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Mnenie [13.5K]
2 years ago
12

One container is filled with argon gas and the other with krypton gas. If both gases have the same temperature, in which contain

er are the atoms moving faster?
Chemistry
1 answer:
alina1380 [7]2 years ago
7 0

Answer:

Argon

Explanation:

The average kinetic energy of the particles in a gas is given by

KE=\frac{1}{2}mv^2

where

m is the mass of the particles

v is their rms speed

The average kinetic energy of the particles in a gas can also be written as

KE=\frac{3}{2}kT

where

k is the Boltzmann's constant

T is the absolute temperature of the gas

Combining the two equations,

\frac{1}{2}mv^2=\frac{3}{2}kT

We can re-write the equation as

v=\sqrt{\frac{3kT}{m}}

We see that:

- The speed is directly proportional to the square root of the temperature

- The speed is inversely proportional to the square root of the mass of the particles

Therefore, if the two gases are at same temperature, the particles will move faster in the gas with lighter particles (smaller mass).

Since Krypton atoms have larger mass than Argon atoms, it means that atoms in Argon move faster than in Krypton.

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Consider this reaction:
Brilliant_brown [7]

Answer : The oxidation state of Mg in Mg(s) is (0).

Explanation :

Oxidation number or oxidation state : It represent the number of electrons lost or gained by the atoms of an element in a compound.

Oxidation numbers are generally written with the sign (+) and (-) first and then the magnitude.

Rules for Oxidation Numbers are :

The oxidation number of a free element is always zero.

The oxidation number of a monatomic ion equals the charge of the ion.

The oxidation number of  Hydrogen (H)  is +1, but it is -1 in when combined with less electronegative elements.

The oxidation number of  oxygen (O)  in compounds is usually -2.

The oxidation number of a Group 17 element in a binary compound is -1.

The sum of the oxidation numbers of all of the atoms in a neutral compound is zero.

The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion.

The given chemical reaction is:

Mg(s)+2H_2O(l)\rightarrow Mg(OH)_2(s)+H_2(g)

In the given reaction, the oxidation state of Mg in Mg(s) is (0) because it is a free element and the oxidation state of Mg in Mg(OH)_2 is (+2).

Hence, the oxidation state of Mg in Mg(s) is (0).

3 0
2 years ago
What is the SI unit used to measure the temperature of a substance?
navik [9.2K]

The SI unit for temperature is Kelvin.

7 0
2 years ago
The bonds in the reactants of Figure 7-3 contained 372 kJ of chemical energy and the bonds in the products contained 350 kJ of c
satela [25.4K]

Answer: 22 kJ amount of energy is released in the following reaction.

Explanation: There are two types of reaction on the basis of amount of heat absorbed or released.

1. Endothermic reactions: These are the type of reactions in which reactants absorb heat to form the products. The energy of the reactants is less than the energy of the products.

2. Exothermic reactions: These are the type of reactions in which heat is released from the chemical reactions. The energy of the products is less than the reactants.

Sign convention for \Delta H: This value is negative for exothermic reactions and positive for endothermic reactions.

For the given chemical reaction,

Energy of the products is less than the energy of the reactants, Hence, this reaction will be a type of exothermic reaction and energy will be released during this chemical change.

Amount of energy released = (350 - 372) kJ = -22kJ

Negative sign symbolizes the energy is being released. So, 22 kJ amount of energy is released in the following reaction.

6 0
2 years ago
PLEASE HELP ASAP! very much appreciated
soldier1979 [14.2K]

Answer:

-Unknown

Explanation:

Questions is not seen properly bro

3 0
1 year ago
A compound was found to be soluble in water. It was also found that addition of acid to an aqueous solution of this compound res
gogolik [260]

Answer:

c. Cr

Explanation:

Cr^3+(aq) + CO_3^2-(aq) ------------> Cr_2CO_3(s)

The compound is containing CO_3^2- ion.

If acid reacts with it, CO_2 evolves.

H^+ + CO_3^2- ----------> H_2O + CO_2

therefore,  Cr would form a precipitate when added to an aqueous solution of this compound. Cr2CO3 is the precipitate.

3 0
3 years ago
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