C5: Quantitative chemistry
Quiz by Oxford Revise Combined Science
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15 questions
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- Q1In a chemical reaction, atoms are not created or destroyed, just rearranged, so total mass before = total mass after the reaction. What is this name of this phenomenon?conservation of masspreservation of massmatter balanceconservative matter60s
- Q2When a metal forms a metal oxide, why does the mass increase?atoms from gaseous nitrogen have been addedatoms from gaseous hydrogen have been addedatoms from gaseous oxygen have been removedatoms from gaseous oxygen have been added60s
- Q3When an acid reacts with a metal, why does the mass decrease?a liquid is produced and is addeda liquid is produced and escapesa gas is produced and escapesa gas is produced and is added60s
- Q4What is relative formula mass?the sum of the relative atomic masses of each atom in an elementthe sum of the relative atomic masses of each atom in a substancethe sum of the relative atomic numbers of each atom in a substancethe total mass of a substance produced in an atomic reaction60s
- Q560s
- Q660s
- Q7What does the ($g$) mean on a symbol equation?gasliquiddissolved in watersolid60s
- Q8How can you tell when a symbol equation is balanced?the number of atoms of each element is the same on both sidesthe states of the products and reactants are the same on both sidesthe number of atoms of each element is doubled on both sideswhen you have the same elements on both sides of a reaction60s
- Q960s
- Q1060s
- Q1160s
- Q1260s
- Q1360s
- Q14If the amount of solute in a solution is increased, what happens to its concentration?stays the sameincreasesdecreases60s
- Q15If the volume of water in a solution is increased, what happens to its concentration?decreasesincreasesstays the same60s