Chemistry - 9 Chapter - 2
Chemical combination and Chemical Equations
Test - 5

1. Cr2 O7-2 is the formula of ___________.




2. S2O3-2 is the formula of ______________.


3. Sand (SiO2) is a ________________ compound


4. 14. CH3COOH and C6H12O6 have same empirical formula, that is ___________.


5. The molecular formula of sulphur is ______________.


6. The empirical formula of benzene is ______________.


7. The molecular mass of water is ______________.


8. The number _____________ is called Avogadro's number.


9. The mass of one mole of a substance is called __________mass.


10. Formation of a precipitate is a _____________ change


11. A complete balanced equation tells us the ____________ ratio between the reactants and products.


This is more feedback!
This is the feedback!