2 years ago

Can someone give ideas for a science project?

Chemistry

1 answer:

denis-greek [22]2 years ago

5 0

Answer:

Here's ya idea: Can the food we eat affect our heart rate?

Explanation:

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2 years ago

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Sladkaya [172]

The answer would be
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3 years ago

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A 0.75M solution of CH3OH is prepared in 0.500 kg of water. How many moles of CH3OH are needed?

4vir4ik [10]

Answer:

We need 0.375 mol of CH3OH to prepare the solution

Explanation:

For the problem they give us the following data:

Solution concentration 0,75 M

Mass of Solvent is 0,5Kg

knowing that the density of water is 1g / mL, we find the volume of water:

$d = \frac{g}{mL} \\\\ V= \frac{g}{d} = \frac{500g}{1 \frac{g}{mL} } = 500mL = 0,5 L$

Now, find moles of $CH_{3} OH$ are needed using the molarity equation:

$M = \frac{ moles }{ V (L)} \\\\\\molesCH_{3}OH = M . V(L) = 0,75 M . 0,5 L\\\\molesCH_{3}OH = 0,375 mol$

therefore the solution is prepared using 0.5 L of H2O and 0.375 moles of CH3OH, resulting in a concentration of 0,75M

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3 years ago

Calculate moles of oxygen atoms in 0.68mol of KMnO4

Dominik [7]

Alright, so that means we have 0.68 mol of the compound

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2 years ago

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Answer:

the answer is C

Explanation:

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