정답이 있는 간호학 입학 시험 대비 화학 학습지

According to the kinetic molecular theory, how do gas particles move?

1. ASlowly in fixed positions
2. BOnly when heated, and then in neat lines between the walls
3. CAlways in a single direction, set by the pull of gravity
4. DConstantly, randomly and in straight lines between collisions

어떤 원자가 양성자 6개, 중성자 6개, 전자 6개를 가지고 있습니다. 이 원자의 질량수는 얼마인가요?

1. A6
2. B18
3. C12
4. D0

DNA belongs to which group of biological molecules?

1. AProteins
2. BNucleic acids
3. CLipids
4. DCarbohydrates

Uranium-235 and uranium-238 both have 92 protons. How many more neutrons does an atom of uranium-238 have?

1. A92
2. B3
3. C0
4. D146

온도가 일정할 때 기체의 부피를 절반으로 줄였습니다. 압력은 어떻게 되나요?

1. A두 배가 된다
2. B4분의 1이 된다
3. C그대로이다
4. D절반이 된다

When the diaphragm contracts and the chest cavity gets bigger, what happens to the air pressure inside the lungs?

1. AIt falls, so air flows out
2. BIt rises, so air flows in
3. CIt falls, so air flows in
4. DIt does not change

What is the percentage by mass of nitrogen in ammonium nitrate, NH₄NO₃ (N = 14, H = 1, O = 16; molar mass 80 g/mol)?

1. A35%
2. B17.5%
3. C28%
4. D60%

A compound has the empirical formula CH₂ and a molar mass of 42 g/mol (C = 12, H = 1). What is its molecular formula?

1. AC₃H₆
2. BC₄H₈
3. CC₂H₄
4. DCH₂