The answer is iron. Hope it helps!
Answer:
0.0178
Explanation:
because you can work out the amount of moles in KOH using moles = mass/mr.
The mr of the KOH is 39.1+16+1=56.1 so you do
![\frac{3}{56.1}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B56.1%7D%20)
which equals to 0.053475 so u 3SF which is 0.0535moles
than u uses the molar ratio which is 3 to 1
so 0.0535÷3=0.0178 which is the moles of FeCl3.
hope this make sense:)
The answer is (4) methanol. The alcohol means that this molecule has a functional group of -OH. And the name usually ends with -ol. So the methanol is the only one with alcohol.
Answer:
Not necessarily
Explanation:
In the event of incresing the temprature it is not necessary that the solubility will increase always. Solubility of solids increases but solubility of gases dectreases on increases the temprature.
In solid solubility may remain unchange on increasing the temprature. This happens due to the fact that on increasing the temprature the mobility of substances increases due to thus the solubility increases.
Since we already have the balanced equation, we know that the ratio between
is
respectively.
So then we can set up a proportion to find the number of moles produced when 2.90 moles of Na react completely:
![\frac{4mol_{Na}}{2mol_{Na_{2}O}} =\frac{2.90mol_{Na}}{xmol_{Na_{2}O}}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4mol_%7BNa%7D%7D%7B2mol_%7BNa_%7B2%7DO%7D%7D%20%3D%5Cfrac%7B2.90mol_%7BNa%7D%7D%7Bxmol_%7BNa_%7B2%7DO%7D%7D%20%20)
Then we cross multiply and solve for x:
![4x=5.8](https://tex.z-dn.net/?f=%204x%3D5.8%20)
![x=1.45](https://tex.z-dn.net/?f=%20x%3D1.45%20)
Therefore, we know that when 2.90 moles of Na react completely, there are 1.45 moles of
that are produced.