Why doesn't light get absorbed

When you see the word heptahydrate, what number should be written in front of the formula for water? 5 6 7 8?

Са Нѕ он сня 1 3 с-с-с-с-сно 빌 СН3 cool CH 3

Which term describes the sum of the number of protons and neutrons in an atom? A nuclear charge B mass number C atomic charge D atomic number

How many atoms are in 17.3 mol Hg?

F an atom gains 2 electrons, what is the charge on the resulting ion? b. give an example.

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum