Other Chemistry Answers

Identify 15 skills which are important and will be further developed in studying physical science

State three specific aims of the NS senior phase and justify the merging of the learning areas in Senior phase

A highway engineer is researching de-icing compounds for clearing ice from streets in winter. She wants a compound that has +2 ions and -1 ions in it. Which would work? *

Using the solubility curve answer the following question.

6. Describe which of the following is unsaturated saturated or supersaturated? All solutions are prepared from 100 g of water.

a. 60 g KCl at 60oC

b. 60 g K2Cr2O7 at 90oC

c. 60 g Pb(NO3)2 at 25oC

Using the solubility curve answer the following question:

5. What mass of the solute will dissolve in 100 g water of the following temperatures?

a. NaNO3 at 10oC

b. K2Cr2O7 at 30oC

c. NaCl at 50oC

How many grams of sample containing Cl should be taken

for analysis so that the % Cl in the sample can be obtained by

multiplying the weight of AgCl by 10? Ans: 2.474 g

Calculate the mole fraction of each component in this solution (Zinc Oxide = 12.90 g, Benzoic Acid = 4.50 g, Sulfur = 3.40 g, Salicylic Acid = 1.87 g). Consider a 100 g formulation mass of the solution.