The half-life of radioactive element krypton-91 is 10 seconds. if 16 grams of krypton-91 are initially present, how many grams are present after 10 seconds? after 50 seconds?

Something that does not have the ability to react is considered

Period 4 of this periodic table is highlighted. What happens as you move from right to left across the period? The elements become more reactive. The elements change from metals to nonmetals. The elements become less stable.

Which of these is an example of a physical change? A. breaking bread B. digesting bread C. baking bread D. toasting bread

Determine the concentrations of hg22 and cl - in a saturated solution of hg2cl2 in a. pure water (assume μ = 0).

According to the periodic table, how many electrons does gallium (#31) have in its valence level? 3 13 31 2

An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law

Whats the main difference between a double replacement reaction and a single replacement

When is the absorption spectrum of an electron generated?

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration.

Which describes the volume of 1 mol of gas at standard temperature and pressure? ER The volume is greater for a larger mass of gas. The volume is the same for any gas. The volume depends on the size of the container.