If there is no subscript to the right of a symbol means atom of that element?

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.