Chemistry:

How many characteristic properties must be alike for two substances to be the same?

How does Bohr's model of the atom compare with Thomson's model?

The symbol for xenon (Xe) would be a part of the noble gas notation for the element antimony. cesium. radium. uranium.

What is the net amount of energy released when 1 mole of H2O is produced

How many grams of MgCO3 are required to neutralize 200. mL of stomach acid HCl, which is equivalent to 0.0465 MHCl?

The enthalpy of combustion of hard coal averages - 35 kJ/g, that of gasoline, 1.28 x 105 kJ/gal. How many kilograms of hard coal provide the same amount of hat as is available from 1.0 gallon gasoline? Assume that the density of gasoline is 0.

The label of a gas cylinder has come off in your laboratory. You know that only one species of gas is contained in the cylinder, but you do not know whether it is hydrogen, oxygen, or nitrogen.

Give two example of compound that decompose to give off oxgyen gas

How many moles of gas are contained in a rigid, sealed, 5 L container, at 1 atm of pressure and 22 oc?

What makes up rubbing alcohol?

What are the similarities and differences between protons and neutrons