Which of the following gases is the heaviest? H 2 S, NH 3, CO, SO 2

A piece of charcoal used for cooking is found at the remains of an ancient campsite. a 0.94 kg sample of carbon from the wood has an activity of 1580 decays per minute. find the age of the charcoal.

4. Why does ammonia, NH3, behave as a base when it reacts with an acid? A It accepts a neutron and becomes NH3+. B It accepts a proton and becomes NH4+. OC It donates a proton and becomes NH2

Which of the following elements has the smallest atomic size?

A branch of chemistry that deals with the determination of the composition of any substance is: analytical chemistry applied chemistry biochemistry physical chemistry

Which one of the following is a double-displacement reaction? A. Zn (s) + 2HCl (aq) - H2 (g) + ZnCl2 (s) B. Ba (OH) 2 (aq) + 2HClO4 (aq) - Ba (ClO4) 2 (aq) + 2H20 (1) C. 2503 (g) - 2502 (g) + 02 (g) D. K2CO3 (s) - K20 (s) + CO2 (g)

What do you call an equation that has all the correct formulas, but is not a balanced equation

What were some reasons why it was a good idea to remove the lid from the separatory funnel after each extraction? Select all that apply.

The half-life of iodine is 8 days. If 700.00 g sample decays to 43.75, how much time has passed

The size of a minerals crystals depends on what?

The density of gold is 19.3 g/cm3. What is the mass of 15cm3 of gold?