it wasn't 75! it was 100, you had to find the moles of the H2 by dividing the volume by 24 and then using the ratio of moles and the 24 dm3 to find the volume of the HCL
Mg has fewer protons than Al hence Mg has weaker metallic bonds than Al. This means Mg requires less energy to break these points hence has a lower melting point.
adsorption and desorption of the gases also leads to more heat energy due to the catalyst surface
I wrote that the battery provides the suitable temperature for the catalyst to start functioning. Once this temperature is achieved, catalyst can speed up the rate of reaction so battery will not be required.
I wrote that the battery provides the suitable temperature for the catalyst to start functioning. Once this temperature is achieved, catalyst can speed up the rate of reaction so battery will not be required.
Idk if this answer even makes sense...
It would get 1 mark. Although depends upon the examiner. According to me you only gave 1 marking point
Ethane and propane are used to make ethene and propene by dehydrogenation reaction. This ethene and propene is used to make poly ethene and poly propene. But since, Ethane and Propane are required for the manufacture of Shane gas, the production of poly ethene and poly propene decreases.
For the catalyst question can we write that heating it provides the activation energy needed to initiate the reaction?
And for the helium question is it wrong if i mentioned it is less dense?
Oh my god I actually wrote that too about the activation energy. However I think you would also have to mention that it is an exothermic reaction and that's why it doesn't need to be heated for the second mark. I think you are correct about Helium being less dense because that implies that it's deflected the most and can therefore detect any leaks.