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Genrish500 [490]
3 years ago
11

Two or more different atoms are combined in definite proportions in any.

Chemistry
1 answer:
Stels [109]3 years ago
3 0
<span>That would be compound!
Compounds are pure substances, which consists of two or more elements chemically combined in a fixed proportion by mass. Compounds have definite proportion.</span>
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Answer:

68.3%

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1 mole of MgCl2 is required to precipitate 2 moles of Ag completely from the solution. That is a ratio of 1 to 2.

Now, mole of MgCl2 used to precipitate all the Ag

             = molarity x volume

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                         = 0.0063291 mole

Since 1 mole of MgCl2 would always require 2 moles of Ag, 0.0063291 mole will therefore require:

      0.0063291 x 2 = 0.0126 mole of Ag

This means that 0.0126 mole of Ag is present in stephanie.

Mass of silver in stephanie = mole x molar mass

                              = 0.0126 x 107.8682

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Thus, 1.365 g of silver is present in 2.00 g sample of stephanie.

Mass percent of silver in stephanie = 1.365/2.00 x 100

                                         = 68.25% = 68.3% to the correct number of significant figure.

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