Answer:
233, 92 U
Explanation
I agree with your answer of 233 for the mass number (top number), but for the atomic number (bottom number) we need:
x + -1 = 91
Add 1 to both sides
x=92
Answer:
1.40 moles.
Explanation:
The balanced chemical equation for the reaction of Phosphorus and Oxygen is as follows -
![4P + 5O_2 = 2P_2O_5](https://tex.z-dn.net/?f=4P%20%2B%205O_2%20%3D%202P_2O_5)
In Part A, the oxygen was taken in excess. So Phosphorus will be the limiting reagent.
Since, 2 moles of
is formed by 4 moles of ![P](https://tex.z-dn.net/?f=P)
So, for 1.8 moles of
amount of required moles of
=
In Part B, the phosphorus was taken in excess so oxygen will be the limiting reagent.
Since, 2 moles of
is formed by 5 moles of oxygen
So, for 1.40 moles of
moles of
required = ![\frac{5}{2} \times 1.40 = 3.50](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B2%7D%20%5Ctimes%201.40%20%3D%203.50)
Thus as of now we have 3.60 moles of
and 3.50 moles of
.
As in the reaction of formation of
, oxygen is the limiting reagent.
So the moles of
formed by the 3.50 moles of oxygen will be
=
= 1.40 moles.
Based on the compounds given, I can say that the substance that is considered essential in the plastic making is NITRIC ACID. This substance is also known as aqua fortis and spirit of niter wherein this decomposes into oxides of nitrogen and water. The answer would be the last option. Hope this helps.
We can collect a sample of that food and add a drop of blue litmus solution. If the color of the litmus solution changes to red, it contains an acid as one of its ingredients.