Question

1. when methane is burned with oxygen the products are carbon dioxide and water. if you produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how many grams of oxygen were needed for the reaction?

a) 64
b) 32
c) 96
d) 80
e) none of the above

1. which type of energy is associated with motion?

a) kinetic
b) electrical
c) potential
d) chemical
e) none of the above

1. how many joules are there in a 255 calorie snack bar?

a) 2.55 x 10⁵
b) 1.07 x 10⁶
c) 6.09 x 10⁴
d) 1.07x 10³
e) none of the above

1. the boiling point of water is

(1) 212°f (2) 0°c (3) 373 k
a) 1 and 3 only
b) 1 and 2 only
c) 2 and 3 only
d) all of 1, 2, and 3
e) none of 1, 2, and 3

1. what is the value of 27°c on the fahrenheit temperature scale?

a) -6.8
b) 106
c) 81
d) 300
e) none of the above

1. a 15.0 gram lead ball at 25.0°c was heated with 40.5 joules of heat. given the specific heat of lead is 0.128 j/g °c, what is the final temperature of the lead?

a) 21.1°c
b) 46.1°c
c) 0.844°c
d) 77.8°c
e) none of the above

Explanation:

Answer:

1. A) 64
2. A) kinetic
3. B) \( 1.07 \times 10^6 \)
4. A) 1 and 3 only
5. C) 81
6. B) \( 46.1^\circ\text{C} \)