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Vilka [71]
3 years ago
11

How Fast can you answer how fast can i give you brainliest????? HELP

Chemistry
1 answer:
atroni [7]3 years ago
3 0
I’m pretty sure it’s A sm effort for an explanation
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Please help me with this​
elena-s [515]

Answer:

5

Explanation:

5 0
3 years ago
What kind of charge does a cation have
Ainat [17]
I believe it has a positive
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6 0
3 years ago
Read 2 more answers
What is the mole fraction of oxygen in a gaseous mixture containing 25 grams of oxygen, 15 grams of nitrogen, and 10 grams of he
4vir4ik [10]
Convert all the gases from grams to moles using their molar masses first. Remember that nitrogen and oxygen exist as DIATOMIC gases.

O2 - 25 g / 32 g/mol = 0.78 mol O2
N2 - 15 g / 28.02 g/mol = 0.54 mol N2
He - 10 g / 4.0 g/mol = 2.5 mol He

Add all the moles of gases.

0.78 + 0.54 + 2.5 = 3.82 moles

Divide O2 moles by total moles.

0.78/3.82 = 0.20
7 0
3 years ago
What reaction is depicted by the given equation: Au3+ + 3e− Au
san4es73 [151]

Answer:

The answer is option B.

Reduction

Hope this helps you

4 0
4 years ago
how many moles of potassium would you need to prepare 1200 grams of 5.0% potassium sulfate (m/m) solution
Marianna [84]
The  moles  of  potassium  that  you  would    need  to  prepare  1200 g  of  5% potassium   sulfate solution  is    1.538 moles

calculation
  calculate  the mass  potassium using  the below formula

%M/M =  mass  of the  solute(potassium)/mass of the  solvent (potassium  sulfate solution)

let  the  mass  of  potassium be represented by  Y

then  convert %  into fraction  = 5/100

5/100 =  Y/1200
cross  multiplication
100y =  6000
divide  both side by 100

Y=  60 g

moles of potassium =mass/molar  mass

= 60/39=1.538
7 0
4 years ago
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