Which of these are measures of quantity?

3 moles of sand grains on a beach

25-pound bag of sugar

16 gigabytes of memory

2-liter bottle of soda

Compare the first ionization energy of sodium to that of potassium

Can an isotope also be an ion?

Why does platinum metal make a good catalytic surface for reactant molecules? a. It causes reactant molecules to be less reactive. b. It strengthens bonds between reactant molecules. c. It prevents products from breaking away from the surface. d.

Which of the following elements has the lowest electronegativity? a. bromine b. lithium c. carbon d. fluorine

Radioactive radon-222 gas (222rn) occurs naturally as a product of uranium decay. the half-life of 222rn is 3.8 days. suppose a flask originally contained 4.0*1013 atoms of 222rn. how many atoms of 222rn will remain after one month (30. days) ?

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.

How are linear and nonlinear graphs alike

Uranium nuclei split during nuclear fission true or false

Calculate the mass of 2.25*10^22tungsten atoms.

Which weathering process involves physical forces but not chemical reactions or dissolving of minerals