1.やさしい
水の化学式はどれか。
- AHO₂
- BOH
- CH₂O₂
- DH₂O
水の化学式はどれか。
What is the chemical formula of carbon dioxide?
What is the SI unit of energy?
A gas mixture contains nitrogen at 600 mmHg, oxygen at 150 mmHg and other gases at 10 mmHg. What is the total pressure?
Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?
What is the formula of the hydroxide ion?
What is the net ionic equation for the neutralisation of any strong acid by any strong base?
Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?
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