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Juliette [100K]
3 years ago
6

Help please with this tough question

Chemistry
1 answer:
Alla [95]3 years ago
5 0

Answer:

  1. option B
  2. option A

Explanation:

please mark me as brainliest ❤️

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Your answer is C forms of the same element that differ in the number of neutrons in each atom because if the number of neutrons change the whole element changes.
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Answer:

Organ systems & their main functions

Explanation:

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4 0
2 years ago
A person's heartbeat is 68 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does th
kari74 [83]
To determine the number of years for a person to live, we can divide the total number of beats in a lifetime to the number of beats per minute. We first need to check if the units are similar so we can cancel them. We do as follows:

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Hope this answers the question. Have a nice  day.
8 0
3 years ago
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Take off the .04 if necessary:)
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