How many protons are there in 6.0 g of nitrogen gas?
(Avogadro constant, L = 6.022 × 1023 mol–1)
Year 12 Chemistry - Summary Quiz
Quiz
•
Chemistry, Science
•
11th - 12th Grade
•
Hard
Mrs Ollis
Used 47+ times
FREE Resource
40 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
How many protons are there in 6.0 g of nitrogen gas?
(Avogadro constant, L = 6.022 × 1023 mol–1)
1.3 × 1023
9.0 × 1023
1.8 × 1024
3.6 × 1024
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The diagram shows how a property of Period 3 elements varies across the period.
What is the property?
Atomic radius
Electronegativity
First ionisation energy
Melting point
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which statement about barium sulfate is correct?
It is soluble in water at a temperature of 100 °C.
It is used in medicine because it does not dissolve in body fluids.
It is a pale yellow solid.
It reacts with acidified barium chloride solution.
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which statement is correct about the reaction between concentrated sulfuric acid and solid sodium bromide?
Bromide ions are reduced.
Hydrogen bromide and sulfur are formed.
Sulfuric acid acts as an oxidising agent.
Bromine and hydrogen sulfide are formed.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which element has the highest first ionisation energy?
Aluminium
Phosphorus
Silicon
Sulfur
6.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
A solution of volume 500 cm3 contains 150 g of ammonia.
What is the concentration, in mol dm–3, of ammonia in this solution? (Give answer to 3sf)
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A student devised an experiment to find the concentration of sulfuric acid in a sample of battery acid.
• A measuring cylinder was used to transfer 10 cm3 of battery acid to a volumetric flask.
• Distilled water was added to the volumetric flask until the volume reached 250 cm3
• A 25.0 cm3 sample of diluted acid was transferred from the volumetric flask to a conical flask using a pipette.
• A few drops of methyl orange indicator were added to the acid in the conical flask before titrating the acid with sodium hydroxide.
• The titration was repeated five times but concordant results were not obtained.
(Note: Methyl orange is red in acid and yellow in alkali.)
Which suggestion would improve the chances of obtaining concordant titres?
Invert the volumetric flask several times after adding the distilled water.
Wash the pipette with distilled water between each titration.
Add extra drops of indicator to the sample when nearing the end point in each titration.
Use a more concentrated solution of sodium hydroxide in the burette.
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