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Vinil7 [7]
2 years ago
12

Please help me:) thanks!

Chemistry
2 answers:
Olegator [25]2 years ago
5 0

Abracadabra, your answer

2Cl2 contains 4 atoms

NaOH contains 3 atoms

CaCO3 contains 5 atoms

Cloud [144]2 years ago
4 0

Answer:

2Cl2 has 4 atoms

NaOH has 3 atoms

CaCO3 has 5 atoms

Explanation:

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Describe the evidence of changes in organisms in the Cambrian Era that are reflected in the fossil record.​
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Morphology and phylogenetics revealed by fossils. Perhaps the strongest evidence to support the Cambrian evolutionary explosion of animal forms is the first clear appearance, in the Early Cambrian, of skeletal fossils representing members of many marine bilaterian animal phyla

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Which organisms have greater variation and produce offspring through asexual reproduction?
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8 0
3 years ago
A gas effuses 1.55 times faster than propane (C3H8)at the
stepladder [879]

Answer:  The mass of the gas is 18.3 g/mol.

Explanation:

To calculate the rate of diffusion of gas, we use Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:

\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}

\frac{Rate_{X}}{Rate_{C_3H_8}}=1.55

\frac{Rate_{X}}{Rate_{C_3H_8}}=\sqrt{\frac{M_{C_3H_8}}{M_{X}}}

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Squaring both sides and solving for M_{X}

M_{X}=18.3g/mol

Hence, the molar mas of unknown gas is 18.3 g/mol.

5 0
3 years ago
Read 2 more answers
NEED HELP QUICK!!!!!!!!!!!!!!
Zigmanuir [339]
The answer is Index fossils its the only answer it could be

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3 years ago
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