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Amount of substance

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AS Chem (Chem 1) Quiz on Amount of substance, created by Megan McLean on 14/05/2014.
Megan McLean
Quiz by Megan McLean, updated more than 1 year ago
Megan McLean
Created by Megan McLean over 10 years ago
25
2
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Resource summary

Question 1

Question
The relative atomic mass can be defined by......
Answer
  • Average mass of one atom of an element x 12 ------------------------------------------------------------------- Mass of an atom of C12
  • Average mass of one atom of an element x 12 ------------------------------------------------------------------- Mass of 1/12th of an atom of C12

Question 2

Question
Number of moles.....
Answer
  • m/mr
  • mr/m

Question 3

Question
Ideal gas equation is.....
Answer
  • PV/T
  • PV=nRT

Question 4

Question
How do you calculate the molecular formula?
Answer
  • Relative mass of empirical formula ----------------------------------------------------- Relative molecular mass
  • Relative molecular mass ------------------------------------------------------ Relative mass of empirical formula

Question 5

Question
Concentration = ...........
Answer
  • Volume in dm --------------------------- Number of moles
  • Number of moles ---------------------------- Volume in dm

Question 6

Question
Number of moles in solution....
Answer
  • M x 1000 ------------- V
  • M x V ---------- 1000

Question 7

Question
Atom Economy (%)......
Answer
  • Mass of desired product ------------------------------------ x1000 Total mass of product
  • Mass of desired product ---------------------------------- x100 Total mass of product

Question 8

Question
Yield of a chemical reaction......
Answer
  • The number of moles or grams of a specified product -------------------------------------------------------------------------------- x 100 Theoretical maximum number of moles or grams of the product
  • The number of moles or grams of a specified product -------------------------------------------------------------------------------- x 1000 Theoretical maximum number of moles or grams of the product

Question 9

Question
Yield of a chemical reaction......
Answer
  • The number of moles or grams of a specified product -------------------------------------------------------------------------------- x 100 Theoretical maximum number of moles or grams of the product
  • The number of moles or grams of a specified product -------------------------------------------------------------------------------- x 1000 Theoretical maximum number of moles or grams of the product
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