What is the pH of a solution with = 7.5 × 10⁻⁹ M?
In the reaction below, which species acts as the base? HCl(a…
In the reaction below, which species acts as the base? HCl(aq) + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq)
As [H⁺] increases, pH increases.
As increases, pH increases.
A gas mixture has a total pressure of 950 torr. If oxygen co…
A gas mixture has a total pressure of 950 torr. If oxygen contributes 410 torr, what is the partial pressure of the other gas?
A sample of gas is kept at constant temperature. If the volu…
A sample of gas is kept at constant temperature. If the volume of the gas is decreased, what happens to the pressure of the gas?
The following reaction BEST represents a balanced equation f…
The following reaction BEST represents a balanced equation for the reaction of nitrogen gas with hydrogen gas to produce ammonia? N2 + 3 H2 → 2 NH3
A system releases 41.0 kJ of heat while doing 9.5 kJ of work…
A system releases 41.0 kJ of heat while doing 9.5 kJ of work on the surroundings. What is ΔE?
The combustion of butane is represented by the equation belo…
The combustion of butane is represented by the equation below: 2 C₄H₁₀(g) + 13 O₂(g) → 8 CO₂(g) + 10 H₂O(g) ΔHrxn = −2877 kJ What does the value of ΔHrxn = −2877 kJ indicate?
A substance with a higher specific heat requires less energy…
A substance with a higher specific heat requires less energy to change its temperature than a substance with a lower specific heat.
If a reaction absorbs heat, the surroundings experience a te…
If a reaction absorbs heat, the surroundings experience a temperature decrease.