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2 years ago

Which statements accurately describe density? Check all that apply.

Chemistry

2 answers:

Sidana [21]2 years ago

8 0

Explanation:

Density is the mass of an object or substance per unit volume. The symbol for density is and it can be calculated using the formula as follows.

$\rho$ = $\frac{mass}{volume}$

Density is derived from mass which can be in grams or kilograms and volume which can be in liters etc. Therefore, density is a derived unit of measurement. We do not need any balance or scale to determine the density.

The statements in the options that accurately describe density are as follows.

Density is the ratio of mass to volume.
Density is a physical property of an object.
Density is a derived unit of measurement.

zysi [14]2 years ago

4 0

Density is a derived unit of measurement

Density is the ratio of mass to volume

Density is a physical property of an object

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Number of gold, $Au$ atoms in $KAu(CN)_2$ = $6.66\times 10^{20}$ atoms (given)

From the formula of compound that is $KAu(CN)_2$ it is clear that the number of potassium and gold are same whereas those of carbon and nitrogen are 2 times of them.

So, the number of atoms of each element is:

Number of potassium, $K$ atoms in $KAu(CN)_2$ = $6.66\times 10^{20}$ atoms

Number of carbon, $C$ atoms in $KAu(CN)_2$ = $2\times6.66\times 10^{20}$ atoms = $13.32\times 10^{20}$

Number of nitrogen, $N$ atoms in $KAu(CN)_2$ = $2\times6.66\times 10^{20}$ atoms = $13.32\times 10^{20}$

Total number of atoms in $KAu(CN)_2$ = Number of gold, $Au$ atoms+Number of potassium, $K$ atoms +Number of carbon, $C$ atoms + Number of nitrogen, $N$ atoms

Total number of atoms in $KAu(CN)_2$ = $6.66\times 10^{20}+6.66\times 10^{20}+13.32\times 10^{20}+13.32\times 10^{20}$

Total number of atoms in $KAu(CN)_2$ = $39.96\times 10^{20}$ atoms

Hence, the total number of atoms in $KAu(CN)_2$ is $3.996\times 10^{21}$ atoms.

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