## (solution) An apple has a mass of 297 grams. How many kilograms is this? A.

1. An apple has a mass of 297 grams. How many kilograms is this?

A. 0.297 kg

B. 29.7 kg

C. 2,970 kg

D. 297,000 kg

1. A student is trying to solve the following problem by selecting the tile shown. A container has a mass of 1.93 metric tons. What is the mass of the container in grams?

A. The student chose the wrong tile to solve the problem.

B. The student chose the correct tile, but needs to flip the tile to make the units cancel.

C. The student chose the correct tile, but needs to add a second tile to solve the problem.

D. There is nothing wrong. The problem is ready to be solved.

A pumpkin has a mass of 314 ounces.  What is the mass of the pumpkin in kilograms?

A. 0.0111 kg

B. 3.14 kg

C. 8.90 kg

D. 43.2 kg

The fastest animal in the world is the peregrine falcon. It is capable of diving after its prey at an amazing 83.00 meters per second. Use the tiles below to determine how fast this is in miles per hour.

A. 128.0 miles/hour

B. 185.7 miles/hour

C. 298.8 miles/hour

D. 371.1 miles/hour

1. How is 120,700 written in scientific notation?

• A. 120.7 ? 103
• B. 12.07 ? 104
• C. 1.207 ? 105
• D. 0.1207 ? 106

1. What number is equivalent to 6.75 ? 10-4?

• A. 0.000675
• B. 0.0675
• C. 6,750
• D. 67,500

1. A balance accurate to one-hundredth of a gram measures the mass of a rock to be 56.10 grams. How many significant digits are in this value?

• A. 2
• B. 3
• C. 4
• D. There is not enough information to answer this question.

In the calculation shown below, how many significant digits should the answer have?

• A. 1
• B. 2
• C. 3
• D. 4

A star is measured to be 18.9 light years from Earth. What is the correct answer in the calculation shown below? (Consider both significant digits and scientific notation.)

18.9 light years * 9.461*10 km/ 1 light year =
1. An apple has a mass of 297 grams. How many kilograms is this? (Note: You can use the

information in the table below to make a conversion factor.) o A. 0.297 kg o B. 29.7 kg o C. 2,970 kg o D. 297,000 kg 2. A student is trying to solve the following problem by selecting the tile shown. Which of the following statements is true? o A. The student chose the wrong tile to solve the problem. o B. The student chose the correct tile, but needs to flip the tile to make the units cancel.

o C. The student chose the correct tile, but needs to add a second tile to solve the problem.

o D. There is nothing wrong. The problem is ready to be solved. 3. Based on the tiles shown, how many meters per second is equivalent to 72 kilometers per

hour? o A. 0.27 m/s o B. 20. m/s o C. 36 m/s o D. 1,000 m/s 4. A pumpkin has a mass of 314 ounces. Based on the tiles below, what is the mass of the

pumpkin in kilograms? o A. 0.0111 kg o B. 3.14 kg o C. 8.90 kg o D. 43.2 kg 5. The fastest animal in the world is the peregrine falcon. It is capable of diving after its prey at

an amazing 83.00 meters per second. Use the tiles below to determine how fast this is in

miles per hour. o A. 128.0 miles/hour o B. 185.7 miles/hour o C. 298.8 miles/hour o D. 371.1 miles/hour 6. How is 120,700 written in scientific notation? o A. 120.7 ? 103 o B. 12.07 ? 104 o C. 1.207 ? 105 o D. 0.1207 ? 106 7. What number is equivalent to 6.75 ? 10-4? o A. 0.000675 o B. 0.0675 o C. 6,750 o D. 67,500 8. A balance accurate to one-hundredth of a gram measures the mass of a rock to be 56.10

grams. How many significant digits are in this value? o A. 2 o B. 3 o C. 4 o D. There is not enough information to answer this question. 9. In the calculation shown below, how many significant digits should the answer have? o A. 1 o B. 2 o C. 3 o D. 4 10. A star is measured to be 18.9 light years from Earth. What is the correct answer in the

calculation shown below? (Consider both significant digits and scientific notation.) o A. 1.8 ? 1014 o B. 1.79 ? 1014 o C. 17.9 ? 1013 o D. 17.88 ? 1013 11. Which set of diagrams shows a balanced chemical equation? o A. Diagram A o B. Diagram B o C. Diagram C o D. Diagram D 12. Which set of coefficients would balance the following equation?

Mg + AlCl3 Al + MgCl2 o A. 2Mg + AlCl3 o B. 3Mg + 2AlCl3 o C. Mg + 2AlCl3 o Al + 2MgCl2 D. 3Mg + 4AlCl3 2Al + 3MgCl2 2Al + MgCl2 4Al + 3MgCl2 13. Which set of coefficients would balance the following chemical equation?

H3PO4 + RbOH H2O + Rb3PO4 o A. 2H3PO4 + RbOH 3H2O + Rb3PO4 o B. H3PO4 + 3RbOH H2O + Rb3PO4 o C. H3PO4 + RbOH 2H2O + Rb3PO4 o D. H3PO4 + 3RbOH 3H2O + Rb3PO4 14. Silver (Ag) has a molar mass of 107.8682 g, nitrogen has a molar mass of 14.0067 g, and

oxygen has a molar mass of 15.9994 g. What is the molar mass of silver nitrate, AgNO3? o A. 169.8731 g o B. 413.6229 g o C. 137.8743 g o D. 197.8865 g 15. Why is the following equation invalid?

Al + 2O2 Al2O3 o A. An atom of aluminum (Al) is created in the reaction. o B. An atom of oxygen (O) is destroyed in the reaction. o C. The equation violates the Law of Conservation of Mass. o D. All of the above. 16. What coefficients would balance the following equation?

__Al + __O2 __Al2O3 o A. 2Al + 3O2 1Al2O3 o B. 2Al + 3O2 2Al2O3 o C. 3Al + 3O2 2Al2O3 o D. 4Al + 3O2 2Al2O3 17. What coefficients would balance the following equation?

__C2H6 + __O2 __CO2 + __H2O o A. 1C2H6 + 5O2 2CO2 + 3H2O o B. 2C2H6 + 5O2 4CO2 + 6H2O o C. 2C2H6 + 7O2 4CO2 + 6H2O o D. 2C2H6 + 10O2 4CO2 + 6H2O 18. Classify the chemical reaction shown here:

Mg + H2SO4 MgSO4 + H2 o A. Combination o B. Single replacement o C. Decomposition o D. Double replacement 19. Classify the chemical reaction shown here:

CaCO3 CaO + CO2 o A. Combination o B. Single replacement o C. Decomposition o D. Double replacement 20. Which of the following is an example of a double replacement reaction? o A. 3Fe + 2O2 Fe3O4 o B. BaCl2 + K2CO3 o C. NiCO3 o D. Cl2 + 2NaBr BaCO3 + 2KCl NiO + CO2 2NaCl + Br2

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Sep 13, 2020

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