General Chemistry Answers

1. Phosphorus (P₄) is prepared in an electric furnace according to the equation

2Ca₃(PO₄)₂ + 6SiO₂ + 10C —› 6CaSiO₃ + 10CO + P₄

a. How many moles of Ca₃(PO₄)₂ are needed to yield 15 moles of P₄?

b. How many moles of C are required?

c. How many grams of P₄ are formed?

d. Calculate the mass in grams of CaSiO₃ produced.

e. What mass (in grams) of CO are also formed?

1. Aspirin has the molecular formula C9H8O4. a. What is the % C in aspirin by mass in aspirin? B. What is the % O in aspirin by mass in aspirin?

A 20.0 mL solution of NaOH is neutralized with 32.5 mL of 0.200 M HBr. What is the concentration of the original NaOH solution?

Explain why the boiling point of water is higher than that of hydrogen sulphide

Considered the reaction:

3 NaOH(aq)+ FeCI3(s) →3 NaCI (aq) + Fe(OH)3 (s)

(molar mass: Fe(OH)3=106.84 g/mole; FeCI3=162.19 g/mol

2) what volume of 1.6M NaOH will react with 33.0g of FeCI3

3. What is the concentration of 22.50 mL of NaOH if this was neutralized with 20.50 mL of 0.150 M HCI in the following reaction

Describe the metal-chelating antioxidant activity of quercetin. 

A chemist burned 150.0 g of C3H8 in the presence of 300.0 g of O2 and obtained 210.43 g of CO2. What is the percent yields of the combustion reaction?

Two pans of water are on different burners of a stove. One pan of water is boiling vigorously, while the other is boiling gently. What can be said about the temperature of the water in two pans?

Find the mass percent of concentration of a solution containing 19 g of solute and 0.158 kg of solvent.

Calculate the molarity of KCI containing 0.22mol of KCI in a 455 ml of solution