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4 years ago

Which temperature represents the highest average kinetic energy of the particles in a sample of matter ?

1 answer:

6 0

Average kinetic energy is proportional to absolute temperature. This means that the higher the temperature the higher the kinetic energy.

This equation reflects that: KE avg = [3/2]kT, where k is the Boltzman constant.

So, you just have to checkg which of the given temperatures is the highest one..

Of course to compare you need to have them all in the same unit system.

Use absolute temperatures in Kelvin.

=> 27°C + 273.15 = 300.15 K.

Then, the highest temperature is 27°C and that represents the highest kinetic energy.

Answer is the option c. 27°C

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Why the two isotopes of bromine have the same chemical properties.

nalin [4]

Answer:

Isotopes of bromine have same chemical properties because they have same number of electrons.

Isotopes have only different number of mass that does not affect it's chemical properties too much.

3 0

3 years ago

When the same or different atoms combine together, you have a:

Alex73 [517]

Answer:

D.) molecule

<h3>When the same or different atoms combine together they for a molecule</h3>

3 0

3 years ago

354.5 g of chlorine gas is held with a fixed volume of 70.0 L. What is the pressure of the gas in atmospheres if it’s temperatur

zaharov [31]

Answer: The pressure of the gas in atmospheres is 1.76

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = ?

V = Volume of gas = 70.0 L

n = number of moles = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{354.5g}{71g/mol}=5moles$

R = gas constant = $0.0821Latm/Kmol$

T =temperature = $30.0^0C=(30.0+273)K=300.0K$

$P=\frac{nRT}{V}$

$P=\frac{5\times 0.0821Latm/K mol\times 300K}{70.0L}=1.76$

Thus the pressure of the gas in atmospheres is 1.76

7 0

3 years ago

Look at the reaction below. H₂SO₄(aq) + Ca(OH)₂(aq) ---> CaSO₄(aq) + 2H₂O(/) Which substance is the base in the reaction?

Lelu [443]

Ca(OH)2 (aq) because of elements oxygen and hydrogen

4 0

3 years ago

Read 2 more answers

Postlab Questions (2 pts ea; 8 pts total be specific and answer all in complete sentences): 1. How would you distinguish benzald

slega [8]

Answer:

Using the Iodoform test, we can differentiate both compounds.

Explanation:

Benzaldehyde (C6H5CHO -an aldehyde) and Acetophenone (C6H5COCH3 - a methyl ketone) can be differentiated by reacting both compounds with iodine in a basic (NaOH) solutions.

The methyl ketone (acetophenone) gives a pale yellow precipitate of triiodomethane (iodoform) while the aldehyde (benzaldehyde) would not react.

This is known as the IODOFORM test and is indicative for methyl ketones

7 0

3 years ago