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Setler79 [48]
3 years ago
9

A cube has a mass of 42 grams and a volume of 15 cubic centimeters. What is it’s density?

Chemistry
1 answer:
deff fn [24]3 years ago
6 0

Answer:

2.8g/cm³

Explanation:

Given parameters:

Mass of cube = 42g

Volume of cube  = 15cm³

Unknown:

Density of the cube  = ?

Solution:

Density is defined as the mass per unit volume of a substance. It is mathematically expressed as:

 Density  = \frac{mass}{volume}  

So;

 Density  = \frac{42}{15}   = 2.8g/cm³

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During collision , the bodies exert force to each other.

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Analysis of an athletes urine found the presence of a compound with a molar mass of 312 g/mol. How many moles of this compound a
rewona [7]
<h3>Answer:</h3>

= 5.79 × 10^19 molecules

<h3>Explanation:</h3>

The molar mass of the compound is 312 g/mol

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We are required to calculate the number of molecules present

We will use the following steps;

<h3>Step 1: Calculate the number of moles of the compound </h3>

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<h3>Step 2: Calculate the number of molecules present </h3>

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9.615 × 10⁻5 moles of the compound will have ;

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