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Musya8 [376]
2 years ago
10

How scientists used the scientific method to learn more about how dinosaurs became extinct​

Chemistry
1 answer:
lesya [120]2 years ago
4 0

Answer:

they tested the bone age

Explanation:

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What is the concentration of a solution that has a volume of 2.5L and contains exactly 2.125 moles of calcium phosphate
Iteru [2.4K]

Answer:

0.85 mol/L.

Explanation:

  • Molarity is defined as the no. of moles of solute dissolved in a liter of the solution.

<em>M = (no. of moles of solute)/(Volume of the solution (L))</em>

no. of moles of calcium phosphate = 2.125 mol.

Volume of the solution = 2.5 L.

<em>∴ M of calcium phosphate</em> = (2.125 mol)/(2.5 L) = <em>0.85 mol/L.</em>

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Is stannous fluoride ionic or covalent
laila [671]
Stannous flutoide is ionic
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What happens when Mg forms an ionic bond?
uysha [10]

Answer:

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3 years ago
___au2s3 ___h2 → ___au ___h2s
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The best way to balance an equation is to balance one atom at a time.
You start with two Au atoms on the left, so you know the coefficient of Au on the right has to be 2. So at first we get,
Au2S3 + H2 --> 2Au + H2S
Then, notice you have 3 sulfur atoms on the left, so you need three on the right.
Our equation becomes
Au2S3 + H2 --> 2Au + 3H2S
Lastly, we now have six hydrogen atoms on the right, and only two on the left, so we assign a three to the H2 on the left
Au2S3 + 3H2 --> 2Au + 3H2S Is the balanced final equation.

7 0
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How many grams are in 2.3 x 10^23 atoms of silver
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