#69 a, b and c 67. How many grams of Cl are in 38.0 g of each sample of chlo-rofluorocarbons (CFCS)?(a) CF,Cl,(b) CFC13(c) CF;Cl3(d) CF;CI69. Iron is found in Earth's crust as several different iron com-pounds. Calculate the mass (in kg) of each compound thatcontains 1.0 X 10° kg of iron.(a) Fe,O3 (hematite)(b) Fe;O4 (magnetite)(c) FECO3 (siderite)MASS PERCENT COMPOSITION71. A 2.45-g sample of strontium completely reacts withoxygen to form 2.89 g of strontium oxide. Use this datato calculate the mass percent composition of strontium instrontium oxide.73. A1.912-g sample of calcium chloride is decomposed into itsconstituent elements and found to contain 0.690 g Ca and1.222 g Cl. Calculate the mass percent composition of Caand Cl in calcium chloride.75. Copper(II) fluoride contains 37.42% F by mass. Use thislulato

Molecular-Mass: Molecular mass is the sum of atomic masses of the elements present in a molecule. It…

Answered: Iron is found in Earth's crust as seve…

Iron is found in Earth's crust as seve pounds. Calculate the mass (in kg) c contains 1.0 X 10° kg of iron. (a) Fe,O3 (hematite) (b) Fe;O4 (magnetite) (c) FECO3 (siderite)

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.3PAE

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Question

#69 a, b and c

67. How many grams of Cl are in 38.0 g of each sample of chlo-
rofluorocarbons (CFCS)?
(a) CF,Cl,
(b) CFC13
(c) CF;Cl3
(d) CF;CI
69. Iron is found in Earth's crust as several different iron com-
pounds. Calculate the mass (in kg) of each compound that
contains 1.0 X 10° kg of iron.
(a) Fe,O3 (hematite)
(b) Fe;O4 (magnetite)
(c) FECO3 (siderite)
MASS PERCENT COMPOSITION
71. A 2.45-g sample of strontium completely reacts with
oxygen to form 2.89 g of strontium oxide. Use this data
to calculate the mass percent composition of strontium in
strontium oxide.
73. A1.912-g sample of calcium chloride is decomposed into its
constituent elements and found to contain 0.690 g Ca and
1.222 g Cl. Calculate the mass percent composition of Ca
and Cl in calcium chloride.
75. Copper(II) fluoride contains 37.42% F by mass. Use this
lulato

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