What would the specific heat of an unknown substance be if we applied 400 J of heat to a sample of 230 g with a 40°C change in temperature? Round your answer to have TWO decimal places.

Which statement justifies that phosphine (ph3) is a polar molecule?

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.