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swat32
2 years ago
9

Solve the 3 questions

Chemistry
1 answer:
Dmitrij [34]2 years ago
5 0

Answer:

what kind of math is this

Explanation:

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Write the number 345 in scientific notation, with the same number of significant figures:
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3.45 x 10^2

Explanation:

345= 3 SF

3.45 x 10^2= 3 SF

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A crime scene investigator is called in to evaluate a crime scene. The victim is lying on the floor with no apparent trauma. Wha
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?A scientist is investigating how the lunar cycle affects the number of sea turtles nesting each night. Which of the following i
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2 years ago
A square painting has a length of 62 cm.<br><br> What is the area of the painting?<br><br> cm²
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3 0
2 years ago
Which of the following has a mass of 10.0 g?
Serjik [45]

Answer:

a.  0.119mol Kr

Explanation:

To solve this problem, we must understand that;

     Mass  = number of moles x molar mass

Molar mass of Kr  = 83.3g/mol

                        Ar = 40g/mol

                        He = 4g/mol

                        Ne = 20.18g/mol

a0.119 mol Kr               mass  = 0.119 x 83.3 = 9.9g

b 0.400 mol Ar             mass  = 0.4 x 40  = 16g

C 1.25 mol He               mass  = 1.25 x 4  = 5g

d 2.02 mol Ne              mass  = 2.02 x 20.18  = 40.8

Krypton is the answer

5 0
2 years ago
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