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Anna [14]
2 years ago
5

chemistry moles PLEASE HELP!! A package of foil weighs 360g. How many moles of aluminium are there in this package??

Chemistry
1 answer:
Ksenya-84 [330]2 years ago
6 0

Answer:

I am not 100% sure but I think it is 26.981538

Explanation:

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Given the speed of light (3.00 × 108 m/s) and a wavelength 5.9 × 10-7 m, what is the frequency?
Cerrena [4.2K]
Wavelength x Frequency = Speed

So, 5.9 x 10^-7 x F = 3 x 10^8

Rearranging the equation, we get:
F = (3 x 10^8)/(5.9 x 10^-7) = 5.08 x 10^14 Hz

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5 0
3 years ago
What is the pH at the half-equivalence point in the titration of a weak base with a strong acid? The pKb of the weak base is 7.9
ValentinkaMS [17]

Hey there!

Given the reaction:

B + H⁺   => HB⁺


At half-equivalence point :  [B] = [HB⁺]

=> [B] / [HB⁺] = 1

Henderson-Hasselbalch equation :


pH = pKa + log ( [B] ) / ( HB⁺)]

pH = 14 - pKb + log ( 1 )

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pH = 6.05


Answer C


Hope that helps!



5 0
3 years ago
What is the name of MnO? Explain how you determined the bond type and the steps you used to determine the naming convention for
xeze [42]

Answer:

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Explanation:

I don't know

5 0
3 years ago
In using the reaction quotient Q to analyze reaction progress, for the condition where Q<
Norma-Jean [14]

Answer:

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Explanation:

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K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

  • If Q > K_{eq}  , then the equilibrium will shift in left direction or in backward direction.the reaction will move back to the formation of reactants from the product
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7 0
4 years ago
Chemicals that are able to reduce activation energy in a reaction and speed the reaction rate are
SOVA2 [1]
I believe it's D. A catalyst causes an increases the rate of a reaction without itself being consumed. 
3 0
3 years ago
Read 2 more answers
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