# Chemistry Notation Questions

A) Provide the type of measurement (volume, length, temperature etc.) for the following units:

i) 298 K

ii) 65 mL

iii) 15 m

iv) 290 kg

v) 50 g

b) Write the following measurements in scientific notation:

i) 150000000 kg

ii) 0.28 L

iii) 0.00004 m

c) Answer whether the numbers in each of the following statements is measured or exact:

i) The Cambrian explosion occurred 545000000 years ago.

ii) 26 students went for the field trip.

iii) The number of microbes on a telephone is 25600.

d) State how many significant figures there are in each of the following measured quantities:

i) 18.000 m

ii) 52.80 L

iii) 7.0 X 10-14 kg

e) Round off each of the following numbers to two significant figures:

i) 66.666

ii) 0.0063424

iii) 9577