1. How much heat is required to vaporize 25 g of water at 100˚C?

The oceans are the major source of moisture for the blank

Talc is a mineral with low conductivity for heat and electricity which is not attacked by acid. it is used in talcum powder and face powder. suppose a sample of talc weighs 13.65 g with a density of 1.75 g/cm3 in mineral oil.

2KCIO3 - - - 2 KCI + 3O2 I want to produce 5.7 mol of O2. How many grams of KCIO3 should i start with? 3.8g KCIO3 698.54g KCIO3 5.7g KCIO3 465.69g KCIO3

Ethyl achohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 j of energy

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.

High-purity silicon is obtained using a three-step process. the first step involves heating solid silicon dioxide, sio2, with solid carbon to give solid silicon and carbon monoxide gas.

If an experiment produces 5g but should have made 500 g what is the percent yield

Satellites orbit Earth in the.

In a basic solution A. concentration of OH - > concentration of H+. B. concentration of OH - < concentration of H+. C. concentration of OH - = concentration of H+. D. concentration of H + > concentration of OH-.

You have two balloons of equal volume at room temperature and 1 atm pressure. One balloon is filled with He and the other is filled with H2. Which statement is true about the relative number of gas particles in the two balloons?1.