Help coverting into atoms/molecules?

Question

can any once convert these measurments into atoms /molecules

3.50 moles K

0.573 moles NF3

62.5 moles CO2

7.90 *104 MOLES h20

& please convert these measurments into moles

56.7g C

5.67 g NF3

44.0 g CO2

8.43*10 g Ag

thank you!

Answer 1

mult moles by molecular weight to turn moles into g's
ex: 2 moles of hydrogen... 2 moles * 1.008g= 2.016g H

to turn grams into moles, divide by molecular weight
ex: 2.016gH/1.008= 2 moles H

Answer 2

In the first group,

62.5molCO2 x 6.02x10^23moleculesCO2/1molCO2 = 3.76 x 10^25 molecules CO2

In the second group, atomic weights: N=14 F=19 NF3=71

5.67gNF3 x 1molNF3/71gNF3 = 0.0798 mole NF3

And the rest in the two groups you do in the same way.

Answer 3

I will tell you how-
3.50 moles of any molecule times 6.022x10^23 molecules/mole = molecules

56.7 g of C divided by 12 g per mole (the molar mass of C) = moles of C

Answer 4

a million/4 is a million divided via 4, so do the long branch. 4 is going right into a million, 0 cases. so positioned down a decimal. 4 is going into 10 2 cases, the rest 2. upload a nil and four is going into 20 5 cases, so a million/4 = .25 so the respond is two.25