What is the molar mass of a substance?

the mass in grams of one mole of a substances

the number of particles in one gram of a substance

the number of moles in one grár of a substance

the mass in grarns of one particle of a substance

Which of these is an example of a physical change! A baking a cake B toasting bread C grinding pepper D lighting up a grill

What do the objects in motion have in common

Which rigid cylinder contains the same number of gas molecules at STP as a 2.0-liter rigid cylinder containing H2 (g) at STP? (1) 1.0-L cylinder of O2 (g) (2) 2.0-L cylinder of CH4 (g) (3) 1.5-L cylinder of NH3 (g) (4) 4.0-L cylinder of He (g)

A spring has 200 J of EPE when it is stretched 1 m. What is the spring constant? A. 600 N/m B. 800 N/m C. 400 N/m D. 200 N/m

How many electrons does oxygen need to complete its octet? a) 1 b) 2 c) 3 d) 4 e) 6

What is more dangerous, current or voltage? Why?

What is the significance of the symbol of an element?

Consider the half reactions below for a chemical reaction. 2 Equations: First: upper M g right arrow upper M g superscript 2 plus (a q) plus 2 e superscript minus.

If you put some sodium chloride (table salt) into a glass of water, what will happen?

Why don't the inert gases easily react with other elements?