No. of moles of Al2(SO4)3
= 0.03moles
Molarity of Al2(SO4)3
= 0.15M
Molarity of SO42- ions = 0.15 x 3
= 0.45M
Kipssben answered the question on August 15, 2018 at 11:23
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An oxide of silicon was found to contain 47% by mass silicon. What is the empirical formula of the oxide? (Si=28,O=16)
(Solved)
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Date posted:
August 13, 2018
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Answers (1)
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Date posted:
August 13, 2018
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Date posted:
August 13, 2018
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Answers (1)
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(Solved)
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Date posted:
August 13, 2018
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Answers (1)
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(Solved)
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Date posted:
August 13, 2018
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Answers (1)
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(Solved)
Rates and reactions:
A form 4 student carried out an experiment with 40 cubic centimeters of 1.0M hydrochloric acid and Marble chips in order to determine rates of reaction using the following steps.
??HCL was poured to a conical flask
??Conical flask was then placed on a weighing balance
??20 grams of marble chips was then added to acid and left for reaction to proceed
??With time, Changes in mass of flask with contents was recorded
(a) State other way in which one can measure rate of reacion(1mk)
(b)(i) Sketch curve that will be obtain if mass of contents in flask is plotted against time label it as (k) (2mks)
(ii) Using the same axes sketch curve that will be obtain if powdered marble had been used(1mk)
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Date posted:
August 13, 2018
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Answers (1)
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(Solved)
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Date posted:
August 2, 2018
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Answers (1)
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(Solved)
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Date posted:
July 25, 2018
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Answers (1)
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Date posted:
July 7, 2018
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Date posted:
July 7, 2018
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(Solved)
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Date posted:
July 5, 2018
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Answers (1)
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(Solved)
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Date posted:
July 4, 2018
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Answers (1)
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(Solved)
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Date posted:
July 4, 2018
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Answers (1)
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(Solved)
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Date posted:
July 1, 2018
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Answers (1)
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(Solved)
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Date posted:
June 24, 2018
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Answers (1)
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(Solved)
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Date posted:
June 24, 2018
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Date posted:
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Date posted:
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Date posted:
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Date posted:
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