If two atoms are isotopes of the same element, the atoms must have 1.
the same number of protons and the same number of neutrons
2.
the same number of protons and a different number of neutrons
3.
a different number of protons and the same number of neutrons
4.
a different number of protons and a different number of neutrons

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas