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natima [27]
4 years ago
7

Which of the following solutions has the greater buffer capacity: (a) 100 mL of 0.30M HNO2 - 0.30 M NaNO2 or (b) 100 mL of 0.10

M HNO2 - 0.10 M NaNO2?
Chemistry
1 answer:
never [62]4 years ago
4 0

Answer:

100mL of 0.10M HNO2 and 0.10M NaNO2

Explanation:

because solution has the greatest buffering capacity when the concentration of the weak acid is = at the concentration of its conjugate base.

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The ph of a 0.55 m aqueous solution of hypobromous acid, hbro, at 25.0 °c is 4.48. what is the value of ka for hbro?
gladu [14]
Hbro  dissociate  as  follows
HBro--->  H+  +  BrO-
  Ka=  (H+)(BrO-)  /  HBro
 PH  =  -log (H+)
therefore (H+)  =  10^-4.48= 3.31  x10^-5
ka is  therefore= ( 3.31  x 10^-5)^2/0.55=1.99  x10^-9
6 0
3 years ago
Name the SI base units that are important in chemistry, and give the SI units for expressing the following: (a)length, (b) volum
kirza4 [7]

Answer and Explanation:

The basic unit which are that are important in chemistry are meter, kilogram ,mol,m^3

Candela which is the unit of luminous of intensity is not so important in physics

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(c) Si unit of mass is kilogram (kg)

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4 0
3 years ago
Please help me !!! thank yoy
Helga [31]

Answer:

Motor Neurons.

Explanation:

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Hope that helps

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Have a good day

7 0
3 years ago
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Answer:

i think its C

Explanation: im at the Beach all the time and waves wash the sand away

6 0
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A 32.78 g sample of a substance is initially at 22.7 °c. after absorbing 2017 j of heat, the temperature of the substance is 173
larisa86 [58]
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