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950 J of energy is used to heat an unknown mass of copper from 20.0° C to 95.0° C. The specific heat of copper = 0.39 J/(g·°C). What is the mass of the copper?

A solution is formed by dissolving 83.2 grams of copper II chloride (CuCl2) in 2.5 liters of water. The molar mass of CuCl2 is 134.45 g/mol. What is the molarity of the solution?

What happens when there is an increase in temperature for a reaction rate? Select all that apply. It increases the chance that the reaction will be endothermic It increases the percentage of collisions that result in a reaction It increases the total numb...

Study the following equation. Fe(s) + 2 HCl(aq) → H2(g) + FeCl2(aq) What happens to the iron metal when it is reacted in a closed container to produce hydrogen gas in this manner? Select all that apply. The rate of the reverse reaction increases as hydrog...

Study the reaction. H2SO4(l) + CaCO3(s) ⇌ CO2(g) + H2O(l) + CaSO4(aq) Which of the following would cause the equilibrium to shift, producing more carbon dioxide gas? Select all that apply. removing water from the system removing H2SO4 from the system remo...

.25?

does that sound right??