Magnesium hydroxide (Mg(OH)2): g/mol

2 answers:

8 0

To determine the molar mass, you need to get the atomic mass of the molecule. To do this, check the periodic table for the atomic mass or average atomic weight of each element.

Mg = 24.305 x 1 = 24.305 amu

O = 15.9994 x 2 =31.9988 amu

H = 1.0079 x 2 = 2.0158 amu

Then, add all the components to get the atomic mass of the molecule.

24.305 amu + 31.9988 amu + 2.0158 amu = 58.3196 amu

The atomic mass is just equivalent to its molar mass.

So, the molar mass of Magnesium hydroxide (Mg(OH)2) is 58.3196 g/mol.

Bumek [7]3 years ago

6 0

Answer:
molar mass of Mg(OH)2 = 58.305 grams/mole

Explanation:
From the periodic table:
atomic mass of Mg = 24.305 grams
atomic mass of oxygen = 16 grams
atomic mass of hydrogen = 1 gram

Now the given compound has:
1 mole of Mg, 2 moles of oxygen and 2 moles of hydrogen
Therefore:
molar mass of Mg(OH)2 = 24.305 + 2(16) + 2(1) = 58.305 grams/mole

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Arrange these compounds by their expected boiling point. Highest boiling point Lowest boiling point CH3OH, CH3CI CH4.

PSYCHO15rus [73]

Answer: The given compounds are arranged according to decreasing boiling point as $CH_{3}OH > CH_{3}Cl > CH_{4}$ .

Explanation:

The temperature at which vapor pressure of a substance becomes equal to the atmospheric pressure is called boiling point.

Stronger is the intermolecular forces present the atoms of a molecule more heat will be required by it to break the bond between its atoms. Hence, more will the boiling point of the molecule.

In $CH_{3}OH$ (methanol), there is hydrogen bonding present which is a stronger force. So, it will have highest boiling point as compared to $CH_{3}Cl$ and $CH_{4}$ .

In $CH_{3}Cl$ (chloroform), there is more electronegative atom attached (Cl) is attached to less electronegative atom (C and H). So, electrons are more pulled towards the chlorine atom. So, boiling point of $CH_{3}Cl$ is more than methane $(CH_{4})$ .