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mariarad [96]
3 years ago
15

The following is true about an index fossil:

Chemistry
1 answer:
finlep [7]3 years ago
4 0

Answer:

the 1st and 4th one. index fossils r imprints and also it is individual animals making the print so it is unique

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What is the mass in grams of 5.50 mol of sodium?
Zolol [24]

Answer:

126.5g

Explanation:

n=<u>m</u><u> </u>

M

where n is moles

m is mass of substance

M is molar mass

molar mass of sodium is 23g/mol

m=nM

m=5.5(23)

m=126.5

8 0
3 years ago
When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.​
Vinvika [58]

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Explanation:

A chemical change changes all of the element but some chemical changes but very few can be changed back to its original substance only with a chemical change.

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2 years ago
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