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

Elements in the same period of the periodic table have the same number of what?

1. AProtons
2. BValence electrons
3. CNeutrons
4. DOccupied electron shells

What is an empirical formula?

1. AThe simplest whole-number ratio of atoms in a compound
2. BThe mass of one mole of a compound
3. CA drawing of how the atoms are bonded
4. DThe actual number of each atom in one molecule

Що таке моль у хімії?

1. AМаса в грамах рівно одного атома вуглецю-12 за шкалою
2. BКількість протонів в атомі
3. CОб'єм одного літра будь-якого газу
4. DКількість речовини, що містить 6,02 × 10²³ частинок

Potassium forms K⁺ ions and sulfur forms S²⁻ ions. What is the name and formula of their compound?

1. APotassium sulfite, KS
2. BPotassium sulfide, KS₂
3. CPotassium sulfate, K₂SO₄
4. DPotassium sulfide, K₂S

How should the volume of water in a graduated cylinder be read?

1. AFrom above the cylinder, at the top edge of the curved surface
2. BFrom below, at the highest point the water touches the glass
3. CAt eye level, from the bottom of the curved surface (meniscus)
4. DAt any angle, from the middle of the cylinder

What is the shape of a water molecule?

1. ABent
2. BTetrahedral
3. CFlat triangle
4. DLinear

Which list puts 0,1 M solutions of HCl, acetic acid (CH₃COOH) and NaCl in order of increasing pH?

1. ACH₃COOH < HCl < NaCl
2. BNaCl < CH₃COOH < HCl
3. CHCl < NaCl < CH₃COOH
4. DHCl < CH₃COOH < NaCl

Hyperbaric oxygen therapy places a patient in a chamber with oxygen at higher than normal pressure. Why does this raise the oxygen dissolved in blood plasma?

1. AHigher pressure turns the oxygen into a liquid
2. BHigher pressure makes red blood cells divide faster
3. CHigher pressure lowers body temperature, so the blood can hold much more gas
4. DGas solubility in a liquid increases with the partial pressure of the gas