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larisa [96]
4 years ago
6

PLS help it is a timed test!

Chemistry
1 answer:
Mars2501 [29]4 years ago
6 0

Answer:

For question 1 the answer is D, Because the higher you are the more PE you have.

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Which of the following words means "the degree to which a measurement is precise and reliable"?
Vikki [24]
B, because that’s the simplified definition of accuracy
7 0
3 years ago
Which of the following best defines climate)_( Short-term atmospheric conditions of a region Ob The weather pattern of an area o
Marina86 [1]

Answer:

Average weather conditions of a region over the long term

Explanation:

Climate is the long-term average of weather, typically averaged over a period of 30 years. More rigorously, it denotes the mean and variability of meteorological variables over a time spanning from months to millions of years.

4 0
3 years ago
Write the chemial formula for H3PO4​
rewona [7]

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3 0
3 years ago
You are performing a titration of a triprotic acid, when you spill water on your lab notebook. you can read that: pka 1 = 1.40,
eimsori [14]
According to the PH formula:
PH= Pka +㏒ [strong base/weak acid]
when we have PH at the first equivalence =3.35 and the Pka1 = 1.4
So, by substitution, we can get the value of ㏒[strong base / weak acid]
3.35 = 1.4 + ㏒[strong base/ weak acid]
∴㏒[strong base/weak acid] = 3.35-1.4 = 1.95 
to get the Pka2 we will substitute with the value of ㏒[strong base/ weak acid] and the value of PH of the second equivalence point
∴Pk2 = PH2 - ㏒[strong base/ weak acid]
          = 7.55 - 1.95 = 5.6 
5 0
3 years ago
A gas sample has a volume of 178 mL at 0.00oC.The temperature is raised at constant pressure until the volume reaches 211 mL. Wh
stiks02 [169]
V₁ = <span>178 mL                  - initial volume 
</span>T₁ = 0 ⁰C = 273K          - initial temperature
V₂ = <span>211 mL                   - final volume
</span>T₂ =?                              - final temperature

According to Charles's law when pressure is constant the Kelvin temperature and the volume will be directly related:

V₁/T₁=V₂/T₂

178/273=211/T₂

0.65=211/T₂

T₂=324K= 51⁰C
4 0
4 years ago
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