解答つき看護学校入学試験のための化学ワークシート

原子核にある素粒子（原子を構成する粒子）はどれか。

1. A電子だけ
2. B電子と中性子
3. C陽子と電子
4. D陽子と中性子

What is the formula of sulfuric acid?

1. AH₂SO₄
2. BH₂SO₃
3. CHCl
4. DHNO₃

What is an empirical formula?

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

強酸を説明しているのはどれか。

1. ApHが 7 より大きい
2. B水中で完全に電離する
3. C水素イオンを一部しか放出しない
4. D常に濃度が高い

Why does ice float on liquid water?

1. AIce has a higher mass than the same volume of water
2. BIce is denser than liquid water
3. CIce contains trapped air from the freezer
4. DIce is less dense than liquid water

At 20 °C, about 36 g of NaCl dissolves in 100 g of water. If 50 g of NaCl is stirred into 100 g of water at 20 °C, what happens?

1. AAbout 36 g dissolves and about 14 g stays undissolved
2. BNone of the salt dissolves
3. CAll 50 g dissolves
4. DAbout 14 g dissolves and about 36 g stays undissolved

ある試料に水の分子が 3.01 × 10²³ 個含まれる。何 mol か。

1. A0.5 mol
2. B1.81 mol
3. C2 mol
4. D3.01 mol

A salt is dissolved in water in an insulated cup, and the water temperature falls from 25 °C to 20 °C. Which statement is correct?

1. ADissolving is exothermic; the dissolving salt released heat into the water
2. BDissolving is endothermic; the dissolving salt took heat from the water
3. CDissolving is endothermic; the water took heat from the salt
4. DNo energy change occurred, because the temperature fell