Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

Which element makes up the largest share of the human body by mass?

1. AOxygen
2. BHydrogen
3. CNitrogen
4. DCarbon

Which acid is found in the stomach?

1. AHydrochloric acid
2. BSulfuric acid
3. CNitric acid
4. DAcetic acid

Which element has the symbol Fe?

1. AFluorine
2. BFrancium
3. CIron
4. DFermium

How many molecules are in 2 mol of carbon dioxide?

1. A3,01 × 10²³
2. B6,02 × 10²³
3. C2,00 × 10²³
4. D1,20 × 10²⁴

How many grams are in 2,5 kg?

1. A25 g
2. B250 g
3. C0,0025 g
4. D2500 g

Water has a high specific heat capacity. How does this help the human body?

1. AIt makes water a poor solvent for salts
2. BIt makes the blood more acidic
3. CIt allows oxygen to dissolve in water more easily
4. DIt helps keep body temperature stable

Cotton soaked in ammonia (NH₃) and cotton soaked in hydrogen chloride (HCl) are placed at opposite ends of a glass tube. A white ring of ammonium chloride forms closer to the HCl end. What does this show?

1. ABoth gases diffuse at the same speed
2. BThe HCl molecules diffuse faster than NH₃ molecules
3. CThe lighter NH₃ molecules diffuse faster than HCl molecules
4. DThe white ring forms where the gases are heaviest

A sealed rigid can holds gas at 2 atm and 27 °C. It is heated to 327 °C. What is the new pressure?

1. A2,4 atm
2. B24 atm
3. C1 atm
4. D4 atm