1. If the walls in a room are 955 square feet in area, and a gallon of paint cov

Question

1. If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft 1 yd) A) 47 gallons B) 21 gallons C) 7.1 gallons D) 24 gallons E) 2.3 gallons 2. If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? A) 1.0 kg Ca B) 5.1 kg Ca D) 5.1 x 102 kg 3. A fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean. Each barrel contains 42 gallons. If the oil film on the ocean is 2.5 x 102 nm thick, how many square meters will the oil slick cover? A) 1.9 x 10-3 m2 B) 1.9 x 106 m2 C) 1.9 x 107 m2 D) none of these 4. The recommended adult dose of Elixophyllin a drug used to treat asthma, is 6.00 mg/kg of body mass. Calculate the dose in milligrams for a 115-lb person. 1 lb 453.59 g. A) 24 B) 1,521 C) 1.5 D) 313 E) 3.1 x 105 5. The density of air under ordinary conditions at 25 C is 1.19 g/L. How many kilograms of air are in a room that measures 11.0 ft x 11.0 ft and has an 10.0 ft ceiling? 1 in. 2.54 cm (exactly); 1 L 103 cm3 A) 3.66 B) 0.152 c 4.08 x 104 D) 0.0962 E) 40.8

Explanation / Answer

Solved first four question, post multiple question to get remaining answers

1) Area of the Room = 955 square feet

1 yard = 3 feet

1 yards = 3 feet * 3 feet = 9 ft^2 area

Area of the Room in Yards = 955 ft^2 * 1 yards/9ft^2 = 106.111 yards^2

Number of gallons of Paint = 106.111/15 = 7.07 gallons

Hence the correct answer is Option C

2) 1 pound = 0.453592 Kg

Mass of man (in Kg) = 165 pound * 0.453592 Kg/1 pound = 72.5748 Kg

Mass of Calcium in Human Body = 1.4/100 * 72.5748 = 1.016 Kg

Correct answer is Option A

3) Amount of Oil Spread= 3.0 * 42 = 126 gallons

1 gallon = 0.00378541 m^3

Hence the volume of oil (in m^3) = 0.476962 m^3

0.47692 m^3 = 2.5 * 10^(-7) m * Area

Area = 1.90768 * 10^6 m^2

correct answer is Option B

4)

1 lb = 0.45359 Kg

Mass of person in Kg = 115 * 0.45359 Kg = 52.162 Kg

Amount of Dose in mg = 52.162 Kg * 6 mg/1Kg = 52.162 * 6 mg = 312.972 = 313 mg

Hence the correct answer is Option D

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