Is atomic mass and molar mass same?

Chemistry

1 answer:

Sedaia [141]3 years ago

3 0

Answer:

Atomic mass is the mass of an atom and is given in a.m.u. (atomic mass unit).

Explanation:

Atomic mass is the mass of an atom and is given in a.m.u. (atomic mass unit). However, a molar mass is the mass of one mole atoms or molecules and is given in grams. Sodium atom has a mass of 23 a.m.u. however, the molar mass of sodium is 23g/mol.

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The compound trimethylamine, (CH3)3N, is a weak base when dissolved in water. Write the Kb expression for the weak base equilibr

GREYUIT [131]

Answer:

The $K_b$ expression for the weak base equilibrium is:

$K_b=\frac{[(CH_3)_3NH^+][OH^-]}{[(CH_3)_3N]}$

Explanation:

$(CH_3)_3N(aq)+H_2O(l)\rightlefharpoons (CH_3)_3NH^++OH^-(aq)$

The expression of the equilibrium constant of base $K_c$ can be given as:

$K_c=\frac{[(CH_3)_3NH^+][OH^-]}{[(CH_3)_3N][H_2O]}$

] $K_b=K_c\times [H_2O]=\frac{[(CH_3)_3NH^+][OH^-]}{[(CH_3)_3N]}$

As we know, water is pure solvent, we can put $[H_2O]=1$

$K_b=K_c\times 1=\frac{[(CH_3)_3NH^+][OH^-]}{[(CH_3)_3N]}$

So, the the $K_b$ expression for the weak base equilibrium is:

$K_b=\frac{[(CH_3)_3NH^+][OH^-]}{[(CH_3)_3N]}$

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3 years ago

A metal in group 1 of the periodic table can become a chemically stable ion by

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Bonding ionically with a group 7 non-metal

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4 years ago

3 difference between Homogeneous mixture and Heterogeneous Mixture

miv72 [106K]

Answer:

Difference between Homogeneous mixture and Heterogeneous Mixture are as follows:

A mixture or sample that is consist of uniform composition and properties is called a homogeneous mixture while a mixture or sample that is consist of different composition and properties is called a heterogeneous mixture.
Homogenous mixture has only single phase while heterogeneous mixture has two or more phases.
Homogenous mixture can not be separated by physical methods while heterogeneous mixture can be separated out physically.
Example of homogenous mixture is Water and sugar and heterogeneous mixture is oil and water.

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Calculate the mass of one atom of zinc in grams. (Hint: g/particle)

USPshnik [31]

Answer: $10.17\times 10^{-23}g$

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.