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What is the oxidation number of P in H3PO2?
How many electrons are required in the balanced half-reaction for the reduction of chromate ions to chromium (III) ions in basic solution?
Name and describe briefly two common techniques that are used in the laboratory to identify genetic and infectious diseases? [2 marks each].
Write maximum 5-10-line response.
Determine the number of moles in 134.3 grams of copper(II) sulfate.
a mixture of 4 substance A,B,C and D. A is soluble salt B is also soluble and can also sublime C is magnetic and has a high melting point and boiling point and its insoluble.D is insoluble and does not sublime and not magnetic with high boiling point describe how to separate and collect each salts and give your right steps
a mixture of 4 substance A,B,C and D. A is soluble salt B is also soluble and can also sublime C is magnetic and has a high melting point and boiling point and its insoluble.D is insoluble and does not sublime and not magnetic with high boiling point describe how to separate and collect each salts and give your right steps
A beaker contains 11.30 M osimium (lll) fluoride in 0.0673 liters of solution. How many grams of osimium (lll) fluoride are dissolved in this solution?
A 25.00 mL sample of hydrochloric acid was titrated with 0.7425 M sodium hydroxide. A total of 21.24 mL of the base was required to reach the equivalence point.
a) Write a balanced molecular equation for this reaction?
b) What was the concentration of the hydrochloric acid?
A 25.00 mL sample of nitric acid was titrated with 0.6440 M strontium hydroxide. A total of 10.22 mL of the base was required to reach the equivalence point.
a) Write a balanced molecular equation for this reaction?
b) What was the concentration of the nitric acid?
For the reaction A + B → C + D, the following initial rates of reaction were found. What is the
rate law for this reaction?
Expt [A],M [B],M Initial Rate, M min -1
1 0.50 0.50 4.2 x10 -3
2 1.50 1.50 1.3 x10 -2
3 3.00 3.00 5.2 x10 -2
