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3 years ago

Choose two different particles found in the air. Explain how they are different and how they are the same

Chemistry

1 answer:

BARSIC [14]3 years ago

6 0

Answer:

Dust and smoke.

Explanation:

Dust and smoke are two different particles present in the air. Dust and smoke are different from one another due to their origin. Smoke formed from burning of materials while dust refers to the soil particles lifted by the wind due to their light weight. Dust and smoke are similar to each other due to their small in size, infinite number means uncountable and light weight.

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CaCO3(s) ∆→CaO(s) + CO2(g).

sveta [45]

Answer:

74.9%.

Explanation:

Relative atomic mass data from a modern periodic table:

Ca: 40.078;
C: 12.011;
O: 15.999.

What's the <em>theoretical</em> yield of this reaction?

In other words, what's the mass of the CO₂ that should come out of heating 40.1 grams of CaCO₃?

Molar mass of CaCO₃:

$M(\text{CaCO}_3) = 40.078 + 12.011 + 3 \times 15.999 = 100.086\;\text{g}\cdot\text{mol}^{-1}$ .

Number of moles of CaCO₃ available:

$\displaystyle n(\text{CaCO}_3) =\frac{m}{M} = \frac{40.1}{100.086} = 0.400655\;\text{mol}$ .

Look at the chemical equation. The coefficient in front of both CaCO₃ and CO₂ is one. Decomposing every mole of CaCO₃ should produce one mole of CO₂.

$n(\text{CO}2) = n(\text{CaCO}_3)= 0.400655\;\text{mol}$ .

Molar mass of CO₂:

$M(\text{CO}_2) = 12.011 + 2\times 15.999 = 44.009\;\text{g}\cdot\text{mol}^{-1}$ .

Mass of the 0.400655 moles of $\text{CO}_2$ expected for the 40.1 grams of CaCO₃:

$m(\text{CO}_2) = n\cdot M = 0.400655 \times 44.009 = 17.632\;\text{g}$ .

What's the <em>percentage</em> yield of this reaction?

$\displaystyle \textbf{Percentage}\text{ Yield} = \frac{\textbf{Actual}\text{ Yield}}{\textbf{Theoretical}\text{ Yield}}\times 100\%\\\phantom{\textbf{Percentage}\text{ Yield}} = \frac{13.2}{17.632}\times 100\%\\\phantom{\textbf{Percentage}\text{ Yield}} =74.9\%$ .

7 0

3 years ago

What item would you use to pour medium amounts of liquid

svp [43]

PVA glue or elmers glue PVA Glue does all the basics fairly well, and has all the binding ability you'd expect from an adhesive.

6 0

4 years ago

Elements in group 16 want to bond with elements in group ___.

Trava [24]

Answer:

Two

Explanation:

Elements in group 16 wants to bond with elements in group IIA, the group of alkaline earth metals.

The bonding will make it easier for them complete their octet.
Elements in group 16 has 6 valence electrons.
To have a complete octet, they require 2 more electrons.
Group II elements are willing donors as they are metals.
For Group II elements to fill their octets, they must lose two electrons.
So the willingness of group II elements to lose two electrons and the readiness for group 16 elements to gain the electrons makes the desire one another.

5 0

3 years ago

Goodnight everyone hope y’all have a great sleep and a great day today

MakcuM [25]

Answer:

thank you

Explanation:

YOU TOO!!! HAVE A GREAT DAY TOMORROW

7 0

3 years ago

Read 2 more answers

Sam and Reagan are arguing about waves. Sam says that sound waves are transverse, but Reagan says they are longitudinal. Who is

Murljashka [212]

<h3><u>Answer;</u></h3>

Reagan is right

<h3><u>Explanation;</u></h3>

A longitudinal wave is a wave in which particles are displaced parallel to the direction the wave travels.
Longitudinal waves are characterized by regions called compressions, where the particles are closest together and rarefaction is where the particles are furthest apart.
<em><u>A sound wave traveling through air is a classic example of a longitudinal wave. Sound wave are also mechanical waves that require material medium for propagation.</u></em>
<em><u>Sound wave sin are are longitudinal waves because air molecules move in a direction that is parallel to the direction that the wave moves</u></em>

7 0

3 years ago