utexas2

What is the proper solution to the following equation? (27.9 ÷ 4.0) − 7.6134 + 11.431 = 1. 10.8 2. 10.7926 3. 11 4. 10.79

1. 10.8

The units of area could be 1. m2. 2. m3. 3. m. 4. m4.

1. m2.

When diluting an acid, always pour 1. the acid into the water. 2. the base into the water. 3. the water into the base. 4. the water into the acid.

1. the acid into the water.

The metric system of measurement is based on units of 1. log 10. 2. 10. 3. 1. 4. 100. 5. 1000.

2. 10.

Which answer is expressed to the nearest mil- ligram? 1. 14.72 g 2. 14.721 g 3. 14.7213 g 4. 14.7 g

2. 14.721 g

The measurement 3.2 × 10−3 g could also be written as 1. 3.2 pg. 2. 3.2 mg. 3. None of these 4. 3.2 g. 5. 3.2 kg.

2. 3.2 mg.

Which of the following rules for determining significant digits is FALSE? 1. Zeroes between significant digits are sig- nificant. 2. All final zeroes are significant. 3. You never start counting significant digits until you reach the first nonzero digit. 4. All nonzero digits are significant.

2. All final zeroes are significant.

Express the number 0.0006584 in scientific notation to 3 significant figures. 1. 6.59 × 10−4 2. 6.58 × 10−3 3. 6.58 × 10−4 4. 6.580 × 10−4

3. 6.58 × 10−4

How many kg are in 10.0 mg? 1. 1.00 × 10−4 kg 2. 1.00 × 10−7 kg 3. 1.00 × 10−3 kg 4. 1.00 × 10−5 kg 5. 1.00 × 10−6 kg Explanation:

4. 1.00 × 10−5 kg

In a measurement, which digit(s) is/are an approximation? 1. only those in proper scientific notation 2. first 3. no digit is uncertain 4. last

4. last

What is the proper solution to the following equation? (151.1 + 2.45 + 3.675)÷(0.660 + 0.3470) = 1. 1.5613 × 102 2. 1.56 × 102 3. 1.56132 × 102 4. 2×102 5. 1.561321 × 102 6. 1.5613207 × 102 7. 1.5 × 102 8. 1.561 × 102

8. 1.561 × 102