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3 years ago

If the density of an object is 5 g/cm3 and it takes up 7 cm3 of space, calculate the mass?

Chemistry

1 answer:

statuscvo [17]3 years ago

8 0

Answer:

<h2>The answer is option A</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of object = 7 cm³

density = 5 g/cm³

The mass of the object is

mass = 5 × 7

We have the final answer as

Hope this helps you

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Answer: CO is a limiting reagent with regards to the Fe production.

Explanation:

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moles of $Fe_2O_3=\frac{\text{mass of} Fe_2O_3}{\text{molar mass of}Fe_2O_3}=\frac{42.7 g g}{159.7 g/mol}=0.2673 mol$

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0.4714 moles of CO will react with 0.1571 moles of $Fe_2O_3$ which means that CO is present in limited amount acting as limiting reagent.

Mole remaining of $Fe_2O_3$ = 0.2673 mol - 0.1571 mol = 0.1102 mol

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3 years ago

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Answer:

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I guess

Explanation:

hope this helps

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Answer:

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3 years ago