Quiz | Chemistry and the Scientific Method

1

What is the SI unit of the temperature?

K – Kelvin

°C – Celsius

°F – Fahrenheit

J – Joule

The SI unit of the temperature is Kelvin (K)
2

What is the SI unit of the mass?

mol – mole

g – gram

kg – kilogram

lb – pound

The SI unit of the temperature is the kilogram (kg)
3

What is the conversion of 1 pm in meter?

10-9 m

10-10 m

10-12 m

10-15 m

pico- (p) means 10-12 ⇒ 1 pm = 10-12 m

4

What is the kinetic energy of a car (m = 1.30 x 103 kg) running at 100 km.hour-1?

1.81 x 104 J

5.02 x 105 J

1.00 x 106 J

5.02 x 108 J

Kinetic Energy (Ek) = 12 mv2   and   100 km.hour-1 = 27.8 m.s-1

5

How many significant figures do you have in the number 00.0002030?

3

4

7

8

00.0002030 has 4 significant figures

6

What is the result of this calculation: 0.236 x 3.658?

0.86

0.863

0.8632

0.8633

Multiplication: number of significant figures of the answer = the smallest number of significant figures of the numbers in the calculation
0.236 and 3.658 ⇒ the answer will have 3 significant figures