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lesya692 [45]
3 years ago
7

(will give brainliest!! please help me! thank you!)

Chemistry
1 answer:
just olya [345]3 years ago
6 0

Answer:

A two energy levels K and L

B halogen are present in group 17

C in same group elements have same valence electrons

Explanation:

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What is the pH if the [H+] concentration is 3 x10^-13​
Shkiper50 [21]

Answer:

pH = 12.52

Explanation:

Given that,

The [H+] concentration is 3\times 10^{-13}.

We need to find its pH.

We know that, the definition of pH is as follows :

pH=-log[H^+]

Put all the values,

pH=-log[3\times 10^{-13}]\\\\pH=12.52

So, the pH is 12.52.

6 0
3 years ago
Which statements describe how heat flows in foil? Check all that apply. Heat flows in all directions. Heat flows from left to ri
docker41 [41]

Answer:

A D F

Explanation:

Its right but its not in order But its A D and F

3 0
2 years ago
Force develops when two solutions each different concentration solutes separated semipermeable membrane
Zarrin [17]
Answer is: osmotic pressure.
Osmotic pressure, alongside the vapor pressure depression, freezing point depression and the boiling point elevation are<span> the </span>colligative properties od solution.
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3 0
3 years ago
How long does it take for a purple stem plant to grow
Gala2k [10]
I couldn't really find anything about the growth time but it does say that it could remain viable in soil for up to 40 years

4 0
4 years ago
Does anyone know how to do this?
Sloan [31]

Answer

find out the number of moles and use the molar ratio (numbers in front of formulas (in this case they are all 1) to determine how many moles of each product you are going to get theoretically

n=m/M is the equation to use to get moles here

30.8 gm/32.04 g/mol=0.9612 moles of the methanol and also of the formaldehyde so

0.9612 moles of the formaldehyde x molar mass (M) 30.73 g/mol= 29.54 gm which is the theoretical yield you already have the actual yield of 24.7 gm

then divide the actual by the theoretical to get the % yield which is 83.6%

Explanation:

4 0
3 years ago
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