If a car travels 400.0 meters in 20.0 seconds, how fast is it going?
m/s
Please help me

As you move from right to left on the periodic table the atomic radius fill in the blank

Which element is least likely to undergo a chemical reaction

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol