When a substance is dissolved in water, heat energy is released if: A) the latti

Question

When a substance is dissolved in water, heat energy is released if: A) the lattice energy is positive B) the hydration energy is positive C) the hydration energy is more negative than the lattice energy is positive D) the hydration energy is less negative than the lattice energy is positive E) none of these

Which of the following statements describes the correct method of preparation of 1.00 L of a 2.0 M urea solution?   urea = 60.06 g/mol A) Dissolve 120 g of urea in 1.00 kg of distilled water. B) Dissolve 120 g of urea in 880 g of distilled water. C) Dissolve 120 g of urea in enough distilled water to produce 1.00 L of solution. D) Dissolve 120 g of urea in 1.00 liter of distilled water. E) The density of urea is needed in order to do this calculation

Explanation / Answer

my answer is

Q1) the hydration energy is positive

Q2) Dissolve 120 g of urea in 880 g of distilled water

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