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OLEGan [10]
3 years ago
5

Witch of the following best describes a gene

Chemistry
2 answers:
stellarik [79]3 years ago
6 0

Answer:

DNA SEQUANCES WITH DNA PROTIENS

Explanation:

Inga [223]3 years ago
3 0

Answer:

DNA sequences with instructions for building proteins.

Please rate or heart if this helps!

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Earth's core is made mostly of
Natalka [10]

Answer:

iron and nickel

Explanation:

Deep inside the Earth's core, near the center is iron and nickel.

6 0
3 years ago
Read 2 more answers
Which of the following describes the products of a chemical reaction?
Goshia [24]

Answer:

B. The substances that are formed

Explanation:

a chemical reaction is a reaction that there's a formation of a new compound or substance.

can i have brainliest? and btw, let me know if you get it right! hope i helped <3

5 0
3 years ago
Phenolphthalein is used as a visual indicator in a strong acid-strong base titration because
marysya [2.9K]
A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions. ... It is known as the titrant.
3 0
3 years ago
A 25.225 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 75.815 g of wa
Rudik [331]

Answer:

1.43 (w/w %)

Explanation:

HCl reacts with NH3 as follows:

HCl + NH3 → NH4+ + Cl-

<em>1 mole of HCl reacts per mole of ammonia.</em>

Mass of NH3 is obtained as follows:

<em>Moles HCl:</em>

0.02999L * (0.1068mol / L) = 3.203x10-3 moles HCl = <em>Moles NH3</em>

<em>Mass NH3 in the aliquot:</em>

3.203x10-3 moles NH3 * (17.031g / mol) = 0.0545g.

Mass of sample + water = 22.225g + 75.815g = 98.04g

Dilution factor: 98.04g / 14.842g = 6.6056

That means mass of NH3 in the sample is:

0.0545g * 6.6056 = 0.36g NH3

Weight percent is:

0.36g NH3 / 25.225g * 100

<h3>1.43 (w/w %)</h3>
6 0
3 years ago
when the concentration of hydrogen ions in a solution is decreased by a factor of ten, the pH of the solution
Vladimir [108]

Answer:

Increases by 1

Explanation:

8 0
3 years ago
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