Answer:
Here's what I get
Explanation:
(g) Titration curves
I can't draw two curves on the same graph, but I can draw two separate curves for you.
The graph in part (d) had an equivalence point at 20 mL.
In the second titration, the NaOH was twice as concentrated, so the volume to equivalence point would be half as much — 10 mL.
The two titration curves are below.
(h) Evidence of reaction
HCl and NaOH are both colourless.
They don't evolve a gas or form a precipitate when they react.
The student probably noticed that the Erlenmeyer flask warmed up — a sign of a chemical change.
Answer:
The correct answer would be 3. The number of atoms of each element in the reactants equals the number of atoms of each element in the products.
Explanation:
The law of conservation of matter states that energy cannot be created or destroyed, only transfered. Thus, option 3 is correct.
Flame emission is a method of chemical that uses intensity of light from a flame.
We want to write the nuclear equation for the beta decay of Aluminium-25.
The equation is:
![^{25}_{13}Al \implies ^{25}_{14}Si + ^{0}_{-1}e](https://tex.z-dn.net/?f=%5E%7B25%7D_%7B13%7DAl%20%5Cimplies%20%5E%7B25%7D_%7B14%7DSi%20%2B%20%20%20%5E%7B0%7D_%7B-1%7De)
First, as you may know, in a beta decay the number of protons is increased by one. Aluminium has 13 of them, so after the decay, we will have 14 protons.
This means that the aluminium will transform into silicon, then the nuclear equation is just:
![^{25}_{13}Al \implies ^{25}_{14}Si + ^{0}_{-1}e](https://tex.z-dn.net/?f=%5E%7B25%7D_%7B13%7DAl%20%5Cimplies%20%5E%7B25%7D_%7B14%7DSi%20%2B%20%20%20%5E%7B0%7D_%7B-1%7De)
Where the:
![^{0}_{-1}e](https://tex.z-dn.net/?f=%5E%7B0%7D_%7B-1%7De)
Is an electron, which is the emitted particle in the beta decay.
If you want to learn more, you can read:
brainly.com/question/4184205
I’m guessing you mean calcium?
Start off with a balanced equation:
2Ca + 2H20 ➡️ 2CaOH + H2
This is a limiting reactant problem. Solve for the amount of H2 gas produced with respect to each reactant using the mole ratio. The reactant that produces the least amount of H2 has is the answer.