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3 years ago

Geologists use the Law of Superposition to date rock layers. However, the Earth's

Chemistry

1 answer:

Allisa [31]3 years ago

4 0

The answer is d faults

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Based on the collision theory, which factors are likely to increase the rate of reaction? Select all that apply.

Alexus [3.1K]

Answer:

Option a

Explanation:

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2 years ago

What mass of Ca(NO3)2 is equal to 0.75 moles of this substance?

sattari [20]

Answer:

Ca - 63.546 g

2N - 28.014 g

2O3 - 96 g

Ca(NO3)2 = 187.56 g

187.56 g x 0.75 mol = 140.67 g

Explanation:

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3 years ago

What do nuclear reactions change in the atom?

Ganezh [65]

Nuclear reactions happen inside the nucleus,so it changes the protons and neutrons

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3 years ago

Read 2 more answers

Now that you have exercised, walked your

ASHA 777 [7]

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

Given mass of melatonin = 0.01 g

Molar mass of melatonin $(C_{13}H_{16}N_2O_2)$ = 232.28 g/mol

$\text{Number of moles of melatonin}=\frac{0.01 g}{232.28g/mol}=0.000043mol$

Thus the moles of melatonin in 0.01 g are 0.000043

4 0

3 years ago

Please help me with this, thank you so much

Basile [38]

I can’t answer the exact thing, but I know how to do it. One of the nitrogen bases always pairs with a different one, so once you know what pairs with what you just write it down. If you need more help just ask :) tip: one base will only join with a different one. One won’t join to multiple (from what I know as of now)

7 0

3 years ago