3) +7
I got this stupid question wrong so that you people don't have to. I simply hate chemistry and I wish it didn't exist. Kind of like this website that makes me explain the answer.
Trust me, the answer is correct
Answer: 19 grams
Explanation:
percent by mass = (mass of part)/(mass of whole) * 100
this means that in this question, 12 = x/160 * 100, where x is the amount of NaCl.
this means 12/100 = x/160, and thus x = (160)(12/100)=19.2 grams
The closest option is B.
Answer:
T₁ = 135.41 K
Explanation:
Given data:
Initial pressure = 1.12 atm
Finial temperature = 36.5 °C (36.5 +273 = 309.5 K)
Initial temperature = ?
Final pressure = 2.56 atm
Formula:
P₁/T₁ = P₂/T₂
P₁ = Initial pressure
T₁ = Initial temperature
P₂ = Final pressure
T₂ = Final temperature
Solution:
P₁/T₁ = P₂/T₂
T₁ = P₁T₂ /P₂
T₁ = 1.12 atm × 309.5 K / 2.56 atm
T₁ = 346.64 atm . K / 2.56 atm
T₁ = 135.41 K
Your answer is D.
Chlorophyll traps in the sunlight needed for the process known as 'photosynthesis' .
No it won't lose but it will gain and it gain up to it will fill 8 and because it need to satisfy the octet rule 7 will lose or gain electron and because it needs to stastify the octet rule by filling it up till 8 valence electron
