Question

A word problem tells you that you have 27.8 moles of carbon dioxide. It asks how much that is in grams of carbon dioxide.

Luckily, they also supply a conversion factor.

1 mole of carbon dioxide is equal to 44 grams of carbon dioxide.

You set up a conversion equation in the format shown in the image.

What would you write in the space labeled 'C' in the diagram.(?)


A) 1 mole of carbon dioxide


B) 44 grams of carbon dioxide


C) 27.8 moles of carbon dioxide

Answer 1

we need to cancel the units

b/c would be equal to 1 to retain the same amount, remember, 1a=a


so
b/c=1mol/44g or 44g/1mol

alrighty
we waant to convert 27.8mols
so therefor a=27.8mol


27.8mol times b/c=D
we want c to be mols and b to be grams so the mols cancel

so thefor c=1mol

it would look like this:
$(\frac{27.8mol}{1})*(\frac{44g}{1mol}=\frac{(27.8mol)(44g)}{(1)(1mol)}=$
$\frac{(27.7)(44g)}{1}$


I would write 1 mol of carbon dioxide for C (choice A)