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777dan777 [17]
4 years ago
13

Help ASAP please. I don’t understand.

Chemistry
1 answer:
WARRIOR [948]4 years ago
4 0

Answer:

a

Explanation:

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What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated
Zielflug [23.3K]
Reaction is NH4OH <-> NH4+ OH- (note this is reversible)

Draw up an ICE table

Let x be equilibrium conc of OH- assume init conc of OH is 0M and init conc of NH4+ is 0M also. Init conc of NH4OH is 0.1M so equilibrium conc will be 0.1-x.

%dissociation = x/0.1-x * 100%

1 = 100x/0.1-x

0.1-x = 100x

101x = 0.1

x = 0.0009901

pOH = -log(0.0009901) = 3.00
5 0
3 years ago
PLEASE HELP ME PLEASE!!!!!!!!
SVETLANKA909090 [29]

So yield = actual/predicted*100

You need to find the theoretical yield. CONVERT INTO MOLES. this is the 1st step you do in most calculation questions.

I got 15.92%

4 0
3 years ago
Animals can change the energy in food into energy the animals can use. What type of energy is in the food before the animals cha
SVEN [57.7K]

D. Light energy is the right answer

7 0
4 years ago
PLEASE HELP ME. REAL ANSWERS ONLY PLZ
eimsori [14]

Answer:

Please make it full I'm not seeing it

8 0
3 years ago
Calculate the number of moles of an ideal gas if it occupies 1750 dm3 under 125,000 Pa at a temperature of 127 C.
Phoenix [80]

Hey there!


* Converts 1750 dm³ in liters :


1 dm³ = 1 L so 1750 dm³ = 1750 liters



* Convertes 125,000 Pa in atm :


1 Pa = 9.86*10⁻⁶ atm so 9.86*10⁻⁶ / 125,000 => 1.233 atm


* Convertes 127ºC in K :


127 + 273.15 => 400.15 K


R = 0.082 atm.L/mol.K


Finally, it uses an equation of clapeyron :


p * V = n * R * T


1.233 * 1750 = n * 0.082 * 400.15


2157.75 = n * 32.8123


n = 2157.75 / 32.8123


n = 65.76 moles



hope this helps!



5 0
3 years ago
Read 2 more answers
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