Question 1

Which of the following is a homogeneous mixture?

Accepted Answer

Milk

Question 2

Which of the following is a chemical change?

Accepted Answer

The iron is rusting

Question 3

How many significant figures are in the number $$0.00045$$?

Accepted Answer

2

Question 4

Round the number $$0.00278 to 2 $$significant figures.

Accepted Answer

Question 5

Which of the following is an exact number?

Accepted Answer

1 liter = 1000 milliliters

Question 6

Convert $$130$$ kilometers to meters.

Accepted Answer

$$1.30 	imes 10^5$ meters

Question 7

A $$44.6 g $$piece of metal displaces water in a graduated cylinder from $$25.0 mL to$$ $$31.7 mL. $$What is the density of the metal?

Accepted Answer

$$6.66 g/mL$$

Question 8

Convert $$75.0$$ °C to Kelvin.

Accepted Answer

$$348.2 K$$

Question 9

Which of the following is the correct equality for converting inches to centimeters?

Accepted Answer

$$1$$ inch $$= 2.54 cm$$

Question 10

A solution contains $$15.5$$ ppm of lead. How many mg of lead are in $$1.00 L of $$this solution?

Accepted Answer

$$15.5 mg$$

Question 11

Which of the following numbers has 4 significant figures?

Accepted Answer

$$1.234$$

Question 12

Convert $$4.6$$ pounds to grams. ($$1 lb$$ $$= 454 g)$$

Accepted Answer

$$2,088 g$$

Question 13

Which of the following is a physical property?

Accepted Answer

The bus is yellow

Question 14

Calculate the answer and report it to the correct number of significant figures: $$35.7 	imes 9.9$$

Accepted Answer

$$353$$

Question 15

Which of the following is the correct scientific notation for $$0.000098$$?

Accepted Answer

$$9.8 	imes 10$$^{-5}$$

Question 16

A nutrition label states: '1 g fat = 9 kcal'. If your snack contains $$1.5 g of $$fat, how many kcal does it provide from fat?

Accepted Answer

$$13.5$$ kcal

Question 17

Which of the following is a pure substance?

Accepted Answer

Aluminum foil

Question 18

Convert $$1.40 	imes 10^4$ microliters to liters.

Accepted Answer

$$1.40 	imes 10$$^{-2}$$ L

Question 19

Which of the following is a heterogeneous mixture?

Accepted Answer

A glass of water with pebbles in the bottom

Question 20

Which of the following is the correct conversion for $$650$$ kilometers per hour to miles per hour? ($$1$$ mile $$= 1.609 km)$$

Accepted Answer

$$404$$ mph

Test 1: Fundamental Concepts and Calculations in GOB Chemistry

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