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algol13
3 years ago
7

What is the best way to package and preserve a questioned document?

Chemistry
2 answers:
iren2701 [21]3 years ago
7 0
Plastic sheet protected
Zanzabum3 years ago
5 0
In a plastic sheet protector
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The atomic mass of a atom (in amu) is equal to
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1.67377x10-27 kilogram(kg) or 1.67377x 10-24 gram(g)
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3 years ago
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If atoms of a halogen nonmetal (Group 17) gains one electron, the atoms the have __.
RUDIKE [14]

Hm, this could be more than one option, but gaining electrons makes a negative charge, so

If atoms of a halogen nonmetal (Group 17) gains one electron, the atoms the have "a negative one charge".

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2 years ago
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(Yield Problem)
alex41 [277]

Answer:

Percent Yield Fe  =  82.5%

Explanation:

The actual yield is the value produced after an experiment is conducted. The theoretical yield is the value calculated using the balanced chemical equation and atomic/molar masses.

To find the percent yield of iron (Fe), you need to (1) convert grams Al to moles Al (via atomic mass), then (2) convert moles Al to moles Fe (via mole-to-mole ratio from equation coefficients), then (3) convert moles Fe to grams Fe (via atomic mass), and then (4) calculate the percent yield. It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the sig figs of the given values.

Atomic Mass (Mg): 24.305 g/mol

Atomic Mass (Fe): 55.845 g/mol

3 Mg + 2 FeCl₃ -----> 2 Fe + 3 MgCl₂

20.5 g Mg           1 mole              2 moles Fe            55.845 g
-----------------  x  -----------------  x  ----------------------  x  -----------------  =  
                           24.305 g           3 moles Mg             1 mole

=  31.4 g Fe

                                     Actual Yield
Percent Yield  =  ----------------------------------  x  100%
                                 Theoretical Yield

                               25.9 g Fe
Percent Yield  =  --------------------  x  100%
                               31.4 g Fe

Percent Yield  =  82.5%

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2 years ago
Are inner planets rockier or more like gas??
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Inner planets are rockier and outer planets are gaseous. Hope this helps! Can I have brainliest please
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