A 4.000 g sample of iron was heated from 0.0°C to 21.0°C. If it has a specific heat of 0.440 kJ/kg °C, how many kilojoules of heat does it absorb?

In three different experiments, the following results were obtained for the reaction A - > products: [A]o = 1.00M, t1/2=50 min; [A]o = 2.00M, t1/2 = 25 min; [A]o = 0.50M, t1/2 = 100 min.

A chemist makes a solution of NaOH for use in an experiment. She dissolves 0.00500 mol NaOH in 1.00 L H2O. The NaOH completely dissociates to form a solution with [OH - ] = 0.00500 M. What is the pOH of this solution

The wittig reaction involves coupling between a phosphonium ylide and a carbonyl-containing molecule. if a chemist wants to use the wittig reaction to synthesize 2-methyl-2-butene, which reactants should be used?

Which of the following statements about anabolic pathways is true? - They release energy by degrading polymers to monomers. They consume energy to build up polymers from monomers. They are usually spontaneous chemical reactions.

Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu (NO3) 2. An excess of AgNO3 is present. The balanced chemical equation is shown below. Cu + 2AgNO3 - - - > Cu (NO3) 2 + 2Ag The molar mass of Cu is 63.5 g/mol.

In testing the effectiveness of an antacid compound, 20.0g of Hydrochloric Acid is mixed with 28.0g of Magnesium Hydroxide.

Suppose you had 10 mol of NaCl and you dissolved it in exactly 3.00 kg of pure water (the solvent). What would be the molality of the solution in mol/kg?

how many neutrons are present in each of the tree elments you idenitifed in your chosen type steel? be sure to show calculations used arrive at answer

Using the table on the right, complete each calculation by typing in the correct answer. 13.2L=? mL

How many atoms are in a sample of 68.7 grams copper (Cu) ?