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ICE Princess25 [194]
2 years ago
5

What is the fusing inside the sun to make helium

Chemistry
2 answers:
Eddi Din [679]2 years ago
8 0
The answer is d. hydrogen nuclei.
lawyer [7]2 years ago
6 0
By nuclear fusion of hydrogen nuclei into Helium
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A chemical indicator that changes colors depending on the concentration of h+ in the solution is called a
DanielleElmas [232]
Answer is: acid-base indicator or pH indicators.

Acid-base indicators are usually weak acids or bases and they are chemical<span> detectors for hydrogen or hydronium cations.</span>
Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄). Phenolphthalein is <span>colorless in </span>acidic<span> solutions and pink in </span>basic<span> solutions.
Another example is m</span><span>ethyl orange. It is red colour in acidic solutions and yellow colour in basic solutions.</span>

3 0
3 years ago
How many molecules are contaiined in 125 grams of water, H2O?
vladimir1956 [14]

Answer:

Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g . 2.7144moles H2O ⋅6.022⋅1023molec.

Explanation:

7 0
2 years ago
What is the reactivity trend of halogens?
RSB [31]
Reactivity trends of halogen:

1) Melting point and boiling points increased down the
group

2) Colour becomes darker.
E.g. Fluorine (pale yellow)
Chlorine (yellowish-green)
Bromine (reddish-brown)
Iodine (purplish-black)
Astatine (black)

3) The reactivity decreases down the group.
Reactivity:
F > Cl > Br > I > At
3 0
3 years ago
Is weathering a physical or chemical change, and why?
kumpel [21]
Weathering would be chemical because it's more natural than physical
7 0
3 years ago
Draw the products formed from 2-methyl-2-butene by sequences (1.) and (2.). hydroboration followed by oxidation with alkaline hy
nata0808 [166]

Answer:

product won't form hydrogen bond with water

Explanation:

6 0
3 years ago
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