Answer:
A
Explanation:
they usually have that Crystal like thing in them... since they are formed from Lava
Divide by 1000
145÷1000=0.145
Hope this will be helpful.
Answer:
6.82 moles of Fe2O3
Explanation:
Step 1:
Determination of the number of mole of in 450g of CO2.
This is illustrated below:
Molar Mass of CO2 = 12 + (2x16) = 44g/mol
Mass of CO2 = 450g
Number of mole of CO2 =.?
Number of mole = Mass/Molar Mass
Number of mole of CO2 = 450/44 = 10.23 moles
Step 2:
Determination of the number of mole of Fe2O3 needed for the reaction. This is illustrated below:
2Fe2O3 + 3C—> 4Fe + 3CO2
From the balanced equation above,
2 moles of Fe2O3 reacted to produce 3 moles of CO2.
Therefore, Xmol of Fe2O3 will react to produce 10.23 moles of CO2 i.e
Xmol of Fe2O3 = (2x10.23)/3
Xmol of Fe2O3 = 6.82 moles
Therefore, 6.82 moles of Fe2O3 is required.
Answer:
The correct answer is option A.
Explanation:
Step 1 : Slow
Step 2: Fast
Step 3: Fast
When there is a recation which is taking place in a more that single steps than the rate of the reaction is determined by the slowest step occurring in the reaction mechanism.
So, according to question step 1 is slow step which means that rate of the reaction will be :
![R=k[ClO^-][H_2O]](https://tex.z-dn.net/?f=R%3Dk%5BClO%5E-%5D%5BH_2O%5D)
11.412 x 10^23.
EXPLANATION:
5.5 oz = 155.92 g
155.92 g x (1 mol/82.2 g) = 1.8956 mol
(6.02 x 10^23) x 1.8956 = 11.412 x 10^23
