1)Enter a whole number (e. 10 ). A compound that contains 27.0% S, 13.4% O, and 59.6% Cl by mass. Its empirical formula contains ___ S atom(s), ____...

1)Enter a whole number (e.g. 10).

A compound that contains 27.0% S, 13.4% O, and 59.6% Cl by mass.

Its empirical formula contains  ___ S atom(s),  ____  O atom(s) and ____  Cl atoms.

2) 

Nitrogen dioxide is a reddish-brown, toxic gas.  What is the mass of 9.44 x 1024 molecules of nitrogen dioxide?  Enter a number, without units, in the blank space provided.

____ g

3) 

If the percent yield for the following reaction is 65.0%, how many grams of KClO3 are needed to produce 42.0 g of O2?

2 KClO3(s) → 2 KCl(s)+ 3 O2(g)

_____ g