Although usain bolt still holds the record for the fastest time in the 100 meter dash, wayde van niekerk of south africa holds the record for the 400 meter which is going around the entire track and returning to their start position. wayde's record is 400 meters in 43.03 seconds. what was wayde's velocity during his record time?

Can anyone (a-level) a student was analysing a carbonate compound, mco3, containing an unknown group 2 metal, m. the student carried out thermal decomposition on 0.730g of the carbonate and measured the volume of gas produced. mco3 (s) mo (s) + co2 (g) the student collected and measured 120cm3 of carbon dioxide. 1 mol of carbon dioxide occupies 24 000 cm3 under these conditions. calculate the molar mass of the group 2 carbonate and hence deduce the identity of the group 2 metal, m.

What is the mass of 8 moles of sodium atoms

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous