If I have a cube with a mass of 24g and a volume of 6cm3, what will be the density of the cube? 12g/cm3

144g/cm3

4 g/cm3

2 g/cm3

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

Which metals are called noble metals

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?