Answer: a. 7.31 g
b. 20.4 %
Explanation:
To calculate the moles :
According to stoichiometry :
3 moles of require = 1 mole of
Thus 0.645 moles of will require= of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent.
As 3 moles of give = 2 moles of
Thus 0.645 moles of give = of
Mass of
Thus theoretical yield for this reaction under the given conditions is 7.31 g.
b)
The percent yield for this reaction under the given conditions is 20.4 %
10 grams of gold would have a specific heat of 0.31 calories ie 10 x 0.031 and if heated up by 20.0 degrees centigrade then 20.0 x 0.31 would be a 6.2 calorie increase in heat. In other words, the specific heat means that it is the calories produced in the gram of gold by a 1 degree rise in degrees centigrade.
Answer:
20g of water would freeze at the Same temperature
1:) <span>Zn + 2 HCl = ZnCl2 + H<span>2
</span></span>2:) 4 Fe + 3 O2 = 2 Fe2O3