phosphate PO4-3 phosphite PO3_3 Perchlorate ClO4-1 Permanganate MnO4-1   Choose the letter that shows the correct formula for the compound formed between copper (II) ion and the phosphide ion.A)  CuPO4       B)  Cu2PO4      C)  Cu3(PO4)2   D)  Cu3P2        E)  CuP 

Isotopes are atoms of the same element with the same number of electrons.

Calculate the density of CO2(g) at 100.°C and 10.0 atm pressure. (4 min.) R = 0.0821 L atm/ mol K C = Carbon = 12.011 g//mol O = Oxygen = 15.999 g/mol

The relationship between the energy and wavelength is direct.

Calculate the heat absorbed when 28.6 g of water is heated from 22.0°C to 78.3°C (specific heat of water = 4.184 J/(g·K)). 1 J = 1000 kJ. 4 min.          

Choose the letter which shows the equation balanced.     C3H8(g) + O2(g) ® CO2(g) + H2O(g).   A.  C3H8(g) + O2(g)

Which characteristic does not describe an ideal gas?  

4.5  Skryf die volgende sin in die toekomende tyd: Jy skryf die ander leerders se werk af.  (1) 

1.6  Noem TWEE nadele van advertensies (paragraaf 3)  (2) 

4.11.1  Die onderwyser ________ die rooi das dra, is kwaai.  (1)