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koban [17]
3 years ago
15

How many moles are in 54.73 L of Helium?

Chemistry
1 answer:
katrin [286]3 years ago
4 0
The answer is 13.67 moles
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What mass of oxygen is needed for the complete combustion of 4.60×10−3g of methane?
sp2606 [1]
First step in answering the question is to establish a balanced chemical reaction equation. More specifically, a combustion chemical equation. 

CH4 + 2O2 ---> CO2 + 2H20

Then using dimension analysis: 

4.60*10^{-3} g CH4 ( \frac{moleCH4}{16 g CH4}) * ( \frac{2mole O2}{mole CH4}) * ( \frac{32 g O2}{mole O2} ) =  0.0184 g O_{2}
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3 years ago
What is the mass of the beaker plus water
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7 0
3 years ago
to prepare for a lab experiment, ted is making a solution that uses two types of concentrations of hcl (hydrochloric acid): 80 m
Leno4ka [110]

The concentration of the HCL in the mixed solution is 32%

Considering the First solution containing HCl,

80 ml of 50% = 80 x (50/100)

  = 80 x 0.5

  = 40 ml of HCL

Considering the second solution containing HCl,

120 ml of 80% = 120 x (20/100)

  = 120 x 0.2

  = 24 ml of HCl

So, the combined solution will have = 40+ 24

          = 64 ml of HCL

Since the combined  volume of the two solutions was = 80+120

              = 200 ml

As for finding the concentration of HCl in a solution, the required formula is to divide the volume of HCl by the combined volution of the solution.

Therefore, the  concentration of  HCl will be = 64/200

        = 0.32

Which is 32% of HCl

To know more about the concentration of solutions refer to the link brainly.com/question/12247996?referrer=searchResults.

#SPJ4

5 0
2 years ago
How many liters of water are added to 165 grams of magnesium nitride to make 2.40 M solution
marta [7]

Answer:

681.03 mL ≅ 0.681 L.

Explanation:

  • The molarity of a solution is defined as the no. of moles of solute in 1.0 liter of the solution.

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3 0
3 years ago
Your friend realized that they have no more money left to pay their debts (money owed). What would you say to your friend to con
lukranit [14]

Answer:

to get a job and why does she not have money

Explanation:

Have a nice day :)

7 0
3 years ago
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