The volume occupied by 0.4 g of hydrogen gas at s.t.p. is? [H = 1. 00; Molar volume at s.t.p. = 22.4 dm³]
A. 2.24 dm³ B. 4.48 dm³ C. 22.4 dm³ D. 44.8 dm³ Correct Answer: Option B B. 4.48 dm³When a substance changes directly from the solid state to the gaseous state without forming a liquid, the substance is said to?
A. condense B. evaporate C. sublime D. precipitate Correct Answer: Option C C. sublimeConsider the following reaction equation: CaCO3(s) + 2HCI(aq) → CaCl2(aq) + H2O(l) + CO2(g). What mass of CaCI2 would be obtained when 25.0g of CaCO3(s) is reacted with excess HCI(aq)? [CaCO3 = 100; CaCI2 = 111]
A. 4.00g B. 4.44 g C. 18.9 g D. 27.8 g Correct Answer: Option D D. 27.8 gMgO does not readily dissolve in water because?
A. of its high melting point B. it is a covalent compound C. it forms a hydroxide when dissolved in water D. its lattice energy is higher than its hydration energy Correct Answer: Option D D. its lattice energy is higher than its hydration...Products
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