A blown-up balloon is put in a freezer. What happens to its volume?
- AIt stays exactly the same
- BIt decreases
- CThe balloon bursts
- DIt increases
A blown-up balloon is put in a freezer. What happens to its volume?
An instant cold pack feels cold when the substance inside dissolves. How is this dissolving process classified?
What is an alloy?
Water climbs up a narrow glass tube. Which property mainly causes this?
Water can act as an acid in some reactions and as a base in others. What is such a substance called?
吸熱過程を説明しているのはどれか。
100 mL of 1 M NaCl is mixed with 100 mL of 3 M NaCl. What is the concentration of the mixture?
A compound has the empirical formula CH₂ and a molar mass of 42 g/mol (C = 12, H = 1). What is its molecular formula?
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