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xxTIMURxx [149]
3 years ago
5

Answer only if you had/have braces how long did it take to notice change with your braces on

Chemistry
2 answers:
AleksAgata [21]3 years ago
8 0

Answer:

about 2 years I think, you might have to ask your dentist

Explanation:

lakkis [162]3 years ago
5 0

Answer:

it really depens of ur treatment i had braces and it took a year and now i got them again and they say its gonna take a year so it depends on ur treatment

Explanation:

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Eva8 [605]

Answer:

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you wish to prepare an hc2h3o2 buffer with a ph of 5.44. if the pka of the acid is 4.74, what ratio of c2h3o2-/hc2h3o2 must you
vazorg [7]

The ratio of buffer C₂H₃O₂ /HC₂H₃O₂  must you use are1:0.199 or 10:2

the ratio of buffer C₂H₃O₂ /HC₂H₃O₂  can be calculate using the Henderson-Hasselbalch Equation which relates the pH to the measure of acidity pKa. The equation is given as:

pH = pKa + log ([base]/[acid]

Where,

[base] = concentration of C₂H₃O₂in molarity or moles

[acid] = concentration of HC₂H₃O₂ in molarity or moles

For the sake of easy calculation, allow us to assume that:

[base] =1

[acid] = x

Therefore using equation 1,

5.44 = 4.74 + log (1 / x)

log [base / acid] = 0.7

1 / x = 5.0118

x = 0.199

The required ratio of buffer C₂H₃O₂ /HC₂H₃O₂ is 1:0.199 or 10:2

learn more about buffer ratio here brainly.com/question/4342532

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1 year ago
Name at least 4 other gases in atmosphere
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3 years ago
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Aleonysh [2.5K]

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