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MrRissso [65]
3 years ago
6

In your own words, explain a crucial piece of evidence that Johannes Kepler could have used to support one of his laws of planet

ary motion.
Chemistry
1 answer:
lutik1710 [3]3 years ago
8 0
Johannes Kepler could have used Evidence gathered by "Tycho Brahe" <span>on the detailed positions of Mars in the sky. He used his entire data, plus Newton's view of observation, then he formulated his law of Planetary motion

Hope this helps!</span>
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Need help I don't remember what to do?
Lina20 [59]
I'm just doing the ones that you don't have numbers already for.
2.) just leave it alone and it's correct
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5.) just leave it alone and it's correct
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4 0
3 years ago
If you have 3.0 moles of argon gas at STP, how much volume will the argon take up?
Anestetic [448]
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3 0
3 years ago
Use the Henderson-Hasselbalch equation, eq. (3), to calculate the pH expected for a buffer solution prepared from this acid and
notka56 [123]

Answer:

pH=4.56

Explanation:

Hello there!

In this case, given the Henderson-Hasselbach equation, it is possible for us to compute the pH by firstly computing the concentration of the acid and the conjugate base; for this purpose we assume that the volume of the total solution is 0.025 L and the molar mass of the sodium base is 234 - 1 + 23 = 256 g/mol as one H is replaced by the Na:

n_{acid}=\frac{0.2g}{234g/mol}=0.000855mol\\\\n_{base}= \frac{0.2g}{256g/mol}=0.000781mol

And the concentrations are:

[acid]=0.000855mol/0.025L=0.0342M

[base]=0.000781mol/0.025L=0.0312M

Then, considering that the Ka of this acid is 2.5x10⁻⁵, we obtain for the pH:

pH=-log(2.5x10^{-5})+log(\frac{0.0312M}{0.0342M} )\\\\pH=4.60-0.04\\\\pH=4.56

Best regards!

6 0
2 years ago
All the following can result in the disruption of a protein's ability to function, except A. mechanic agitations. B. maintaining
ValentinkaMS [17]
Its either A or B, 50-50 chance?
7 0
3 years ago
Read 2 more answers
Given that a 19.00 g milk chocolate bar contains 11.50 g of sugar, calculate the percentage of sugar present in 19.00
Jet001 [13]

Explanation:

check the steps in the attached image

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