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slavikrds [6]
3 years ago
9

Which of the following conclusions might a scientist make when fossils of two different species of very similar organisms are fo

und in different layers of rock?
Question 2 options:

A. Both organisms had similar behaviors.


B. One organism was prey for the other organism.


C. One organism was ancestor of the other organism.


D. Both organisms lived around the same time.
Chemistry
1 answer:
nata0808 [166]3 years ago
5 0

Answer:

if its multiple, C and D, if not, C

Explanation:

brainliesttt?

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They have 6 valance electrons.
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Write a word equation for the chemical reaction.<br><br> I’ll brainlist.
Alex

Answer:

potassium hydroxide + sulfuric acid → potassium sulfate + water.

Explanation:

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pashok25 [27]

Answer:

b.

Explanation:

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3 years ago
The theoretical yield of Cl2 from certain starting amounts of MnO2 and HCl was calculated as 60.25 g and 65.02 g, respectively.
hoa [83]

The actual yield is 43 g Cl₂.

The <em>limiting reactant was MnO₂</em> because it gave the smaller mass of Cl₂.

∴ The <em>theoretical yield</em> is 60.25 g Cl₂.

% yield = actual yield/theoretical yield × 100 %

Actual yield = theoretical yield × (% yield/100 %) = 60.25 g × (72 %/100%) = 43 g

8 0
3 years ago
An unknown gas diffuses 1.25 times faster than CO2 gas. What is the molar mass of the unknown gas?​
hodyreva [135]

Answer:

28.16 g/mol

Explanation:

From Graham's law;

Let the rate of diffusion of gas X be 1.25

Let the rate of diffusion of CO2 be 1

Molecular mass of gas X= M

Molecular mass of CO2 = 44g/mol

1.25/1=√44/M

(1.25/1)^2 = 44/M

1.5625 = 44/M

M= 44/1.5625

M= 28.16 g/mol

4 0
3 years ago
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