Na2CO3 + CO2 + H2O → NaHCO3

1. Which of the following coefficients would correctly balance the

chemical reaction shown above?

A. 1,2,3,4

B. 1,1,1,2

C. 2,1,1,1

D. 2,2,3,1

Which mix will be homogeneous? A. mixing salt and sand B. mixing food coloring and water C. mixing water and vegetable oil D. mixing carbon dioxide and water

Suppose you were given a substance and asked to determine weather or not it was a plasma. Write the characteristics you would look for to identify the substance.

Consider a hydrogen atom in the ground state. What is the energy of its electron? which is, - 2.1799 X10^-18 J Now consider an excited-state hydrogen atom. What is the energy of electron in the n=2 level?

2 h2o (g) 2 h2 (g) + o2 (g) kp = 7.8 * 10-16 at 930 k. give the value of kp for this reaction, if it is written as: 1/2o2 (g) + h2 (g) h2o (g)

1. While cooking, if the bottom of the vessel is getting blackened on the outside. it means that (a) the food is not cooked completely. (b) the fuel is not burning completely. (c) the fuel is wet. (d) the fuel is burning completely.

Refrigerators are usually kept at about 5°C, while room temperature is about 20°C. If you were to take an ""empty"" sealed 2-liter soda bottle at room temperature and place it in the fridge, would you expect it to contract to one-fourth its original

You want to analyze a cadmium nitrate solution. what mass of naoh is needed to precipitate the cd2 + ions from 32.7 ml of 0.499 m cd (no3) 2 solution?

How much is 35° C in F?

Which describes a precipitate in a chemical reaction? a a gaseous product formed from aqueous reactants b a solid reactant that forms aqueous product c a gaseous reactant that forms aqueous products d a solid product formed from aqueous reactants

Prepare a solution that is 0.1 M acetic acid and 0.1 M sodium acetate by measuring out 5.0 mL of the 1.0 M acetic acid solution and 5.0 mL of the 1.0 M sodium acetate solution in a 100 mL graduated cylinder, diluting the 10.