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wel
3 years ago
13

Why might a scientist repeat an experiment if she did not make a mistake in the first one? A) Scientists who repeat experiments

make the most money. B) It helps ensure the results are consistent and repeatable. C) Repeating ensures the expected results match the hypothesis. D) It helps find portions that can be skipped with the same results.
Chemistry
1 answer:
9966 [12]3 years ago
3 0

Answer:

The correct answer is B) it helps to ensure the result are consistent and repeatable.

Explanation:

Scientist generally repeat an experiment if he or she did not make a mistake in the first one to compare the results of two experiment, if there is no difference in the result or values obtainted from the observation of two experiment. he or she become sure that experiment was done in a right way because if there is some error made when experiment was carried out then the result of two same experiment would be different.

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Which of the following is TRUE? A) The equivalence point is where the amount of acid equals the amount of base during any acid-b
liberstina [14]

Answer:

the correct option is B

Explanation:

The correct option is b, since if we reach pH 7, it means that the acid-base reaction is neutralized, therefore the base has been neutralized by an acid or vice versa, without taking into account the proteins or the amounts of both components .

5 0
3 years ago
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Determine the percentage composition (by mass) of oxygen in NH4NO3.
Brrunno [24]

Answer:

60%

Explanation:

M(NH4NO3) = 2*14 +4*1 +3*16 = 80 g/mol

M(3O) = 3*16 = 48 g/mol

(48/80) *100 % =60% oxygen by mass.

6 0
3 years ago
A gaseous mixture contains 5.0 moles of nitrogen and 10.0 moles of helium . What is the total pressure if the temperature is 25
jolli1 [7]

Answer:

A) 122 atm

Explanation:

PV = nRT

Solve for P --> P = nRT/V

n = 10.0 mol + 5.0 mol = 15.0 mol

R = 0.08206 L atm / mol K

T = 25 + 273 = 298 K

V = 3.0

P = (15.0)(0.08206)(298) / (3.0) = 122 atm

6 0
2 years ago
Which is capable of housing while they conduct research
jeka94

Answer:

A space station

Explanation:

A space station provides an avenue for scientist to orbit the space and carryout scientific findings. Most space stations are usually controlled under agreement between different countries. The international space station is one such example.

A rover is usually a robotic device that has been pre-programmed and equipped with state of the art devices to carryout explorations on their own.

Most space observations are usually powerful telescopes on the earth surface that monitors events in space.

A satellite is a body that orbits another.

4 0
3 years ago
Read 2 more answers
How many atoms are in 5.62 moles of Mercury?
Maslowich

Answer:

3.384364 time 10^24 atoms

Explanation:

multiply by avogadro's number

4 0
2 years ago
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