Help help pleaseeeee

Chemistry

2 answers:

Flauer [41]3 years ago

8 0

It’s freezing I’m pretty sure

m_a_m_a [10]3 years ago

4 0

The answer is the first one

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What is the molarity of a solution prepared by dissolving 30.0 grams of NaOH in enough water to make a solution with a total vol

Simora [160]

Answer:

$\fbox{0.3125 M}$

Given:

Given mass of NaOH = 30 gram
Molar mass of NaOH = 40 gram
Volume = 2.40 litres

To find:

Molarity = ?

Solution:

Molarity is nothing but the number of moles of solute dissolved in per litre of solution. given by formula,

$Molarity = \frac{given \: mass}{molar \: mass \times Volume}$

$\sf Molarity \: = \frac{30}{40 \times 2.4} = 0.3125 \: M$

$\small\sf Thanks \: for \: joining \: brainly \: community!$

7 0

2 years ago

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 $(CH_{4})$ .