Chemistry Answers

PRACTICE 1

1. What is the percent yield if 5.50 grams of hydrogen where used in a reaction that only produced 20.4 grams NH₃?

3H² + N² □ 2 NH₃

1. explain the industrial application of double alkali solution.
2. why do we use two indicators in double alkali(i-e phenolphthalein and methyl orange)

how to make double alkali and what is a double alkali

what is double alkali

What is the hydronium ion concentration of 1g of acetic acid in 100 ml of water?

What weight of lactic acid must be dissolved in a liter of solution to produce a hydronium-ion concentration of 1×10^-5

On complete combustion, 0.246 g of an organic compound gave 0.198 g of CO2 and 0.1014 g of H2O. What is the ratio of carbon and hydrogen atoms in the compound?

3 grams of Aluminum are reacted with 4 grams of Copper (II) sulfate to produce Aluminum sulfate

and the metal copper.

a) Which is the limiting agent?

b) How many grams of copper are formed

How many grams of CO2 are produced when 100 g C4H10 undergoes combustion with 200 g O2?

Use the following molar masses: C4H10=58g/mol, O2=32 g/mol and CO2=44g/mol.

Compare the moles of product formed from each reactant.

Q about multiple dilutions - I have 9L of old motor oil; I replace 7L with new oil and mix. Then I replace 4.5L with new oil again. What is the final dilution of old oil remaining in the final 9L?