how many molecules are in 2.1 moles of hbr?\n$\frac{6.02\times 10^{23}\text{ molecules of hbr}}{1\text{ mol…

how many molecules are in 2.1 moles of hbr?\n$\frac{6.02\times 10^{23}\text{ molecules of hbr}}{1\text{ mol hbr}}=\frac{x}{2.1\text{ mol hbr}}$\n$x = ?\times 10^{?}\text{ molecules of hbr}$\nenter the coefficient in the green box and the exponent in the yellow box.

how many molecules are in 2.1 moles of hbr?\n$\frac{6.02\times 10^{23}\text{ molecules of hbr}}{1\text{ mol hbr}}=\frac{x}{2.1\text{ mol hbr}}$\n$x = ?\times 10^{?}\text{ molecules of hbr}$\nenter the coefficient in the green box and the exponent in the yellow box.

Answer

Explanation:

Step1: Cross - multiply the proportion

$6.02\times10^{23}\text{ molecules of HBr}\times2.1\text{ mol HBr}=1\text{ mol HBr}\times x$

Step2: Solve for $x$

$x = 6.02\times2.1\times10^{23}$ $x=12.642\times10^{23}$ $x = 1.2642\times10^{24}$

Answer:

Coefficient: $1.2642$, Exponent: $24$