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andre [41]
3 years ago
6

Which of the following shows a valid combustion reaction?

Chemistry
1 answer:
Strike441 [17]3 years ago
8 0

Answer:

May be third one because of the formation of H2(hydrogen)on the product side.

You might be interested in
A solution of a base differs from a solution of an acid in that the solution of a base?A. is able to conduct electricity B. is a
Anon25 [30]

Answer:

  • <u><em>Option D. has a great [OH⁻]</em></u>

Explanation:

1) Both <em>acids</em> and <em>bases</em> ionize in aqueous solutions so they are able to <em>conduct electricity</em>.

The ions, being charged particles, when flow through the solution are charge carriers, then they conduct electricity.

So, the option A does not state a difference between a solution of a base and a solution of an acid.

2) Both acids and bases are able to cause an <em>indicator color change</em>.

The usufulness of the indicators is that they are able to change of color when the pH changes either from acid to basic or from basic to acid. There are different indicators because none is suitable for the whole range of pH, but the statement B is not how solutions of base and acids differ.

3) The model of Arrhenius for acids and bases states that an acid is a substance that ionizes in water releasing H⁺ ions (this is equivalent to H₃O⁺) and a base is a substance that releases OH⁻ ions in water. Then, acids have a greater concentration of H₃O⁺ (so option C is not true for a solution of a base) and bases  have a greater concentraion of OH⁻, making the option D. true.

8 0
3 years ago
3. Which of the following are examples of chemical changes? Select all that apply.
Kruka [31]

Answer:

wood burning and cookies baking

Explanation:

took the test <333

3 0
3 years ago
The half life of radium-226 is 1600 years. How many grams of a 0.25g sample will remain
myrzilka [38]

Answer:

Explanation:

half life = 1600 years .

m = M  x ( \frac{1}{2} )^n

m is mass of the radioactive object after n half lives , M is original mass.

n = 4800 / 1600

= 4

Putting the valus of n and M we have

m = .25 x ( \frac{1}{2} )^3

= .03125 g .

4 0
3 years ago
What type of bond forms between h and br?
andreev551 [17]
Polar covalent bond
4 0
3 years ago
Can you help me with this i don't think it is that hard i just have a lot on my mind.
ivolga24 [154]

Answer:

Global wind

Explanation:

The jet streams go around the whole earth from west to east

Hope you have a good day :)

8 0
3 years ago
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