Answer:
Explanation:
<u>1) Calculate the mass of carbon (C)</u>
- mass of C = % of C × mass of sample / 100
- mass of C = 37.51% × 5.91 g / 100 = 2.21 g
<u>2) Calculate the number of moles of C</u>
- number of moles = mass in grams / molar mass
- number of moles of C = 2.21 g / 12.01 g/mol = 0.184 moles
<u>3) Calculate the number of moles of hydrogen atoms, H:</u>
- number of moles = number of atoms / Avogadro's number
- number of moles of H = 1.4830 × 10²³ / 6.022 × 10²³ = 0.24626 moles
<u>4) Calculate the number of moles of oxygen atoms, O:</u>
- number of moles = number of atoms / Avogadro's number
- number of moles of O = 1.2966 × 10²³ / 6.022 × 10²³ = 0.21531 moles
<u>5) Find the </u><u>mole ratios</u><u>:</u>
Summary of moles:
Divide every amount by the smallest number, which is 0.184:
- H: 0.24626 / 0.184 = 1.34
- O: 0.21531 / 0.184 = 1.17
Multiply by 3 to round to integer numbers:
Multiply by 2 to round to integer numbers:
Use the mole ratios as superscripts to write the empirical formula
Just as a reference, you can search in internet and find that one compound with that empirical formula is citric acid.
Answer: $1338.16
Explanation: Total cost of stock= $2568
Total cost of stock including the brokerage
$
Selling price of stock = $3928
Selling price of stock including trading fee=($3928-$7)=$3919
Net Proceeds = Net selling price of stock - Cost Price of stock
Net Proceeds = ($3919 - $2580.84) = $1338.16
Answer:
129,600kg/day
Explanation:
The river is flowing at 30.0
1
= 1000L
Multiply by 1000 to convert to L/s
flowrate of river = 30*1000 =30,000L/s
Convert L/s to litre per day by multiplying by 24*60*60
flowrate of river = 30,000 * 24*60*60 L/day
= 2,592,000,000L/day
if the river contains 50mg of salt in 1L of solution
lets find how many mg of salt (X) is contained in 2,592,000,000L/day
X= 
X= 129,600,000,000 mg/day
convert this value to kg/day by multiply by 
X= 129,600kg/day
Answer : The volume of solution will be 2.96 liters.
Explanation :
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :

In this question, the solute is NaF.
Now put all the given values in this formula, we get:



Therefore, the volume of solution will be 2.96 liters.
Answer:


Explanation:
Hello,
At first, it turns out convenient to compute the total moles of sodium that will be dissolved into the solution by considering the added amounts of sodium bromide and sodium sulfate:

Once we've got the moles we compute the final volume via:

Thus, the molarity of the sodium atoms turn out into:

Now, we perform the same procedure but now for the bromide ions:

Finally, its molarity results:

Best regards.