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garik1379 [7]
4 years ago
5

Geologic time is a way to _______.

Chemistry
2 answers:
olga nikolaevna [1]4 years ago
4 0

Answer: B

Explanation:

blsea [12.9K]4 years ago
3 0

Answer:

The answer is B! (Measure the sequence of events on Earth over time.)

I took the test!

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u got a me off guard and thought sum else, lol but um a marble?

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does the mean molecular speed chnage as much as the temperature as the water heats up? explain please help
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Explanation:

When water is heated up then its molecules move rapidly from one place to another. Hence, kinetic energy of the molecules tend to increase.

Also,   K.E = \frac{3}{2}kT

where, T = temperature

Therefore, more is the increase in temperature more will be the mean molecular speed change in the water molecules.

As a result, mean molecular speed change increases with increase in temperature and vice-versa.

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Plz help me solve this question is it A,B,C or D
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Hydrochloric acid reacts with sodium hydroxide to form sodium chloride (the salt) and water. Sodium chloride is made up of Na+ cations from the base (NaOH) and Cl- anions from the acid (HCl). HCl+NaOH→H2O+NaCl.

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a sample of gas initially occupies 5.50 liter at a pressure of 0.750 atm at 13.0 C. what will the temperture change to 22.5 C an
sergey [27]

Answer:

The pressure will be 2.84 atm

Explanation:

The gas laws are a set of chemical and physical laws that allow us to determine the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.

Boyle's law indicates that the volume is inversely proportional to the pressure: if the pressure increases, the volume decreases and if the pressure decreases, the volume increases. Boyle's law is expressed mathematically as:

P * V = k

On the other hand, Charles's law indicates that with increasing temperature, the volume of the gas increases and with decreasing temperature, the volume of the gas decreases. That is, they are directly proportional. This is expressed mathematically as:

\frac{V}{T} =k

Finally, the Gay-Lussac law says that at constant volume, the pressure of the gas is directly proportional to its temperature. Mathematically, it is expressed as:

\frac{P}{T} =k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\frac{P*V}{T}=k

When you want to study two different states, an initial and a final one of a gas, you can use the following expression:

\frac{P1*V1}{T1}=\frac{P2*V2}{T2}

In this case:

  • P1= 0.750 atm
  • V1= 5.50 L
  • T1= 13 C= 286 K (being 0 C=273 K)
  • P2=?
  • V2= 1.50 L
  • T2= 22.5 C=295.5 K

Replacing:

\frac{0.750 atm*5.50 L}{286 K}= \frac{P2*1.50 L}{295.5 K}

Solving:

P2=\frac{295.5K}{1.50L} *\frac{0.750 atm*5.50 L}{286 K}

P2= 2.84 atm

<u><em>The pressure will be 2.84 atm</em></u>

8 0
4 years ago
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