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Natalka [10]
3 years ago
13

Help me with this please!!! Smart ones help me 18 points

Chemistry
2 answers:
Temka [501]3 years ago
7 0
1/2 is the odds of picking a quarter.  Since there are 3 quarters and 3 dimes, add them together and you get 6.  3/6 is equal to 1/2.
Helen [10]3 years ago
4 0
Hey! The answer would be 1/2.
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In a 1.0× 10–6 M solution of Ba(OH)2(aq) at 25 °C, identify the relative molar amounts of these species.
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Thank you for posting your question here. Below is the solution:

HNO3 --> H+ + NO3- 
<span>HNO3 = strong acid so 100% dissociation </span>
<span>** one doesn't need to find the molarity of water since it is the solvent </span>

<span>0M HNO3 </span>
<span>1x10^-6M H3O+ </span>
<span>1x10^-6M NO3- </span>
<span>1x10^-8M OH-.....the Kw = 1x10^-14 = [H+][OH-] </span>
<span>you have 1x10^-6M H+ so, 1x10^-14 / 1x10^-6 = 1x10^-8M OH- </span>


<span>1x10^-6 Ba(OH)2 = strong base, 100% dissociation </span>
<span>1x10^-6M Ba2+ </span>
<span>2x10^-6M OH- since there are 2 OH- / 1 Ba2+ </span>
<span>0M Ba(OH)2 </span>
<span>5x10^-9M H3O+</span>
4 0
3 years ago
The mass of a proton is equal to the mass of?
just olya [345]
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*Hope that helps and enjoy Brainly :)*
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Explanation:

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