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Sidana [21]
2 years ago
8

The pH of solution A is 7 and the pH of solution B is 5. Solution A has ____ times ______ hydrogen ion concentration compared to

solution B.
Chemistry
1 answer:
ollegr [7]2 years ago
5 0

Answer: 100, less

Explanation:

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How many moles of solid naf would have to be added to 1.0 l of 2.39 m hf?
sp2606 [1]
Molarity is one way of expressing concentration and is equal to the number of moles of the solute per liter of the solution. Therefore,

Molarity = 2.39 mol / L solution

2.39 ( 1.0) = 2.39 mol HF

Hope this answers the question.
6 0
3 years ago
ccording to the Bohr model of the atom, when an electron goes from a higher-energy orbit to a lower-energy orbit, it ________ el
marishachu [46]

Answer:

1. Absorbs electromagnetic energy

2. Energy difference between the two orbits.

Explanation:

Bohr precisely describe the processes of absorption and emission of energy in terms of electronic structure. According to Bohr's model, an electron would absorb energy in the form of photons to get excited to a higher energy level as long as the photon's energy was equal to the energy difference between the initial and final energy levels. After jumping to the higher energy level or the excited state, the excited electron would be in a less stable position, so it would quickly emit a photon to relax back to a lower, more stable energy level.

7 0
3 years ago
Different types of cells​
olga_2 [115]

Answer:

Epithelial cells, Nerve cells, muscle cells, and connective tissue cells

4 0
3 years ago
Read 2 more answers
Describe how to do a flame test on a sample of a salt
Katen [24]

Answer:Hope this helps!

Explanation:

You can use a flame test to help identify the composition of a sample. The test is used to identify metal ions (and certain other ions) based on the characteristic emission spectrum of the elements. The test is performed by dipping a wire or wooden splint into a sample solution or coating it with the powdered metal salt. The color of a gas flame is observed as the sample is heated. If a wooden splint is used, it's necessary to wave the sample through the flame to avoid setting the wood on fire. The color of the flame is compared against the flame colors known to be associated with the metals.

4 0
3 years ago
Is toothpaste suspension,colloid,solution?​
natima [27]

Answer:

Collid

Explanation:

Toothpaste is a colloid, because it's part solid and part liquid. ... A colloid is a heterogeneous mixture of two substances of different phases. Shaving cream and other foams are gas dispersed in liquid. Jello, toothpaste, and other gels are liquid dispersed in solid.

8 0
3 years ago
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