Actinium-226 has a half-life of 29 hours if 100 mg of actinium-226 disintegrates over a period of 58 hours how many mg of actinium-226 will remain

A 10kg bowling ball would require what force to accelerate down an alleyway at a rate of 3m/s2?

Why are protons in an atom so important? Question 5 options: A. Protons determine the atoms' identity (type of element) and where it is located on the periodic table. B. Protons are bigger than all the other particles in an atom. C.

Sodium sulfate reacts with carbon to produce the products sodium sulfide and carbon monoxide. Identify the reducing agent in the following reaction. Na2SO4 + 4C yields Na2S + 4CO Na2SO4 C Na2S CO

If kinetic energy is increases by 300% then what

Which contains more atom, a mole of silver atoms or a mole of gold atoms?

What process transform solar energy into chemical energy?

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?

Attempt 2 A sample of gas contains 49.16 % N 2 gas, 19.85 % Br 2 gas, 9.95 % CO 2 gas, and 21.04 % of an unknown gas. The average atomic mass of the gas mixture is 50.71 u. Calculate the atomic mass of the unknown gas.

A chemist determined by measurements that. 040 moles of gold participated in a chemical reaction. calculate the mass of gold that participated in the chemical reaction. round your answer to significant digits.