Chemistry Answers

Describe the effect on pH (increase decrease or no change) that results from each of the following additions:

a. Potassium acetate to an acetic acid solution

b. Ammonium nitrate to an ammonia solution

C. Sodium formate to a formic acid solution

D. Potassium chloride to a hydraulic acid solution

E. Barium iodide to a hydroiodic acid solution

The pkas of two monoprotic acods HA and HB are 5.9 and 8.1 respectively. Which of the two is the stronger acid?

Romeo, an alcoholic man, made an aqueous solution of HCl that contains 42 % HCl by mass. (Note that an aqueous solution is water that contains one or more dissolved substances. Because the solution is 42% HCl, it contains 42g HCl and 58g H2O.) calculate the mole fraction and molality

What mass of lead (II) iodide will be formed when 20.0 g of lead (II) nitrate is added to 33.0 g of potassium iodide?

How many grams of Ag₂ CrO4 will precipitate when 86ml of 0.2 molar Ag₂Cro, is added to 500ml of 6.3 molar K₂ CrO4? Molar mass of Ag₂ CrO4 = 331.74 g/mol

Balanced Equation: 2AgNO3 + K₂CrO4 Ag₂ CrO4 + 2KNO3

I am struggling with ionic bonds. If we look at the carbonate compound, we see it consists of 1 carbon atom and 3 oxygen atoms. Yet, it has 2 more electrons than protons and that is what makes it a negative ionic compound. But why does it have TWO more electrons than protons if there are THREE oxygen atoms, contributing ONE electron each? Shouldn't it have THREE more electrons than protons?

1,Lisa consumes a total of 8700 kilojoules per day and her diet consists of 55% of carbohydrates. Calculate the quantity of carbohydrates that her diet provides per day in grams and choose the correct answer.

a.81 g

b.4785kJ

c.281 g

d.106 g

2.Mr Naidoo consumes 157 g of carbohydrates, 107 g of fat and 238 g of protein per day. Calculate the energy provided by each of the energy-yielding nutrients.

a.Protein = 238kJ; Carbohydrates = 157kJ and Fat = 107kJ

b.Protein = 4046kJ; Carbohydrates = 2669kJ and Fat = 4066kJ

c.Protein = 4046kJ; Carbohydrates = 2669kJ and Fat = 1819kJ

d.Protein = 4046kcal; Carbohydrates = 2669kcal and Fat = 4066kcal

describe the purine bio synthesis

what is the symbol for the lithium ion in lithium chloride

i need to make a solution of combined citric acid and sodium citrate in 1 liter distilled water ( CA/SC ) . I am told that i need it to zero mol … i already have the citric acid and the sodium citrate each separately . How many grams to put of each to get a zero mol solution of both ? thank you