120 students took a chemistry test. 22 scored a 90.55 scored an 80, 12 scored a

70, 11 scored a 60, and 20 scored a 50. Calculate the weighted average of the test

scores.

A compound used to generate O2 gas in the laboratory has mass percentage composition 31.91% K, and 28.93% Cl, the remainder being oxygen. What is the empirical formula of the compound?1. KClO2. KClO23. KClO34. K3ClO45. K2ClO3

What is the value of ΔG in a spontaneous reaction? A.) less than 0 B.) greater than 0 C.) equal to 0 D.) equal to 1

What should not be a part of scientific inquiry

Why is rusted iron an example of an oxidation-reduction reaction? electrons are exchanged?

Which term refers to an electrochemical cell that uses a spontaneous redox reaction to produce an electric current? electrolyte voltaic cell electrolytic cell cathode

You determine the volume of your plastic bag (simulated human stomach) is 1.05 L. How many grams of NaHCO3 (s) are required to fill this container given a 70.

If 3.00 g of limestone reacted, what mass of calcium chloride would be produced?

Which four quantities a, b, c and d are required to balance the equation ... aMgO (s) + bHCl (aq) = = > cMgCl2 (aq) + dH2O (l)

Find the number of moles of water that can be formed if you have 134 mol of hydrogen gas and 62 mol of oxygen gas

The amount of kinetic energy an object has depends on its. motion position gravity height