Which element makes up the largest share of the human body by mass?
- AOxygen
- BNitrogen
- CHydrogen
- DCarbon
Which element makes up the largest share of the human body by mass?
При какой температуре кипит чистая вода на уровне моря?
What is the molar mass of oxygen gas, O₂ (O = 16 g/mol)?
Что происходит с давлением газа, когда его нагревают в жёстком закрытом сосуде?
In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?
On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?
An unknown element is shiny, conducts electricity, and reacts vigorously with water to form a basic solution and hydrogen gas. In which group is it most likely?
Which pair of substances could form a buffer solution?
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