A cheeseburger from a fast food restaurant contains 19 g of fat, 20. g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The caloric values for foods are 9.0 kcal/g for fat, 4.0 kcal/g for carbohydrate, and 4.0 kcal/g for protein.) Round off the answer for each food type to the tens place. A) 70. kcal B) 630 kcal C) 17 kcal D) 360 kcal E) 280 kcal How many calories are required to raise the temperature of a 150. g sample of gold from 25 *C to 175 C? The specific heat of gold is 0.0308 cal/g C. A) 693 cal B) 116 cal C) 22500 cal D) 4.62 cal E) 130 cal A person has 18% body fat by mass. If this person weighs 180 lb, what is the mass, in kilograms, of body fat? A) 11 kg B) 15 kg C) 70 kg D) 32 kg Which of the following is the correct Lewis structure of N (nitrogen gas)? A) N-N B) NEN C) NEN D) N=N The number of water molecules (density 1.00g/mL) present in a drop of water (volume 0.0018 ml) at room temperature is A) 1.568 x 10 B) 6.023 x 109 C) 4.84 x 107 D) 6.023 x 1023 What is the symbol for the ion with 19 protons and 18 electrons? A) K B) K C) F D) Art E) F*