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Alexxandr [17]
3 years ago
8

1. Name three obstacles that Mendeleev faced in his life? ​

Chemistry
1 answer:
Fittoniya [83]3 years ago
3 0

Answer:

was difficult to place isotopes of elements as they have the same chemical properties but different atomic masses. It was not possible to predict how many elements could be discovered between two heavy elements as the rise in atomic mass is not uniform.

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Which compounds are electrolytes
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Calcium.

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Explanation:

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Who ever does this, get brainiest.
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C.

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2. Which of the following is most likely to to cause the extinction
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a change of environment

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What is the density of a piece of wood that has a mass of 25.0 grams and a volume of 5.0 cm 3 ?
Georgia [21]

Answer:

5.0g/cm^3

Explanation:

Since we have the mass of the wood (25.0g) and the volume of the wood (5.0cm^3), can use the formula for density to answer this question.

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Density=25.0g/5.0cm^3

Density=5.0g/cm^3

Therefore, the density of the piece of wood is 5.0g/cm^3.

I hope this helps!

7 0
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Do we get to see all sides of the moon? Why?
nignag [31]

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Yes

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8 0
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