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3 years ago

Based on these data, what is the average atomic mass of element b? 10.01 10.51 10.81 11.01

Chemistry

2 answers:

Agata [3.3K]3 years ago

6 0

Im pretty sure it is C

Lelechka [254]3 years ago

5 0

The right answer is C. 10.81

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3 years ago

If 156.06 g of propane, C3H8, is burned in excess oxygen, how many grams of water are formed? C3H8 + O2 → CO2 + H2O Select one:

Nastasia [14]

Answer:

The correct option is;

a. 255.0 g

Explanation:

The given information are;

Mass of propane, C₃H₈ in the combustion reaction = 156.06 g

The equation of the combustion reaction is C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

From the balanced chemical equation of the reaction, we have;

One mole of propane, C₃H₈ reacts with five moles oxygen gas, O₂, to form three moles of carbon dioxide, CO₂, and four moles of water, H₂O

The molar mass of propane gas = 44.1 g/mol

The number of moles, n, of propane gas = Mass of propane gas/(Molar mass of propane gas) = 156.06/44.1 = 3.54 moles

Given that one mole of propane gas produces 4 moles of water molecule (steam) H₂O, 3.54 moles of propane gas will produce 4×3.54 = 14.16 moles of (steam) H₂O

The mass of one mole of H₂O = 18.01528 g/mol

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The mass of H₂O produced = 255.0 g

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3 years ago

What name should be used for the ionic compound Ga(SO)? Gallium(III) sulfide gallium(III) sulfate gallium(III) trisulfide galliu

Evgen [1.6K]

Answer: The name given to $Ga(SO_4)_3$ is Gallium (III) sulfate.

Explanation: This is an ionic compound because in aqueous solution it dissociates into its respective ions.

Naming of Ionic compounds.

Name the cation first and then write its oxidation number in roman numerical.
Then name the anion or polyatomic ions without writing any prefix of the number of atoms present in it.
The name of the anion should have a suffix '-ide' like for chlorine, the name will be chloride etc..
For polyatomic ions, the suffix used will be '-ate' like for $SO_4^{2-}$ the name will be sulfate etc..

Name of the given ionic compound is Gallium (III) Sulfate.

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4 years ago

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