What is the oxidation state of the underlined atom in the compound: CO2?

How many moles of zinc (Zn) atoms are in a 84.3 g sample of pure zinc?

A spray can is used until it is empty except for the propellant gas, which has a pressure of 1,300. torr at 23 °C. If the can is thrown into a fire (T = 475 °C), what will be the pressure, in torr, in the hot can?

Provide the name for the chemical shown below.   K2CO3

How many moles of aluminum are needed to make 9 moles of molecular hydrogen? Given the reaction: 2Al + 6HCl → 2AlCl3 + 3H2

What is the oxidation state of the underlined atom in the compound: CO2?

Provide the name for the chemical shown below.   Mg(NO3)2

The number of electrons tells you the                          of an atom.

A weather balloon contains 1.67 moles of helium at a pressure of 0.992 atm and a temperature of 25 °C at ground level. What is the volume, in L, of the balloon under these conditions?

How many significant figures are in the number 0.0000439200