Skip to content
Back to quiz
6. What is the purpose of a PRODUCT being IN EXCESS?
- To make sure all the reactants are used up
- To make the reaction work
- To make sure an expensive reactant is used up
- To make sure a cheap reactant is used up
7. Why does the CONSERVATION OF MASS LAW sometimes not work?
- If there is a limited reactant in the reaction.
- A gas escapes or joins the reaction, increasing or decreasing mass
- Solid escapes or joins the reaction, increasing or decreasing mass
- Some liquid escapes or joins the reaction, increasing or decreasing mass
8. What is the MOLE?
- The volume of an element
- The amont of atoms in an element
- The amount of a substance
- A name for Avogadro's constant
9. What are the units for VOLUME OF SOLVENT?
10. What is the symbol for RELATIVE ATOMIC MASS?
11. Why are there LIMITING REACTANTS?
- To make sure the reaction works efficiently
- To balance equations
- To use up an expensive reactant
- To use up an expensive product
12. What is the symbol for RELATIVE FORMULA MASS?
13. What are the units for CONCENTRATION?
- m ^2
- g/dm ^3
- dm/g ^3
- g ^3
14. How do you calculate CONCENTRATION?
- solute volume / mass
- mass * volume
- mass / volume
- volume / mass
15. What is CONCENTRATION?
- A measure of the weakness of a solution
- A measure of the density of a solution
- A measure of the acidity of a solution
- The mass of a solution
16. What can you do with REACTING MASSES?
- Balance equations
- Calculate the mass
- Make half life equations
- Calculate the mole
17. What is RELATIVE FORMULA MASS?
- All the relative masses of atoms in a half equation added together.
- All realtive atomic masses of atoms in a molecular formula added together.
- All the relative atomic masses of atoms in a half equation added together.
- All the realtive masses of atoms in a molecular formular added together.
18. What is the formula linking CONCENTRATION, MASS OF SOLUTE + VOLUMES OF SOLVENT?
- Concentration = mass of solute / volume of solvent
- Mass of solute = concentration * volume of solvent
- Mass of solute = concentration / volume of solbent
- Concentration = mass of solute * volume of solvent
19. How do you calculate VOLUME OF SOLVENT?
- concentration / mass
- mass / concentration
- volume * concentration
- mass * concentration
20. What is the calculation linking MASS, MOLES + FORMULA MASS?
- Mass = formula mass * no. of moles
- No. of moles = mass / formula mass
- Formula mass = mass * no. of moles
- Mass = no. of moles / formula mass