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4 years ago

12

Which of the following is the SI unit used to measure mass? a. kilogram b. liter c. meter d. Kelvin Please select the best answe

r from the choices provided A B C D

1 answer:

Ket [755]4 years ago

5 0

Answer: d

Explanation: because it’s right

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Note the molecular mass of a copper(I) oxide molecule in the image below. What is the mass of 8.250 moles of Cu2O?

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Explanation : Given,

Moles of copper(I) oxide = 8.250 mol

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Formula used:

$\text{ Mass of copper(I) oxide}=\text{ Moles of copper(I) oxide}\times \text{ Molar mass of copper(I) oxide}$

Now put all the given values in this formula, we get:

$\text{ Mass of copper(I) oxide}=(8.250moles)\times (143.09g/mole)=1180.5g$

Therefore, the mass of copper(I) oxide is, 1180.5 grams.

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