c3 quantitative chemistry

Question 1

What is the law of conservation of mass?

Answer 1

no, atoms are lost origin of chemical reaction, so there’s some of the relative formula mass of the reactants is equal to the sum of relative formula masses of of the products

Question 2

what is Avogadros constant?

Answer 2

6.02 x10^23

Question 3

What is the relative atomic mass?

Answer 3

average mass of an element considering the masses and abundances of its isotopes

Question 4

how do you find relative formula mass?

Answer 4

There’s some of the relative atomic masses of the atoms

Question 5

How can you estimate uncertainty

Answer 5

considering the resolution of measuring instruments, and from finding the range of a set of repeated measurements 

Question 6

What is the resolution of a
measuring instrument?

Answer 6

The smallest change in quantity that gives a change in the reading that can be seen, for example, a thermometer that with the market every 1°

Question 7

how do you measure the uncertainty?

Answer 7

Half the range

Question 8

what is a solution

Answer 8

The mixture of one or more solutes

Question 9

what is a solvent

Answer 9

The substance in which the solute dissolves

Question 10

what is a solute

Answer 10

The substance that dissolves

Question 11

What is concentration of a solution?

Answer 11

how crowded the solute particles are

Question 12

what is concentration measured in

Answer 12

g/dm^3

Question 13

What is mass measured in?

Answer 13

g

Question 14

What is volume measured in?

Answer 14

dm^3

Question 15

How do you calculate concentration?

Answer 15

mass of solute/volume

Question 16

what is 1dm^3 in centimetres

Answer 16

1000 cm^3

Question 17

How can you change the concentration of a solution?

Answer 17

it could be increased by dissolving more solute
it could be increased by allowing some of the solvent to evaporate

Question 18

what is a mole?

Answer 18

A unit that measures chemical amounts, because the actual masses of atoms molecules and ions are too small to be useful in the calculations

Question 19

One mole of a substance is equivalent to:

Answer 19

The relative atomic mass of its formula in grams of the substance is an element, and the relative formula mass of its formula in grams, if the substance is a compound

Question 20

How do you calculate the number of particles in a substance?

Answer 20

avogrados constant x The amount of substance in mol

Question 21

What is the link between mass and moles?

Answer 21

Relative formula mass

Question 22

How do you calculate the mass?

Answer 22

relative formula mass x amount (mol)

Question 23

how do you calculate the amount of a given mass substance?

Answer 23

Mass/relative atomic or formula mass

Question 24

how many moles are there if there is no coefficient

Answer 24

One

Question 25

What can you calculate with balanced equations and relative formula mass values?

Answer 25

The mass of products made from a given mass of reactants, and the mass of reactants needed to make a given mass of product

Question 26

how can you work out the balancing numbers in an equation

Answer 26

Using the masses found by experiment

Question 27

how do you find the amount of solute in mol?

Answer 27

Concentration x volume