Q: A patient weighs 146 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25.0 mg of drug per mL of solution. What volume of the drug should the patient receive? [1 pound = 454 g]

$$\frac{146\ \mathrm{lb} \times 454\ \mathrm{g/lb} \times \frac{1\ \mathrm{kg}}{1000\ \mathrm{g}} \times 45.0\ \mathrm{mg/kg}}{25.0\ \mathrm{mg/mL}} = 119\ \mathrm{mL}$$

Question 1

Which of the following best describes a chemical change?

Accepted Answer

Iron rusting in moist air

Question 2

Which of the following is an intensive property?

Accepted Answer

Density

Question 3

A sample of gold has a mass of 96.5 g and a volume of 5.00 cm$$^3. $$What is its density?

Accepted Answer

$$\frac{96.5}{5.00} = 19.3\ \mathrm{g/cm^3$}$$

Question 4

Which of the following is the correct formula for barium chromate?

Accepted Answer

BaCrO$$_4$$

Question 5

Which of the following compounds is named calcium chloride dihydrate?

Accepted Answer

CaCl$$_2$$ \cdot 2H$$_2O$$

Question 6

Which of the following is a homogeneous mixture?

Accepted Answer

Salt dissolved in water

Question 7

What is the correct name for H$$_2SO$_4$$?

Accepted Answer

Sulfuric acid

Question 8

Which of the following is the correct formula for sodium dihydrogen phosphate?

Accepted Answer

NaH$$_2PO$_4$$

Question 9

Which of the following is the correct empirical formula for glucose (C$$_6H$_{12}O$_6$$)?

Accepted Answer

CH$$_2O$$

Question 10

Which of the following is the correct formula for tin(II) phosphate?

Accepted Answer

Sn$$_3(PO$_4$$)$$_2$$

Question 11

Which of the following is the correct name for Fe$$_2(SO$_4$$)$$_3$$?

Accepted Answer

Iron(III) sulfate

Question 12

Which of the following is the correct formula for acetic acid?

Accepted Answer

CH$$_3$$COOH

Question 13

Which of the following is the correct formula for iodine pentoxide?

Accepted Answer

I$$_2O$_5$$

Question 14

Which of the following is the correct formula for lead(IV) sulfide?

Accepted Answer

PbS$$_2$$

Question 15

Which of the following is the correct formula for dichlorine heptoxide?

Accepted Answer

Cl$$_2O$_7$$

Question 16

A patient weighs 146 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25.0 mg of drug per mL of solution. What volume of the drug should the patient receive? [1 pound = 454 g]

Accepted Answer

$$\frac{146\ \mathrm{lb} 	imes 454\ \mathrm{g/lb} 	imes \frac{1\ \mathrm{kg}}{1000\ \mathrm{g}} 	imes 45.0\ \mathrm{mg/kg}}{25.0\ \mathrm{mg/mL}} = 119\ \mathrm{mL}$$

Question 17

Which of the following is an illustration of the law of constant composition?

Accepted Answer

Water is always 11% hydrogen and 89% oxygen by mass.

Question 18

Which of the following is the correct formula for ammonium acetate?

Accepted Answer

NH$$_4C$_2H$_3O$_2$$

Question 19

Which of the following is the correct formula for sodium thiosulfate?

Accepted Answer

Na$$_2S$_2O$_3$$

Question 20

Which of the following is the correct formula for carbon tetrachloride?

Accepted Answer

CCl$$_4$$

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