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?

This line graph compares the growth of plants that were kept in the sun for different amounts of time.a)  on day 7, the plants kept in the sun for 3 hours were how tall? b)  on day 7, the plants kept in the sun for 6 hours were how tall? c)    on day 10, the plants kept in the sun for 9 hours were how tall? d)  on day 11, the plant that was grown with 1 hour of sunlight was how tall? e)  based on the graph, the plant grows best in what amount of sunlight?

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

How to calculate the mass of copper