Which group of elements will readily lose one electron to meet the octet rule? Alkaline Earth Metals c. Halogens Alkali Metals d
1 answer:
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Answer:
M = 3.69 M.
Explanation:
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In this case, according to the given information, it turns out possible for us to calculate the molar concentration of the 1.29 moles of KCl in 350 mL of solution by recalling the mathematical definition of molarity as the division of the moles by the volume in liters, in this case 0.350 L; thus, we proceed as follows:
Which gives molar units, M, or just mol/L.
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<u>Answer:</u> The percent yield of oxygen gas is 67.53 %.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
Given mass of water = 17.0 g
Molar mass of water = 18 g/mol
Putting values in equation 1, we get:
For the given chemical equation:
By Stoichiometry of the reaction:
2 moles of water produces 1 mole of oxygen gas
So, 0.944 moles of water will produce = of oxygen gas
Now, calculating the mass of oxygen gas from equation 1, we get:
Molar mass of oxygen gas = 32 g/mol
Moles of oxygen gas = 0.472 moles
Putting values in equation 1, we get:
To calculate the percentage yield of oxygen gas, we use the equation:
Experimental yield of oxygen gas = 10.2 g
Theoretical yield of oxygen gas = 15.104 g
Putting values in above equation, we get:
Hence, the percent yield of oxygen gas is 67.53 %.