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Hitman42 [59]
3 years ago
11

Which is a substance that is made up of only one type of atom?

Chemistry
1 answer:
Zolol [24]3 years ago
4 0
I believe that's an isotope, but I may be wrong.
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A globe is placed on your desk and you are asked to identify its physical properties. How would you describe the globe?
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What is the equilibrium condition in which a gas holds all the water vapor molecules that it can?
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<h3>Which three equilibrium conditions apply?</h3>

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7 0
2 years ago
A 250. ML sample of 0.3M HCl is partially neutralized by the addition of 100. ML of 0.25M NaOH.Find the concentration of hydroch
Dahasolnce [82]

Answer:- 0.143 M

Solution:- HCl and NaOH reacts in 1:1 mol ratio as shown in the below reaction:

HCl(aq)+NaOH(aq)\rightleftharpoons NaCl(aq)+H_2O(l)

Let's calculate the initial moles of HCl and the moles of NaOH added to it:

250.mL(\frac{1L}{1000mL})(\frac{0.3molHCl}{1L})

= 0.075 mol HCl

100.mL(\frac{1L}{1000mL})(\frac{0.25molNaOH}{1L})

= 0.025 mol NaOH

Since they react in 1:1 mol ratio, 0.025 mol of NaOH will react with 0.025 moles of HCl.

Remaining moles of HCl = 0.075 - 0.025 = 0.050

Total volume of the resulting solution = 0.250 L + 0.100 L = 0.350 L

So, the concentration of HCl in the resulting solution = \frac{0.050mol}{0.350L}

= 0.143 M

Hence, the concentration of HCl acid in the resulting solution is 0.143 M.


6 0
4 years ago
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