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Nezavi [6.7K]
3 years ago
14

7. What determines what type of element an atom is?

Chemistry
1 answer:
frozen [14]3 years ago
3 0
The amount of protons
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Commercial agriculture can often lead to water-quality problems. In one to two sentences, explain how two of those problems occu
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3 years ago
Read 2 more answers
If you dilute 18.8 mL of a 3.5 M solution to make 296.6 mL of solution, what is the molarity of the dilute solution?
hodyreva [135]

Answer:

0.22M

Explanation:

We will be using the law of dilutions. We are simply increasing the amount of solvent to create a larger volume of solution.

So: moles before dilution = moles after dilution & moles_{concentrated} = moles_{dilute}. And M = moles/liter of solution, so if we express this as moles = M x L_{soln}.

That is how we derive the formula we will be using: M_{concentrated} * Vol_{conc} = M_{dilute} * Vol_{dilute}

or

M_{1} * Vol_{1} = M_{2} * Vol_{2}

Applying this formula to our problem, we can substitute the variables with the given values to find the molarity of the dilute solution.

M1 = 3.5M

V1 = 18.8mL

M2 = ?

V2 = 296.6mL

Equation: (3.5M)(18.8mL) = (296.6mL)(M2)

==> 65.8M*mL = 296.6mL * M2

==> M2 = (65.8 M*mL)/296.6mL

==> M2 = 0.22M

8 0
3 years ago
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