Q: Which of the following conversions is correct for Celsius to Fahrenheit?

$$^\circ F = (1.8 \times ^\circ C) + 32$$

Question 1

Which of the following is an example of a chemical property?

Accepted Answer

Iron reacts with oxygen to form rust.

Question 2

A student measures the mass of a sample as $$0.1400\ kg. $$How many significant figures does this measurement have?

Accepted Answer

4

Question 3

Which of the following best describes a mixture?

Accepted Answer

A combination of two or more substances in which each retains its own identity.

Question 4

Convert $$4,878,720$$ inches to scientific notation.

Accepted Answer

$$4.87872 	imes 10^6$

Question 5

Which of the following is an exact number?

Accepted Answer

There are $$12$$ eggs in a dozen.

Question 6

A graduated cylinder contains $$25.0\ mL of $$water. If $$0.01\ mL of $$water is added, what is the total volume reported, using the correct number of decimal places?

Accepted Answer

$$25.0\ mL$$

Question 7

Which of the following statements about density is correct?

Accepted Answer

Density is dependent on temperature.

Question 8

A sample of silver has a mass of $$100.0\ g$$ and a density of $$10.40\ g/cm^3$. What is its volume in cm^3$?

Accepted Answer

$$9.62\ cm^3$

Question 9

Which of the following is a physical change?

Accepted Answer

Dissolving sugar in water.

Question 10

A temperature of $$41^\circ C is $$considered a heat stroke in humans. What is this temperature in Kelvin?

Accepted Answer

$$314\ K$$

Question 11

Which metric prefix corresponds to $$10^{-6}$$?

Accepted Answer

micro

Question 12

A $$20.0\ g$$ sample of gold is heated from $$25^\circ C to$$ $$85^\circ C. If $$the specific heat of gold is $$0.031\ cal/g^\circ C$$, how many calories of heat are absorbed?

Accepted Answer

$$37.2\ cal$$

Question 13

Which of the following best describes the difference between 'volume contained within' and 'volume delivered' when using laboratory glassware?

Accepted Answer

'Volume contained within' is the amount of liquid a container can hold, while 'volume delivered' is the amount that can be transferred to another vessel.

Question 14

When multiplying $$12.3\ cm by$$ $$1.2\ cm$$, how many significant digits should the answer have?

Accepted Answer

2

Question 15

Which of the following conversions is correct for Celsius to Fahrenheit?

Accepted Answer

$$^\circ F = (1.8 	imes ^\circ C) + 32$$

Question 16

A student needs to convert $$3.5\ km to$$ $$m. $$Which conversion factor should be used?

Accepted Answer

$$1\ km = 1000\ m$$

Question 17

Which of the following is NOT a rule for determining significant digits?

Accepted Answer

Leading zeros are significant.

Question 18

A beaker contains $$0.00560\ L of $$solution. How many significant digits does this value have?

Accepted Answer

4

Question 19

Which of the following best illustrates the use of dimensional analysis in a real-world scenario?

Accepted Answer

Converting the speed limit from miles per hour to meters per second to comply with international standards.

Question 20

A nurse needs to administer $$250\ mg of $$medication. The available solution is $$2.0\ mg/mL. $$How many milliliters should be given, using the correct number of significant digits?

Accepted Answer

$$1.3 	imes 10^2$\ mL$$

Chapter 1: Matter and Measurements – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard