All categories

3 years ago

This is a easy question.what does inertia mean?

Chemistry

1 answer:

neonofarm [45]3 years ago

7 0

Answer:

a tendency to do nothing or to remain unchanged.

Explanation:

You might be interested in

How many molecules are there in 2.30 grams of NH3

mixer [17]

<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We calculate as follows:

2.30 g NH3 (1 mol / 17.03 g ) (</span>6.022 x 10^23 molecules / 1 mol ) = 8.13x10^22 molecules

7 0

3 years ago

Your task is to create a buffered solution. You are provided with 0.10 M solutions of formic acid and sodium formate. Formic aci

Anton [14]

Answer:

15.2mL of the 0.10M sodium formate solution and 4.8mL of the 0.10M formic acid solution.

Explanation:

To find the pH of a buffer based on the concentration of the acid and conjugate base we must use Henderson-Hasselbalch equation:

pH = pKa + log [A⁻] / [HA]

<em>Where [A⁻] could be taken as moles of the sodium formate and [HA] moles of the formic acid</em>

<em />

4.25 = 3.75 + log [A⁻] / [HA]

0.5 = log [A⁻] / [HA]

3.162 = [A⁻] / [HA] <em>(1)</em>

As both solutions are 0.10M and you want to create 20mL of the buffer, the moles are:

0.10M * 20x10⁻³L =

2x10⁻³moles = [A⁻] + [HA] <em>(2)</em>

Replacing (2) in (1):

3.162 = 2x10⁻³moles - [HA] / [HA]

3.162 [HA] = 2x10⁻³moles - [HA]

4.162[HA] = 2x10⁻³moles

[HA] = 4.805x10⁻⁴ moles

[A⁻] = 2x10⁻³moles - 4.805x10⁻⁴ moles = 1.5195x10⁻³moles

That means, to create the buffer you must add:

[A⁻] = 1.5195x10⁻³moles * (1L / 0.10mol) = 0.0152L =

<h3>15.2mL of the 0.10M sodium formate solution</h3>

[HA] = 4.805x10⁻⁴ moles * (1L / 0.10mol) = 0.0048L =

<h3>4.8mL of the 0.10M formic acid solution</h3>

4 0

3 years ago

A gas has a volume of 25.6 L at a temperature of 278 K. What will be the new temperature, in C, if

Inessa05 [86]

<h2>Hello!</h2>

The answer is: -97.37° C

According to the Charles and Gay-Lussac's Law we have that:

$\frac{V}{T}=k$

Where:

<em>v</em> is the volume of the gas

<em>t</em> is the temperature of the gas

<em>k </em>is the proportionality constant

From the Gay-Lussac's Law we also have the following relation:

$\frac{V1}{T1}=\frac{V2}{T2}$

Since we need to find the new temperature (T2) we can use the last equation:

$\frac{V1}{T1}=\frac{V2}{T2}\\\\T2=\frac{V2*T1}{V1}=\frac{16.2L*278K}{25.6L}=175.92K$

We are asked to find the temperature in Celsius degrees, so, we must convert the result (in K) to Celsius degrees:

$Celsius=K-273.15=175.92-273.15=-97.37$

So, the temperature is -97.37° C

Have a nice day!

7 0

3 years ago

Which describes the relationship between a monomer and a polymer?

dexar [7]

A collection of monomers combines to form a polymer

Hope my answer helped! :D

4 0

3 years ago

Besides plants, do other organism get their energy directly from the Sun?<br> yes or no

Contact [7]

yes they doExplanation:

3 0

3 years ago

Read 2 more answers