Concentration and ion moles are equal only when volume is what?

The number of protons in an atom is called the what?

What situation would reduce the dissolved oxygen content of water

What is the temperature at which a solid melts? a physical property a chemical property a chemical change a physical change

When the reaction 3 no (g) → n2o (g) + no2 (g) is proceeding under conditions such that 0.015 mol/l of n2o is being formed each second, the rate of the overall reaction is? and the rate of change for no is?

Write a balanced equation for Calcium nitrate decomposes on heating to give solid calcium nitrate and oxygen gas.

This chart shows characteristics of three different types of atoms. A 3-column table with one row titled valence electrons in three types of atoms. The first column labeled Atom X has entry 6 valence electrons.

How many times more massive is an oxygen atom than a hydrogen atom?

In the Haber process, ammonia is formed as the reaction moves in which direction?

Divide the difference between one thousand three hundred and nine hundred fifty by 4

Is crashing cans a physical or chemical change? Explain why?