Hello!
Here from the unbalanced reaction we can balance it by comparing the reactants and products(Left hand side versus Right hand side). We can see one carbon and two oxygen on the left hand side, but then we have two carbon and only 1 oxygen on the rhs. This goes against matter or energy can be neither created or destroyed so we have to balance it first to compare mole to mole relationships. So we can simply right in the the missing elements and balance like this:
SiO2(s) + 2C(s) —-> SiC(s) + C02(g)
Now from the balanced reaction we can see it takes 2 moles of Carbon to make only 1 mole of SiC. So if we are given the amount of moles Of SiC produced, then we can see from the 2:1 Ratio of Carbon:SiC that we need double the amount of Carbon to produce 1mole of SiC(s) since the Carbon used is making SiC(s) and CO2(g). Therefore we would need 5moles of Carbon to start with, in order to make 2.5mole of SiC and CO2 from the reaction given above.
Hope this helps. Any questions please feel free to ask. Thank you kindly!
Answer:
25 : 18
Explanation:
Mole ratio:
It is simply the ratio between moles of any two compounds take part in chemical reaction. It gives the proportion of compounds present.
The given reaction is the burning of octane. Two moles of octane burned in the presence of twenty five moles of oxygen and produced sixteen moles of carbon dioxide and eighteen moles of water.
Chemical equation:
C₈H₁₈ + O₂ → CO₂ + H₂O
Balance chemical equation:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
The mole ratio of oxygen and water is 25 : 18.
You need a control so you have something to compare the experimental group on-- If you don't have a control group, how will you know what's changed?
Answer:
The amount of each element that begins photosynthesis equals the amount of each element that is produced
Explanation:
