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ivanzaharov [21]
3 years ago
8

What is the percent composition by mass for hydrogen in water (H2O)?

Chemistry
1 answer:
saw5 [17]3 years ago
5 0

Explanation:

Percentage composition = 2/18 = 11.11%.

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Which element could provide one atom to make an ionic bond with fluorine
Drupady [299]
Lithium i believe is the answer
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5. How many atoms of hydrogen are in a molecule of acetic acid (HC2H202)?
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in acetic acid ,there are 4 hydrogen atoms

Explanation:

C H 3 C O O H

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What is the attraction between molecules within a substance called? adhesion capillary action cohesion polarity.
cestrela7 [59]

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just got it right

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2 years ago
Read 2 more answers
A mixture with H2 and He exerts a total pressure of 0.48 atm. If there is 1.0 g of H2 and 1.0 g of He in the mixture, what is th
lara [203]

Answer is: the partial pressure of the helium gas is 0.158 atm.

p(mixture) = 0.48 atm; total pressure.

m(H₂) = 1.0 g; mass of hydrogen gas.

n(H₂) = m(H₂) ÷ M(H₂).

n(H₂) = 1.0 g ÷ 2 g/mol.

n(H₂) = 0.5 mol; amount of hydrogen.

m(He) = 1.0 g; mass of helium.

n(He) = 1 g ÷ 4 g/mol.

n(He) = 0.25 mol; amount of helium.

χ(H₂) = 0.5 mol ÷ 0.75 mol.

χ(H₂) = 0.67; mole fraction of hydrogen.

χ(He) = 0.25 mol ÷ 0.75 mol.

χ(He) = 0.33; mole fraction of helium.

p(He) = 0.33 · 0.48 atm.

p(He) = 0.158 atm; the partial pressure of the helium gas.

8 0
3 years ago
Choose all the answers that apply.
vovangra [49]
Diabetes,  ALS, and Alzheimeir's.

If this was the appropriate answer make sure to mark as the brainliest!
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