Question 5) Give the name and symbol of three elements that exist as diatomic molecules

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Question 5) Give the name and symbol of three elements that exist as diatomic molecules.

Question 6 

What is the molar mass of aluminum oxide, Al₂O₃?

Question 7 

What is the mass of 5.80 mol of carbon tetrachloride, CCl₄? The molar mass of carbon tetrachloride is 153.81 g/mol.

Question 8 

A chemist wants to make 100 mL of a standard solution. The chemist first dissolves the weighed quantity of solute in about 50 mL of water in a beaker, stirring with a stirring rod. The chemist then transfers this solution to a 100 mL volumetric flask. What should the chemist do before filling the volumetric flask to the volume mark and why?

Question 9 

What mass of potassium iodide, KI, is present in 2.00 L of 1.250 mol/L KI(aq)?show calculations

Question 10

What mass of silver nitrate, AgNO₃, is needed to make 500.0 mL of 0.600 mol/L AgNO₃(aq)? show calculations