Answer:
- Not balanced.
- Reactants: Zn and HCI
.
- Products: ZnCl₂ and H₂.
- Substitution reaction.
Explanation:
Hello,
In this case, for the given reaction:
Zn + HCI → ZnCl₂ + H₂
We can see that it is not balanced due to the fact that at the left side we have one hydrogen atom whereas at the right side two, taking into account the number must be same as well as chlorine. Thus, in order to balance we write:
Zn + 2HCI → ZnCl₂ + H₂
And that is enough. Moreover, we can see that the chemical species at the left side of the equation are the reactants and those at the right side the products, thus we have:
Reactants: Zn and HCI
.
Products: ZnCl₂ and H₂.
Finally, since we can see that the chlorine is at the reactants with hydrogen, but at the end with the zinc, and the initial zinc is alone as well as the yielded hydrogen we can infer this is a substitution reaction.
Best regards.
I believe it is stable and it is a nobel gas (group 18)
Avogadro Number of molecules is contained in 1 mole of water
6.02 * 10²³ molecules are contained in 1 mole of water.
2 * 10²² molecules will contain: (1* 2 * 10²²) / (<span>6.02 * 10²³)
</span>
≈ 0.0332 mole of Water.
Following reaction takes place between LiOH and HNO3
LiOH + HNO3 → LiNO3 + H2O
Thus, 1 mole of LiOH reacts with 1 mole of HNO3 to form 1 mole of LiNO3.
Now,
Number of millimoles of LiOH consumed = <span>36.90 X 0.100 = 3.690
</span>∴Number of millimoles of HNO3 present = 3.690
<span>
Now, Molarity of HNO3 = </span>
=
= 0.0738 M
Thus, <span>
molarity of the HNO3 solution is 0.0738 M</span>
Answer:
0.60
Explanation:
pH = - log[H+]
[HCl] = [H+] = 0.25 M, because HCl is strong acid, so it dissociates completely.
PH = -log[0.25] = 0.60