1. For simplicity, suppose a grain of sand is a cube that is 0.2 millimeter on each edge. About how many grains of sand packed tightly together would it take to
make a beach 300 meters long, 25 meters wide, and 5 meters deep?

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

The minerals found in bones are deposited by living cells called