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2 years ago

Use the following information to answer Q1-Q3

Chemistry

1 answer:

Tju [1.3M]2 years ago

4 0

Answer:

Likely the reason behind carrying them in liquid for is to condense them. liquid takes up far less space than gases do and will last far longer. they can be transformed back into gases through heating them back up. To keep them solid would require frigid temperatures but liquid will transfer more easily through space.

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3 years ago

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Calculate the mass in grams of carbon dioxide produced from 11.2 g of octane (C8H18) in the reaction above.

Ray Of Light [21]

Answer:

34.6g

Explanation:

Given parameters:

Mass of Octane = 11.2g

Reaction expression;

2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O

Mass of octane = 11.2g

Unknown:

Mass of carbon dioxide produced = ?

Solution:

From the balanced reaction equation;

2 mole of octane produced 16 moles of carbon dioxide

From the given specie, let us find the number of moles;

Number of moles = $\frac{mass}{molar mass}$

Molar mass of C₈H₁₈ = 8(12) + 18(1) = 114g/mole

Number of moles of octane = $\frac{11.2}{114}$ = 0.098mole

2 mole of octane produced 16 moles of carbon dioxide

0.098 mole of octane will produce $\frac{0.098 x 16}{2}$ = 0.79mole of CO₂

Mass of CO₂ = number of moles x molar mass

Molar mass of CO₂ = 12 + 2(16) = 44g/mol

Mass of CO₂ = 0.79 x 44 = 34.6g

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3 years ago

6 Which substances have atoms of the same element but different molecular structures?

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So the answer is 2

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Carbon dioxide (CO2) is a gaseous compound. Calculate the percent composition of this compound. Answer using three significant f

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Carbon dioxide is a gaseous molecule made up of the elements, C and O. Each mole of carbon dioxide has one mole C and two mole oxygen atoms.

Molar mass of carbon dioxide ( $CO_{2}$ )= $(1 * 12.01\frac{g}{mol}) +(2* 16\frac{g}{mol})=44.01\frac{g}{mol}$