x 10²³ atoms/ 1 mole of H)

= 2.8 x 10²⁵ H atoms

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3 years ago
Fe2O3 (molar mass = 159.7 g/mol) reacts with CO (molar mass = 28.0 g/mol) according to the equation When 125.6 g of CO reacts wi
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=1.4953 moles

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Iron (III) Oxide is reduced by carbon (II) oxide into Iron. According to the following equation, One mole of Fe₂O₃ react with 3 moles of CO to produce  2 moles of Fe. Thus the reaction ratio of CO to Fe₂O₃ is 3:1  

Fe₂O₃₍s₎ + 3CO  → 2Fe₍s₎ + 3CO₂₍g₎

125.6 grams of CO is equivalent to: 125.6g/28.0g/mol

=4.486 moles.

The number of moles of Fe produced by the reaction is:

=(4.486 moles×1)/3

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4 years ago
100,000 years in the geologic history of Earth would be considered
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". It will mark the time since humans began altering Earth. Starting about 10,000 years ago, it is tentatively being called the Anthropocene."

i dont know if tht will help

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3 years ago
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