Answer:
Honestly, I'm not even sure what the incorrect student was trying to do. The correct answer is:
( ) = the number of elements
(1)N2 and (3)H2
I think the student added the N2 and H2 to "balance" the chemical equation when instead they should have tried the balance the equation by making sure the atoms on the reactant side are equal to the atoms on the product side. You do this by multiplying the atoms on the reactant side until they equal the product side (not by adding them, as the student did).
Salicaldehyde is formed by reimer Riemann reaction in which phenol and chloroform are heated together with sodium hydroxide or pottasium hydroxide yeild salicaldehyde.
C6H5OH+CH3Cl ----------> C7H6O2
KOH
It is also prepared by corresponding phenol by duff reaction.
This says four figures. The 4 figures you should use are 4546 with a peek at 7 to see what effect it will have on the 4 main figures.
45.467 rounds to 45.47
You round the 4th figure up one. You are not concerned about the decimal places in this question.
Answer:
Ingredients
2 ⅓ cups all-purpose flour.
1 tablespoon baking powder.
¾ teaspoon salt.
1 ½ cups white sugar.
½ cup shortening.
2 eggs.
1 cup milk.
1 teaspoon vanilla extract.
Explanation:
Assuming that the nests are bird's nests and the data is a data gathered by the biologists about those nests.
A hurricane would cause some damage to the nests that is existent and cause a remarkably low count even during breeding season. It would also influence later birds because of population weakening due to the hurricane.
