Q1.
all radio waves travel at 300 000 000 m/s in air
(1)
give the equation that links the frequency, speed and wavelength of a wave.
calculate the wavelength, in metres, of a radio wave which is broadcast at a frequency
of 909 khz,
wavelength =

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

If 16.00g of hydrogen gas reacts with 126.73g of oxygen, how many grams of water are yielded? (both reactants are completely consumed in the reaction.)

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?