He thought it looked like plum pudding, with positively charged balls(pudding) and negatively charged raisins
Answer:
asking about subjective matters
possibly leading to a testable hypothesis
addressing a gap in knowledge
I got soo confused about that last part. I didn't know if that was an option or something you needed to be answered.
Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate cause-and-effect relationships.
Just remember how many electrons can each sublevel hold.
S=2
P=6
D=10
Since we have 10 for atomic number, we can assume we have 10 electrons
1S2
2S2
2P6
The rest have zero because we already have 10 (2+2+6=10)
Answer:
2.16 moles of Au₂S₃ are decomposed.
Explanation:
Given data:
Number of moles of gold (III) sulfide decomposed = ?
Number of moles of gold metal formed = 4.32 mol
Solution:
Chemical equation:
Au₂S₃ → 2Au + 3S
Now we will compare the moles of Au₂S₃ with gold metal.
Au : Au₂S₃
2 : 1
4.32 : 1/2×4.32 = 2.16
2.16 moles of Au₂S₃ are decomposed.
1) Equilibrium reaction:
<span>2NO2 <----> N2O4 + 57.2 kJ
2) The quantity 57.2 kJ on the right side indicates that the reaction generates heat, i.e. it is exothermic.
When you increase the temperature of an equilibrium chemical reaction that is exothermic you displace the equilibrium to the left, meaningh that more ractant will be formed..
Answer: the equilibrium will be displaced to the left producing more reatant, NO2.
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