Q: Solve the following, including units: $$\frac{2.021 \times 10$$^{12}$$ \ \mathrm{kg} \times 1,000 \ \mathrm{g}}{1 \ \mathrm{kg} \times 4.184 \ \mathrm{J/g}}$$

$$4.83 \times 10$$^{11}$$ \ \mathrm{J}$$

Question 1

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$$2.92 	imes 10^5$

Question 2

Express 0.0008923 in scientific notation.

Accepted Answer

$$8.923 	imes 10$$^{-4}$$

Question 3

How many significant figures are in the measurement 0.0308?

Accepted Answer

3

Question 4

A student needs 500 g of a chemical with a density of $$1.41 \ \mathrm{g/cm^3$}. $$What volume should the student measure?

Accepted Answer

$$354.6 \ \mathrm{cm^3$}$$

Question 5

Convert 9.4 square meters to square feet. ($$1 \ \mathrm{meter} = 3.28 \ \mathrm{feet})$$

Accepted Answer

$$101.5 \ \mathrm{ft^2$}$$

Question 6

A large soft drink has a volume of 0.950 L. What is this volume in mL?

Accepted Answer

$$950 \ \mathrm{mL}$$

Question 7

A stream flows at a rate of 10.4 liters per hour. Convert this rate to cubic meters per day.

Accepted Answer

$$0.2496 \ \mathrm{m^3$/day}$$

Question 8

A waterway contains 10.3 milligrams of an impurity per gallon of water. How many micrograms of impurity are present per liter of water? ($$1 \ \mathrm{gallon} = 3.785 \ \mathrm{L})$$

Accepted Answer

$$2,722 \ \mathrm{\mu g/L}$$

Question 9

Which of the following is the correct abbreviation for kilojoule?

Accepted Answer

kJ

Question 10

How many significant figures should be reported for the result of $$1.44 	imes 10^3$ \div 8.3 	imes 10^2$?

Accepted Answer

2

Question 11

Solve the following, including units: $$\frac{2.021 	imes 10$$^{12}$$ \ \mathrm{kg} 	imes 1,000 \ \mathrm{g}}{1 \ \mathrm{kg} 	imes 4.184 \ \mathrm{J/g}}$$

Accepted Answer

$$4.83 	imes 10$$^{11}$$ \ \mathrm{J}$$

Question 12

What is the mass of a 5.31-mL sample of a liquid with a density of $$2.10 \ \mathrm{g/mL}$$?

Accepted Answer

$$11.2 \ \mathrm{g}$$

Question 13

Convert the average human body temperature of $$98.6^\circ \mathrm{F} to $$degrees Celsius.

Accepted Answer

$$37^\circ \mathrm{C}$$

Question 14

Convert the average high temperature in New York City, $$25^\circ \mathrm{C}$$, to Kelvin.

Accepted Answer

$$298 \ \mathrm{K}$$

Question 15

How many milliliters are in 5.9 L?

Accepted Answer

$$5,900 \ \mathrm{mL}$$

Question 16

How many grams are in 5,300 mg?

Accepted Answer

$$5.3 \ \mathrm{g}$$

Question 17

A company offers an hourly pay of $25.00/hour. If you work 50 weeks per year at 40 hours/week, what is your annual income?

Accepted Answer

$$50,000$$

Question 18

You need to purchase a large amount of a unique scented wax. One supplier offers $$5.99$$ per $$500$$ grams, and another offers $$10.00$$ per $$1$$ kilogram. Which supplier gives the better price per kilogram?

Accepted Answer

The first supplier ($$5.99$$ per $$500 g)$$

Question 19

Which of the following is the correct conversion for $$1$$ milliliter (mL) to liters (L)?

Accepted Answer

$$1 \ \mathrm{mL} = 0.001 \ \mathrm{L}$$

Introduction to Chemistry: Fundamental Concepts and Calculations

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