Answer:
90 kilojoules of heat energy
Explanation:
I don't really know why this is just the answer to it on my quiz so if someone else can explain.
48.1 grams.
<h3>Explanation</h3>
How many moles of the reaction is needed to provide that 335 kJ of heat?
- ΔH = -824.2 kJ / mol according to the equation. In other words, each mole of the reaction releases 824.2 kJ of heat. (The value of ΔH is negative, which means that the reaction produces energy.)
- 335 / 842.2 = 0.4307 mol. It takes 0.4307 moles of the reaction <em>shown in the equation</em> to produce all the 335 kJ of heat.
How many moles of iron, Fe in 0.4307 moles of the reaction?
- The coefficient in front of Fe in the equation is two. As a result, each mole of this reaction would consume two moles of Fe. The 0.4307 moles of the reaction will consume 2 × 0.4307 = 0.861 moles of Fe to produce 335 kJ of heat.
What's the mass of 0.8614 moles of iron, Fe?
- Refer to a modern periodic table, the relative atomic mass of iron Fe is 55.85. As a result, the mass of one mole of iron Fe is 55.85 grams.
- 0.861 × 55.85 = 48.1 grams. Therefore, it takes 48.1 grams of iron to provide 335 kJ of heat through this reaction.
The mechanism of said reaction is shown below.
The Nitrile on reaction with Grignard reagent and followed by hydrolysis yields Imine.
Imine on acid hydrolysis yields Ketone, Ammonia and Water. The overall mechanism is as follow,
Answer:
hope this helps :)
Explanation:
for the first one, you can look at the periodic table and look at the atomic number and it will show you how many protons there are giving you the answer because protons and electrons are equal in a pure element
a- carbon
b- neon
c- boron
d- oxygen
e- helium
f- hydrogen
g- lithium
h- beryllium
i- nitrogen
1- sulfur
2- S
3- 16
4- 32.066
5- 16
6- 16
7- 16.066
8- draw circles and put 16 dots like on the other page and in the middle put 16 nuetrons and electrons
9- 6 i think