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lakkis [162]
3 years ago
12

Name 2 gram negative bacteria often found in contaminated food

Chemistry
1 answer:
Alex17521 [72]3 years ago
6 0
E. coli and Salmonella spp.
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How many formula units of silver fluoride, AgF, are equal to 42.15 g f this substance?
s2008m [1.1K]

Answer:

1.99 x 10²³ formula units

Explanation:

Given parameters:

Mass of AgF  = 42.15g

Unknown:

The amount of formula units

Solution:

To solve this problem, we set out by find the number of moles in this compound from the given mass.

   Number of moles  = \frac{mass}{molar mass}

molar mass of AgF  = 107.9 + 19  = 126.9g/mol

  Number of moles  = \frac{42.15}{126.9}   = 0.33 moles

       1 mole of a substance =  6.02 x 10²³ formula units

         0.33 moles of AgF  = 0.33 x 6.02 x 10²³  = 1.99 x 10²³ formula units

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Explanation:

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