Which electrons in an atom make chemical bonds? why?

One electron has a mass of 1 amu 2 amu 0 amu 3 amu

Which is an example of an exothermic process?

How many grams of Lead (II) nitrate are present in 150.0 mL of an Lead (II) nitrate solution that is 0.07268 M?

A lemon with mass 0.3 kg falls out of a tree from a height of 18 m. how much mechanical energy does the lemon have just before it hits the ground?

True or False: DNA is our genetic make-up. It is why we have a certain eye color, and hair color, etc.

Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are CO2 (g), H2O (g), and B2O3 (s).

Which of the following polymers is used in plastic bottles and plastic containers? Select one: a. LDPE b. PVC c. Polystyrene d. HDPE e. Polypropylene

Which of the following statement is not true? A) The sun is involved in producing tides B) There can be two high tides in one location during a single day C) Only the oceans have tides D) If there is a high tide, there will be a low tide

A solution which has a concentration that exceeds its predicted solubility at a certain temperature and pressure would be -

Convert 4.992*1010 g to each of the following units. B. Mg c. mg D. metric tons