If 34.9g of water is measured out, how many moles is that?

1.94 moles

Explanation:

because moles =mass/mr

=34.9/18

which gives 1.938 so we round it up to 1.94

mr of H2O is 18

hope this helps :)

the product of the pressure and volume is also constant

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).