How many atoms are in 10.4 mol of CI?

Explanation:

To convert from moles to atoms, we must use a number called Avogadro's Number which is:

This number tells us the amount of atoms in a mole.

To convert from moles to atoms, we must multiply Avogadro's number by the amount of moles.

We know there are 10.4 moles of Chlorine. Multiply 10.4 (molar amount) by 6.022 * 10²³ (Avogadro's Number)

Let's round to 3 significant figures, because the original measurement 10.4, has 3 sig figs (1, 0, and 4)

For the number 6.26288, 3 significant figures is the hundredths place. The 2 in the thousandth place tells us to keep the 6 in the hundredths place.

There are about 6.26 × 10²⁴ atoms in 10.4 moles of chlorine.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.