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mezya [45]
3 years ago
10

Please help I need these answers

Chemistry
1 answer:
Burka [1]3 years ago
5 0

Answer:

2 a

element pure form cannot broken down

3 b

Chemical change chemical R×N

(R×N = reaction)

4c homogeneous solution

Yield = Yield (reaction yield): A measure of a chemical reaction's efficiency, as a ratio of moles of product to moles of reactant. Usually expressed as a percentage. % Yield = Moles of product.

Explanation:

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If you mixed three Dixie cups’ contents together containing 0.05L of 1.0M lemonade, 0.05L of 2.5M lemonade, and 0.05L of 0.5M le
viva [34]

Molarity of the resulting solution will be 1.33 M.

<u>Explanation:</u>

First we have to find the number of moles for each of the solution using the formula, moles = molarity × volume

For cup 1  = 1  M ×0.05 L = 0.05 moles

For cup 2 = 2.5 M × 0.05 L= 0.125 moles

For cup 3 = 0.5 M × 0.05 L = 0.025 moles

Total moles = 0.05 + 0.125 + 0.025  = 0.2 moles

We have to find the total volume as, 0.05 + 0.05 + 0.05 = 0.15 L

Now we have to find the molarity as, moles / volume = 0.2 moles/ 0.15 L = 1.33 M

3 0
3 years ago
P⁻³ electronic structure
lukranit [14]

Answer:

The phosphate anion (PO4 3-) represents the fully ionized form of phosphoric acid (H3PO4).

5 0
3 years ago
You forgot to ask a friend to water your plants while you were on vacation. When you got home you noticed they were wilting.
Naddika [18.5K]

Answer:

The appropriate answer is Turgor Pressure. Turgor pressure is also known as hydrostatic pressure and is the force of the water inside the cell of the plant that pushes the cell membrane against the cell wall. When this force is strong the cell or the plant is said to be turgid. This pressure is maintained by the process of osmosis.

Explanation:

Plants react differently to the stimulus of light. They will grow or turn leaves towards light.

Hope this helps : )

4 0
3 years ago
. only forms positive ions
4vir4ik [10]

Answer

alkali metals

Explanation:

metals of first and second group of periodic table have ability to donate electron and form positive ions

4 0
3 years ago
What is the total charge of 20 electrons in zeka-Coulombs?
Naily [24]

Answer:

3.2\times 10^{-18}\ C

Explanation:

No of electrons, n = 20

We need to find the total charge. We can use quantization of electric charge in this case.

Net charge,

q = ne

e is charge on an electron

q=20\times 1.6\times 10^{-19}\\\\q=3.2\times 10^{-18}\ C

So, there are 3.2\times 10^{-18}\ C of charge in 20 electrons.

3 0
4 years ago
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