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SVEN [57.7K]
2 years ago
12

1. Choose the correct answer from the given alternative. 1. A blood sample analysis showed that a total of 0.0000036g lead. Expr

ess it in micrograms? A. 0.0036 micro gram B. 0.036 micro grams C. 0.36 micro grams D. 3.6 micrograms.​
Chemistry
1 answer:
son4ous [18]2 years ago
5 0

Answer:

3.6 micrograms answers (c)

Explanation:

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All of the above are chemical reactions.
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cerium (iii) sulfate is less soluble

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1) How many moles are in 4.0x10^24 atoms?
-Dominant- [34]

Answer:

<h2>6.64 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

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From the question we have

n =  \frac{4 \times  {10}^{24} }{6.02 \times  {10}^{23} }   \\  = 6.644518...

We have the final answer as

<h3>6.64 moles</h3>

Hope this helps you

3 0
3 years ago
5pts. Chemistry multiple choice​
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