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Aleksandr-060686 [28]
3 years ago
14

How many steps are in a scientific investigation?

Chemistry
2 answers:
AleksAgata [21]3 years ago
8 0
Theirs eight steps In Scientific investigation
timurjin [86]3 years ago
3 0
There are eight steps
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A chemist determines by measurements that 0.030 moles of nitrogen gas participate in a chemical reaction. calculate the mass of
zzz [600]
Remember that: 
number of moles = mass/molar mass

First, we get the molar mass of the nitrogen gas molecule:
It is known the the nitrogen gas is composed of two nitrogen atoms, each with molar mass 14 gm (from the periodic table)
Therefore, molar mass of nitrogen gas = 14 x 2 = 28 gm

Second we calculate the mass of the precipitate:
we have number of moles = 0.03 moles (given)
and molar mass = 28 gm (calculated)
Using the equation mentioned before,
mass = number of moles x molar mass = 0.03 x 28 = 0.84 gm
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3 years ago
What is a good indicator for titrating potassium hydroxide with hydrobromic acid?
Cerrena [4.2K]
Potassium hydroxide is a strong base and hydrobromic acid is a strong acid. This implies that the pH of the end-point [neutralization] of their titration will be around pH 7. A good indicator for this kind of pH is bromthymol blue. This is because this indicator changes its colour at pH 7.
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Explain your observations in term of how tempurature affects paritcle motion and how liquid changes to a solid
Rus_ich [418]

Answer:

See explanation

Explanation:

Temperature is defined as a measure of the average kinetic energy of the molecules of a body.

When a substance is heated, the kinetic energy of its molecules increases as the temperature increases; hence the particles of the substance moves faster with increasing temperature.

When heat is withdrawn from a liquid, the temperature decreases and the average kinetic energy of the molecules decreases. The molecules become less energetic hence the liquid changes into solid

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Calculate E∘cell for the following balanced redox reaction:<br><br> 2Cu(s)+Ca2+(aq)→2Cu+(aq)+Ca(s)
Neko [114]

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FOK I don’t know. I’ll come back to the question

Explanation:

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Which organelle is most directly related to cell division?
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centrioles

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i learned this a few yrs back. hope it helps! :)

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