If the half-time of krypton-81 is 229,00 years, how much krypton-81 was present when the ice first formed

0.80 g of hydrogen chloride (hcl is dissolved in water to make 5.5 l of solution. what is the ph of the resulting hydrochloric acid solution?

In terms of pH what would happen if you mixed vinegar with a solution of ammonia. What type of product will form?

Which unit can be used to express the concentration of a solution

Why is water a polar molecule??

Find the volume of 3.0 x 10 25 molecules of Neon gas at STP

In the thermal decomposition of copper carbonate, the black solid left behind weights less than the original copper carbonate. Why?

How many joules are needed to warm 675 grams of water (specific heat = 4.186 J/g degrees Celsius) from 12 degrees Celsius to 85 degrees Celsius?

Pentaborane b5h9 (s) burns vigorously in o2 to give b2o3 (s) and h2o (l). what is δh° for the combustion of 1 mol of b5h9 (s) ? substance δh°f (kj/mol) b2o3 (s) - 1273.5 b5h9 (s) + 73.2 h2o (l) - 285.8

What is the definition of STP?

Which of the following is a possible definition of a base? A. A substance that increases the concentration of hydronium ions in a solution B. A compound that is a hydrogen ion acceptor in an acid-base reaction C.