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ch4aika [34]
3 years ago
5

How can animal fossils help us understand the earth​

Chemistry
1 answer:
Alex17521 [72]3 years ago
7 0

Answer:

Some animals and plant are only known to us as fossils. hope this helps. and have a nice day:)

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What is the gram formula of na2co3
makkiz [27]

Answer:

106 gfm

Explanation:

element. number masses

Na. 2 23×2

C. 1. 12

O. 3. 16×3

then add

106 gfm

5 0
2 years ago
Find the partial pressure of helium gas in mmHg
mezya [45]

Answer:

214 mmhg

Explanation:

5 0
2 years ago
1. An oxide of chromium is found to have the following % composition: 68.4% Cr
abruzzese [7]

Answer:

Empirical formula is Cr₂O₃.

Explanation:

Given data:

Percentage of Cr = 68.4%

Percentage of O = 31.6%

Empirical formula = ?

Solution:

Number of gram atoms of Cr = 68.4 / 52 = 1.3 2

Number of gram atoms of O = 31.6 / 16 = 1.98

Atomic ratio:

                            Cr               :         O

                           1.32/1.32     :       1.98/1.32

                               1              :        1.5

Cr : O = 1 :  1.5

Cr : O = 2(1 : 1.5)

Empirical formula is Cr₂O₃.

6 0
3 years ago
Which process is happening in the reaction that is shown
erastova [34]
I believe it’s B I apologize if it’s wrong
4 0
3 years ago
What is the name of the molecule shown below?
xxTIMURxx [149]

Answer:

B. 1-heptene

Explanation:

The 1-HEPTENE molecule contains a total of 20 bond(s) There are 6 non-H bond(s), 1 multiple bond(s), 4 rotatable bond(s) and 1 double bond(s).

6 0
2 years ago
Read 2 more answers
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