Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

How is percent yield calculated?

1. A(Actual yield ÷ theoretical yield) × 100
2. BActual yield − theoretical yield
3. C(Theoretical yield ÷ actual yield) × 100
4. D(Mass of reactants ÷ mass of products) × 100

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

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

What is the chemical formula of carbon dioxide?

1. AC₂O
2. BCO₂
3. CCO₃
4. DCO

2 моль глюкози розчинили у воді, отримавши 4 літри розчину. Яка молярність?

1. A8 M
2. B0,5 M
3. C2 M
4. D4 M

Water can act as an acid in some reactions and as a base in others. What is such a substance called?

1. ASaturated
2. BIsotonic
3. CNeutral
4. DAmphoteric

Which statement describes a saturated fat?

1. AIts fatty acid chains have many carbon–carbon double bonds
2. BIt contains no carbon atoms
3. CIt is always liquid at room temperature
4. DIts fatty acid chains have no carbon–carbon double bonds

In the Bohr model, what happens when an electron drops from a higher energy level to a lower one?

1. AEnergy is absorbed from the surroundings
2. BThe electron leaves the atom
3. CThe atom gains a proton
4. DEnergy is released, often as light

Uranium-238 (atomic number 92) undergoes alpha decay. Which nucleus is formed?

1. AProtactinium-234 (atomic number 91)
2. BThorium-234 (atomic number 90)
3. CThorium-238 (atomic number 90)
4. DPlutonium-242 (atomic number 94)