Answer:
1. A
2. D
3. D
4. B
Explanation:
Sulfer is in the 3rd period of the periodic table meaning that 2 periods came before it hence the 2 electron shells and it is in the 6th group hence the 6 valence electrons.
Using this logic we know that the element in the 5th period and the 7th group which would be Iodine
We also know that the element in the 4th period and 8th group is Krypton
The Lewis dot model is more commonly used to show chemical reactions, I haven't heard of the addition or subtraction models before so there's a chance that it may only be part of your curriculum, or they are answers made up for your multiple choice.
Hope this helps!!!
My apologies, I don’t seem to understand the question.
Answer: Well,diffusion does not happen in solids because the particles are not free to move around and so they cannot inter-mix.
Answer:
84.2mL
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 128mL
Initial pressure (P1) = 500mmHg
Final pressure (P2) = stp = 760mmHg
Final volume (V2) =..?
Thus, the new volume of the gas can be obtained by using the Boyle's law equation as follow:
P1V1 = P2V2
500 x 128 = 760 x V2
Divide both side by 760
V2 = (500 x 128)/760
V2 = 84.2mL
Therefore, the new volume of the gas is 84.2mL
