1.쉬움
What should a student always wear to protect the eyes when working with chemicals?
- AContact lenses
- BSafety goggles
- CSunglasses
- DReading glasses
What should a student always wear to protect the eyes when working with chemicals?
주기율표의 세로줄을 무엇이라고 하나요?
What is the formula of sulfuric acid?
Which gas forms when hydrochloric acid reacts with calcium carbonate?
기체 분자 운동론에 따르면 온도는 무엇을 나타내나요?
When diluting a concentrated acid, which method is safe?
가장 극성이 큰 결합은 어느 것인가요?
Orange bromine water is shaken with two hydrocarbons. With hexene it turns colourless; with hexane it stays orange. What does this show?
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