Which of the following reactions represents an exothermic reaction

A 2-column table with 3 rows. Column 1 is labeled Substance with entries upper O subscript 2, upper N subscript 2, upper C upper O subscript 2. Column 2 is labeled Molar mass with entries 32.00 grams per mole, 28.02 grams per mole, and, 44.

Which of the solutions below have the same molar concentration as solution x? check all that apply?

the reaction of magnesium with hydrochloric acid carried out in a calorimeter caused the temperature of water to change from 25.0 Celsius to 36.0 Celsius. In this reaction 3760J of energy was released. What mass of water was present?

Using lewis formulas, assign oxidation states to the atoms in these compounds. assume that sulfur is more electronegative than carbon.

What volume of a concentrated hcl solution, which is 36.0% hcl by mass and has a density of 1.179 g/ml, should be used to make 4.90 l of an hcl solution with a ph of 1.80?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?