WorksheetsChemistry AS Module 2.1 Foundations
Total questions: 20
Worksheet time: 10mins
A chloride ion (Cl-) has has many protons, neutrons and electrons?
17 protons, 18 neutrons, 17 electrons
17 protons, 18 neutrons, 18 electrons
17 protons, 23 neutrons, 18 electrons
18 protons, 17 neutrons, 18 electrons
A sample of boron contains 19.77% 10B and 80.23% 11B, What is its relative atomic mass?
10.80
10.20
10.50
10.75
What is the relative formula mass of CaBr2 ?
(a)
How do you represent a nitrate ion?
NO-
NO32-
NO2-
NO3-
What is the formula for aluminium sulfate?
Al2(SO2)3
Al3(SO4)2
Al2(SO4)3
Al2(SO4)2
Predict the formula of Iron(III) chloride
FeCl2
FeCl3
Fe3Cl
FeCl
What is Avogadro's constant?
6.02 x 10-23
6.03 x 1022
6.02 x 1024
6.02 x 1023
How many moles in 11.0g of carbon dioxide?
(a)
Calculate the mass in g of 3.00 mol of SiO2
180.30
0.05
20.03
180.00
A compound contains 74.19% sodium, 25.81% oxygen, what is its empirical formula?
NaO
Na2O
NaO2
Na3O
A compound has an empirical formula of C4H10 and a relative formula mass of 174. What is its molecular formula?
C4H10
C8H20
C12H30
C16H40
What is the volume in dm3 of 32.0g of O2 at RTP?
(a)
Calculate the concentration of 6 moles dissolved in 2dm3 of solution.
0.33 mol dm-3
3 mol dm-3
3 x 10-3 mol dm-3
What is the mass of potassium hydroxide required to prepare 250cm3 of a 0.200mol dm-3 solution?
2800g
2805g
2.800g
2.805g
Balance: N2(g) + (a) H2 (g) → 2NH3 (g)
What word would you use to define a substance that can behave as both an acid and a base?
(a)
An acid reacts with a metal to form a salt and what else?
(a)
Ammonia reacts with hydrochloric acid to make the salt ammonium chloride. What is the formula of ammonium chloride?
NH4Cl
NH4Cl2
(NH4)2Cl
NH3Cl
What is the oxidation state of nitrogen in N2O5?
+10
+5
-5
-10
Mg + Cl2 → MgCl2
In this redox reaction , what is happening to magnesium?
Reduction
Oxidation
