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4 years ago

Which changes can reach dynamic equilibrium

Chemistry

1 answer:

soldier1979 [14.2K]4 years ago

5 0

Answer:

D - chemical and physical

Explanation:

Only chemical and physical changes can reach the level of dynamic equilibrium. Nuclear reactions cannot reach dynamic equilibrium.

A system is in dynamic equilibrium when the rate of forward reaction is the same as that of backward reaction in a reversible reaction.
Nuclear reactions cannot be reversed.
Dynamic equilibrium is prominent in chemical reactions. It is commonly found that as a reaction occurs, the backward and forward reactions can reach equilibrium levels.
In physical changes, this can also occur when certain conditions of pressure and temperatures are satisfied.

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Most of the organic compunds burn to give CO2 and H2O

2C2H2 + 5O2 = 4CO2+ 2H2O

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4 years ago

Difference between NaOH and HCI

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3 years ago

Read 2 more answers

1. What is the density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm?

qwelly [4]

Answer:

0.087 g/cm^3

Explanation:

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3 years ago

Describe how you use conduction to make your s'mores

telo118 [61]

Answer:

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4 years ago

To gain an idea as to how many atoms are in a gram or so of copper, use the larger balance

anygoal [31]

Answer:

Explanation:

To solve this problem, we must understand the relationship between mass of a substance and the number of atoms.

Atoms are the smallest indivisible particles of any matter. A substance can be made up of several number of atoms in their space.

The mass of any substance is a function of the amount of atoms its contains.

The mass of a substance is related in chemistry to the amount of atoms its contains using the parameter called the number of moles.

A mole is the amount of substance that contains the Avogadro's number of particles. This number is 6.02 x 10²³ particles. The particles here can be protons, neutrons, electrons, atoms e.t.c.

Now,

Number of moles = $\frac{mass}{molar mass}$

Molar mass of copper = 63.6g/mole

Number of moles = $\frac{2}{63.6}$ = 0.03mole

Since 1 mole of a substance contains 6.02 x 10²³atoms

0.03 mole of copper will contain 0.03 x 6.02 x 10²³atoms

= 1.89 x 10²² atoms

He needs to add 1.89 x 10²² atoms to make 2g of the sample.

7 0

3 years ago