In my experiment, the starting temperature was 25F. I used KCl in my chemical reaction and
had an ending temperature of 35F. Was my
reaction exothermic or endothermic? How do
you know that?

Plz help me I don’t get it

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

The graph shows one consequence of urban sprawl. how did urban sprawl contribute to the change in biodiversity

Reacting masses1 calcium carbonate breaks down on heating to produce calcium oxide and carbondioxide gas.caco3 + cao + co2a student heats 15 g of calcium carbonate strongly in a crucible.relative atomic masses (a): ca = 40, c = 12, o = 16.calculate the mass of calcium oxide produced by this reaction.(5 marks)