What is the molar mass of oxygen gas, O₂ (O = 16 g/mol)?
- A8 g/mol
- B32 g/mol
- C48 g/mol
- D16 g/mol
What is the molar mass of oxygen gas, O₂ (O = 16 g/mol)?
A cleaning solution has a pH of 12. How is it described?
Which technique is used to separate the different coloured dyes in an ink?
How many oxygen atoms are in one formula unit of calcium nitrate, Ca(NO₃)₂?
Какое утверждение описывает сильную кислоту?
How many moles of gas are in 44,8 L at STP (0 °C and 1 atm)?
A solution contains 250 mg of a substance in every 5 mL. How many grams of the substance are in 100 mL?
What is the formula of calcium phosphate, made from Ca²⁺ and PO₄³⁻ ions?
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