Answer:
6.0 x 10^-1 g Fe
Explanation:
I might be in the wrong but hear me out:
Convert 0.85 g to mols of Fe2O3.
0.85 g x 1 mol/159.69=0.0053 mols Fe2O3.
Get moles of Fe (iron metal).
0.0053 mols Fe2O3 x 2 mol Fe/ 1 mol Fe2O3
= 1.0 x 10^-2 mols Fe
Convert moles to grams of Fe.
1.0 x 10^-2 mols of Fe x 55.85 grams Fe/ 1 mol Fe
= 6.0 x 10^-1
There should be only one sig fig. Hoped this helped.
Answer:
Percent yield = 7.1%
Explanation:
The general reaction of the problem is:
Ca(OH)₂ + CO₂ → H₂O + CaCO₃
To solve this question we need to find theoretical yield using the amount of carbon dioxide added because:
Percent yield = Actual yield (3.22g) / Theoretical yield * 100
Theoretical yield is the maximum amount of product that could be obtained. To find it we need to convert the mass of CO₂ to moles. The moles of CO₂ = Moles of CaCO₃:
<em>Moles CO₂ -Molar mass: 44.01g/mol):</em>
20.0g * (1mol / 44.01g) = 0.454 moles CO₂ = Moles of CaCO₃ produced
<em>Mass CaCO₃ = Theoretical yield -Molar mass: 100.09g/mol-:</em>
0.454 moles * (100.09g / mol) = 45.5g of CaCO₃ = Theoretical yield.
Replacing:
Percent yield = 3.22g / 45.5g * 100
<h3>Percent yield = 7.1%</h3>
B. Low blood pressure and drooling. If the user is tranquilized, he would not be able to hinder the production of saliva, leading to drooling. And if the victim was tranquilized, his heart would slow down, not speed up, resulting in a lower blood pressure.
Answer:
The same 45.98 g of NaCl will be produced since 2 moles of Na will react with 2 moles of NaCl. Hence the stoichiometric coefficient will be in a ratio of 1:1