Paper 1 Higher - Sample Assessment Q11 Answers
11) One uranium atom has a mass of 3.95 × 10–22 grams.
(a) Work out an estimate for the number of uranium atoms in 1kg of uranium.
(3 marks)
(b) Is your answer to (a) an underestimate or an overestimate?
Give a reason for your answer.
(1 mark)
(Total for Question 11 is 4 marks)
(a) Work out an estimate for the number of uranium atoms in 1kg of uranium.
(3 marks)
(b) Is your answer to (a) an underestimate or an overestimate?
Give a reason for your answer.
(1 mark)
(Total for Question 11 is 4 marks)
Answers
11a)
Answer
2.5 x 1024
Notes
P1 - process to estimate or divide
P1 - c complete process eg. (1 x 103) ÷ (4 x 10-22
A1
11b)
Answer
Under-estimate
Notes
C1 - ft from (i) eg. under estimate as number rounded up but in denominator of fraction
Answer
2.5 x 1024
Notes
P1 - process to estimate or divide
P1 - c complete process eg. (1 x 103) ÷ (4 x 10-22
A1
11b)
Answer
Under-estimate
Notes
C1 - ft from (i) eg. under estimate as number rounded up but in denominator of fraction