1 mole of CO2 weighs 44g
44g of CO2 contains 12g of c
? 1.32 of CO2 will contain 12/44×1.32
= 0.36g of C
1 mole of H2O weighs 18g
18g of H2O weigh 18g
? 0.54g of H2O will contain 2 ×0.54 = 0.06 of H
18
Element C H
Mass 0.36 0.06
Moles 0.36 0.06
12 1
: 2
Empirical form = CH2
Lywascomputers answered the question on August 19, 2018 at 18:24
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Study the following information and answer the question that follows
(Solved)
Study the following information and answer the question that follows.
Heat of hydration of x2+ = -1480 kJ/mol
Heat of hydration y- = -364 kJ/mol
Lattice energy of XY2 = +2112 kJ/mol
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Date posted:
August 19, 2018
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Answers (1)
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(Solved)
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August 19, 2018
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(Solved)
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Date posted:
August 19, 2018
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(Solved)
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Date posted:
August 19, 2018
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Answers (1)
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(Solved)
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Date posted:
August 19, 2018
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Answers (1)
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(Solved)
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Date posted:
August 19, 2018
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Answers (1)
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(Solved)
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What two properties should the components of a mixture have that would make the separation possible
Date posted:
August 19, 2018
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Answers (1)
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(Solved)
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Identify the anion and cation in the green solid.
Date posted:
August 18, 2018
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Answers (1)
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(Solved)
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Date posted:
August 18, 2018
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(Solved)
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Date posted:
August 17, 2018
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Answers (1)
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Date posted:
August 17, 2018
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Answers (1)
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(Solved)
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Date posted:
August 16, 2018
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(Solved)
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Date posted:
August 15, 2018
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Answers (1)
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(Solved)
An oxide of silicon was found to contain 47% by mass silicon. What is the empirical formula of the oxide? (Si=28,O=16)
Date posted:
August 13, 2018
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Answers (1)
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Determine the number of moles in 13.5 g of aluminium (Al =27)
(Solved)
Determine the number of moles in 13.5 g of aluminium (Al =27)
Date posted:
August 13, 2018
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Answers (1)
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(Solved)
Calculate the mass of 0.4 moles of calcium (Ca =40)
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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A form 4 student carried out an experiment with 40 cubic centimeters of 1.0M hydrochloric acid and Marble...
(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)
(c) Write a chemical equation to show how reaction proceed (1mk)
Date posted:
August 13, 2018
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Answers (1)
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Explain how a mixture of sulphur and sodium chloride can be separated into solid sulphur and sodium chloride
(Solved)
Explain how a mixture of sulphur and sodium chloride can be separated into solid sulphur and sodium chloride
Date posted:
August 2, 2018
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Answers (1)