A boy found a solid metal box in his backyard. The box had been buried for so long, it was difficult to determine from what the
box was made. The boy measured the box and found its volume (v) to be 17.63 cubic centimeters (cm3) and its mass (m) to be 158 grams (g). The boy knows the formula for density (D) is D = m/v. This table shows the density of several metals. DENSITY OF METALS *
A. copper
B. gold
C. silver
D. tin
A. copper
B. gold
C. silver
D. tin
1 answer:
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Answer:
Explanation:
Hello,
In this case, since the undergoing chemical reaction is:
The corresponding moles of carbon dioxide occupying 40.0 mL (0.0400 L) are computed by using the ideal gas equation at 273.15 K and 1.00 atm (STP) as follows:
Then, since the mole ratio between carbon dioxide and calcium carbonate is 1:1 and the molar mass of the reactant is 100 g/mol, the mass that yields such volume turns out:
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<u>Answer:</u> The volume of permanganate ion (potassium permanganate) is 10.0 mL
<u>Explanation:</u>
To calculate the number of moles for given molarity, we use the equation:
.....(1)
Molarity of ferrous sulfate solution = 0.381 M
Volume of solution = 20.0 mL = 0.020 L (Conversion factor: 1 L = 1000 mL)
Putting values in equation 1, we get:
For the given chemical equation:
By Stoichiometry of the reaction:
5 moles of iron (II) ions (ferrous sulfate) reacts with 1 mole of permanganate ion (potassium permanganate)
So, 0.00762 moles of iron (II) ions (ferrous sulfate) will react with = of permanganate ion (potassium permanganate)
Now, calculating the volume of permanganate ion (potassium permanganate) by using equation 1, we get:
Molarity of permanganate ion (potassium permanganate) = 0.152 M
Moles of permanganate ion (potassium permanganate) = 0.00152 mol
Putting values in equation 1, we get:
Hence, the volume of permanganate ion (potassium permanganate) is 10.0 mL