Answer:
The answer to your question is: letter B.
Explanation:
Carbon atom double-bonded to an oxygen atom C= O,
a) Carbohydrate group this group does not exist
b)Carbonyl group This option is right, carbonyl group is C=O
c) Hydroxyl group This option is incorrect, hydroxyl group is OH, very different from C=O
d) Ketone group Ketone group does not exist, ketones have the same functional group as aldehydes (C=O)
The reaction is,
H2S + I2 --------------> 2 HI +S
Molar weight of H2S = 34 g per mol
Molar weight of HI =128 g per mol
Molar weight of I2 =254 g per mol
Moles of H2S in 49.2 g = 49.2 /34 mol = 1.447 mol
So according to stoichiometry of the reaction, number of I2 mols needed
= 1.447 mol
The mass of I2 needed = 1.447 mol x 254 g
Answer:
Covalent
Step-by-step explanation:
Covalent substances have relatively weak intermolecular forces. Many covalent substances such as hydrogen and oxygen are gases at room temperature, so they have low melting points.
<em>Ionic substances</em> have strong ion-ion attractive forces, and <em>metals </em>have strong metallic (electron-metal cation) attractions. I don't know of any metals or ionic compounds that are gases at normal conditions.
Postive elctrons and atoms
