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Arlecino [84]
3 years ago
6

Which solution is the most concentrated?

Chemistry
1 answer:
Archy [21]3 years ago
4 0

you have a picture so i can see it

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A geologist studies layered rock to determine its age. Bacteria fossils from the Precambrian age are found in the rock’s upper l
kondor19780726 [428]
Answer:
The bottom layers of the rock could have formed before life occurred.

Explanation:
The bottom layers of the rock could have formed before life occurred because there is no fossil is present. If there is life at that time so the fossils are present at the bottom layer so the absence indicates that is no life present at that time. The bottom layer is older than the upper layer so that's why fossils of bacteria are found in the upper layer of the rock.

Answer:
C. Because bacterial fossils are found only in the upper layers, scientists can conclude that these bacteria evolved towards the end of Precambrian time.

There’s two different types of answers for this question so I just put both of them. Hope it helps : )

4 0
2 years ago
ANSWER IN YOUR OWN WORDS!<br> How does the pH of an acid compare with the pH of a neutral solution?
Lady bird [3.3K]

Answer:

A pH of 7 is neutral.A pH of less than 7 is acidic.

Explanation:

5 0
2 years ago
Read 2 more answers
The data below shows the change in concentration of dinitrogen pentoxide over time, at 330 K, according to the following process
tensa zangetsu [6.8K]

Answer: a) 1.7\times 10^{-4}

b) 3.4\times 10^{-4}

Explanation:

The reaction is :

2N_2O_5(g)\rightarrow 4NO_2(g)+O_2(g)

Rate = Rate of disappearance of N_2O_5 = Rate of appearance of NO_2

Rate =  -\frac{d[N_2O_5]}{2dt} = \frac{d[NO_2]}{4dt}

Rate of disappearance of N_2O_5 = \frac{\text {change in concentration}}{time} = \frac{0.100-0.066}{200-0}=1.7\times 10^{-4}

a) Rate of disappearance of N_2O_5 = -\frac{d[N_2O_5]}{2dt}

Rate of appearance of NO_2 = \frac{d[NO_2]}{4dt}

b) Rate of appearance of NO_2 =  \frac{d[NO_2]}{dt}=2\times 1.7\times 10^{-4}}=3.4\times 10^{-4}

8 0
2 years ago
Which one of these statements about cell division is not accurate?
Masja [62]
The answer is b damaged tissue can not be repaired
7 0
3 years ago
Read 2 more answers
you are giving your child a medicine that has a dose of 2 tsp per dose. The instructions indicate that you are to give the child
Anarel [89]

Answer:

this is ans

Explanation:

this is ans

3 0
2 years ago
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