Which of the following will result in a chemical change?
a. burning coal in a furnace
b. drying wood in a shed
c. melting ice to obtain water
d. evaporating alcohol into vapor

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.

Which of the following units is not an official si unit? mole liter kilogram ampere

Which of the following units is not an official si unit