How much of a sample remains after five half-lives have occurred?

A. 1/5 of the original sample

B. 1/25 of the original sample

C. 1/32 of the original sample

D. 1/64 of the original sample

How many people in the United states depend on groundwater

How many moles of glucose (C6H12O6) are in 4.0 liters of a 4.5 M C6H12O6 solution?

Who discovered the modern atom?

Equal volumes of an unknown gas and nitrogen () gas take 5.37 min and 3.55 minutes, respectively, to effuse through a small hole. calculate the molar mass (in g/mol) of the unknown gas.

In the formula XF2, the element represented by X can be classified as a (1) Group 1 metal (2) Group 2 metal (3) Group 1 nonmetal (4) Group 2 nonmetal

Is fire hot or cold?

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?

I have 2 electrons is the first shell, 8 in the second, and 6 in the third

The production of plastics makes life, so it benefits society. On the other hand, the production of plastics causes air and water, so it also harms society.

The total number of moles represented by 20 grams of CaCO3 is