General Chemistry Answers

What is the boiling point in C° of a solution of a 2.15 m aqueous solution of glycerol ? (Kb = 0.512° C/m)

N2H4 (l) + CH4O (l) CH2O (g) + N2 (g) + 3H2 (g)

A silicon chip is an integrated circuit of a computer that has a mass of 6.5g. Determine:

a. the number of moles in the silicon chip; and

b. the number of silicon atoms in the chip

the chemical formula of washing soda is Na₂CO₃

a. what is the formula mass of washing soda?

b. what is the mass of 3.5 mol of washing soda?

c. how many formula units are there in 350g of washing soda?

Urea, (NH₂)₂CO, is an organic compound that is commonly used as fertilizer

a. What is the molecular mass of urea?

b. How many molecules are present in 350g of the compound?

c. How many molecules are there in 0.08 mole of urea?

d. what is the mass of 1.5 X 10⁸ molecules of urea?

A tablet of vitamin C, C₆H₈O₆, has a mass of 400mg. How many molecules are there in the tablet?

How many moles are there in 5 X 10¹² atoms of silver?

Arranged the following compounds according to increasing copper content: Cu₂O, CuCO_3, Cu₂SO_4, Cu(MnO₄)₂

How many grams of silver is present in 5.0g of silver chloride

A compound Q was found to be composed of 4.8g of element A and 6.4g of element B. What is the percentage composition of compound Q