When a chemical reaction takes place, the total mass of the reactants equals the total mass of the products. the total number of atoms of reactants also equals the total number of atoms of products. in the following reaction, 18g of hydrogen react completely with 633g of chlorine. how many grams of hcl are formed?

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What are the chemical names of these compounds? ke: mg3n2: reset next

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?