Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Between which kinds of elements do ionic bonds usually form?

1. ATwo identical metals
2. BTwo noble gases
3. CTwo nonmetals
4. DA metal and a nonmetal

What is a dilute solution?

1. AOne in which the solute has reacted with the solvent
2. BOne with a small amount of solute in a lot of solvent
3. COne with no solvent at all
4. DOne with a large amount of solute in a little solvent

Chlor, brom i jod są przykładami której grupy?

1. AMetali przejściowych
2. BLitowców
3. CFluorowców
4. DGazów szlachetnych

A red blood cell is placed in pure water (a hypotonic solution). What happens?

1. AWater leaves the cell, which shrinks and wrinkles
2. BNothing happens to the cell
3. CSalt enters the cell, which shrinks
4. DWater enters the cell, which swells and may burst

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 does not change
3. CIt rises, so air flows in
4. DIt falls, so air flows in

What is the formula of the hydroxide ion?

1. AO²⁻
2. BH₃O⁺
3. COH⁻
4. DOH⁺

A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?

1. A60%
2. B48%
3. C125%
4. D80%

Zbilansuj __Fe + __O₂ → __Fe₂O₃ najmniejszymi liczbami całkowitymi. Jakie są współczynniki?

1. A2, 3, 1
2. B4, 3, 4
3. C2, 1, 1
4. D4, 3, 2