When Rutherford shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that this meant there was a tiny, dense nucleus that was causing these deflections.
Answer:
Cyclothymic Disorder
Explanation:
Cyclothymic disorder is a rare type of mood disorder whose symptoms resemble that of bipolar disorder. Although, the symptoms are manifested in a milder manner when compared with those of bipolar disorder.
The mood shifts in cyclothymic disorder are not as extreme as with Bipolar disorder.
The normal moods in cyclothymic disorder can last for a longer time than in bipolar disorder.
Although, the mood swings in cyclothymic disorder are more frequent than in bipolar disorder.
The true causes of cyclothymic disorder are not specifically known but bipolar disorder & cyclothymic can both occur in the same family suggesting that they may share similar causes.
The balanced chemical reaction would be:
16Al + 3S8 = 8Al2S3
We need to determine which reactants are the limiting and the excess. To determine this, we use the initial amounts of the reactants given above. We need to convert them into units of moles and use the balanced reaction to relate the substances calculating the amount needed to react all of the reactants. We do as follows:
63.8 g Al ( 1 mol Al / 26.98 g Al ) ( 3 mol S8 / 16 mol Al ) (256.48 g S / 1 mol S )= 113.72 g S8 needed to completely react
72.3 g S8 ( 1 mol S8 / 256.48 g S8) ( 16 mol Al / 3 mol S8 ) ( 26.98 g / mol ) = 40.56 g Al needed to completely react
Therefore, the excess would be Al and the limiting would be sulfur. The amount excess would be 63.8 g Al - 40.56 g Al = 23.24 g Al
Answer:
Nitrogen A would be more nucleophilicity (figure 1.)
Explanation:
In the <u>DMAP </u>molecule we will have 2 nitrogens label as "nitrogen A" and "nitrogen B". For nitrogen B we will have more<u> steric hindrance</u> due to the 2 methyls groups and the benzene ring. What will hinder the attack from this nitrogen (nitrogen B) to an <u>electrophile</u>. On the contrary, the attack of nitrogen A could easily occur.
Answer:
Potassium Nitride is composed of the greatest number of atoms.
Explanation:
In order to find the number of atoms present in each compound we will write down their molecular formulas and then we will add up the number of atoms present in them.
A: Dinitrogen Monoxide:
Chemical formula of Dinitrogen Monoxide is N₂O. Therefore, it contains two atoms of Nitrogen and one atom of oxygen Hence, in total it contains 3 atoms.
B: Sodium Chloride:
Chemical formula of Sodium Chloride is NaCl. Therefore, it contains one atom of Sodium and one atom of Chlorine Hence, in total it contains 2 atoms.
C: Potassium Nitride:
Chemical formula of Dinitrogen Monoxide is K₃N. Therefore, it contains three atoms of Potassium and one atom of Nitrogen Hence, in total it contains 4 atoms.
D: Carbon Dioxide:
Chemical formula of Carbon Dioxide is CO₂. Therefore, it contains one atom of Carbon and two atoms of Oxygen Hence, in total it contains 3 atoms.