All categories

3 years ago

What is the mass number of an element with an atomic number 10 and 10 neutrons

Chemistry

2 answers:

Bogdan [553]3 years ago

8 0

Answer:

Neon

Explanation:

LenKa [72]3 years ago

5 0

hskamamsahaksnavshaiaaa

irieiwkaaj

You might be interested in

A 0.870 g sample of a monoprotic acid is dissolved in water and titrated with 0.300 M KOH.

Vedmedyk [2.9K]

<u>Answer:</u> The molar mass of monoprotic acid is 126.1 g/mol

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

Molarity of KOH solution = 0.300 M

Volume of solution = 23.00 mL

Putting values in above equation, we get:

$0.300M=\frac{\text{Moles of KOH}\times 1000}{23.00}\\\\\text{Moles of KOH}=\frac{0.300\times 23.00}{1000}=0.0069moles$

The chemical equation for the reaction of monoprotic acid and KOH follows:

$HA+KOH\rightarrow KA+H_2O$

By Stoichiometry of the reaction:

1 mole of KOH reacts with 1 mole of HA

So, 0.0069 moles of KOH will react with = $\frac{1}{1}\times 0.0069=0.0069$ moles of HA

To calculate the molar mass for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of HA = 0.870 g

Moles of monoprotic acid = 0.0069 mol

Putting values in above equation, we get:

$0.0069mol=\frac{0.870g}{\text{Molar mass of monoprotic acid}}\\\\\text{Molar mass of monoprotic acid}=\frac{0.870g}{0.0069mol}=126.1g/mol$

Hence, the molar mass of monoprotic acid is 126.1 g/mol

3 0

3 years ago

If you are playing pool and hit the cue ball at the stationary 8 ball, what should happen?

jolli1 [7]

Answer If a ball goes into a pocket and bounces back on to the playing surface, it is not considered pocketed. If it is the 8-ball, it is not a win. If it is the cue ball, it is not a scratch.

Explanation:

3 0

3 years ago

A procedure involving removal of the coronal portion of an exposed vital pulp is a

sesenic [268]

Answer:

ExplanaPulpotomy is a vital pulp therapy in which the coronal portion of the pulp is removed surgically and the remaining radicular pulp is preserved intact. Over the remaining radicular pulp tissue, a suitable material is placed which has the potential to protect the pulp from further insult and initiate healing and repairtion:

5 0

3 years ago

Read 2 more answers

What type of energy sources don't cause pollution? Can you name at least 3 ? Thanks!!!

Lisa [10]

Solar Energy

Wind Energy

Geothermal Energy

Here are 3 energy sources that don't cause pollution, <em>I hope this helps.</em>

6 0

3 years ago

Define all the physical features of earth

Aleks [24]

<h3>The features discussed are: Plateaus, deserts, deltas, mesas, basins, foothills, marshes, and swamps. Plateaus are elevated regions that are flat on top. Deserts are large areas that receive less than 10 inches of precipitation a year. Antarctica is the world's largest desert.Geography Landforms & Physical Features. Our Earth is made up of a many different types of landforms. ... Mountains. Mountains are large, tall, and elevated land areas on the earth's surface that rise abruptly from the surrounding land area. .</h3>

<h2>hope it helps</h2><h2>stay safe healthy and happy.....</h2>

5 0

3 years ago

Read 2 more answers