Why does acids that has been accidentally spilled on a book cause the colour of the book cover and the ink to change?

How many joules of heat are evolved by a reaction in a calorimeter where the temperature of the bomb and the water increases from 19.50°C to 22.83°C? The bomb has a heat capacity of 650.0 J/°C, and the calorimeter contains 320.0 g of water.

Which of the following is NOT a possible end-product of a fermentation process? - glucose - carbon dioxide - lactic acid - ethanol

The chemical reaction 2 H2O + energy → 2 H2 + O2 is 1. a synthesis reaction. 2. an endothermic reaction. 3. an exothermic reaction. 4. an ionic reaction.

A piece of iron is heated with a torch to a temperature of 603 k.

Use the balanced equation from number four above to determine the limiting reactant if we had a mixture of 5.0 moles of Fe and 4.0 moles of O2.

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

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