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3 years ago

HELP!! what are the usual products of combustion reactions?

Chemistry

2 answers:

kotykmax [81]3 years ago

8 0

Answer:

The usual products of combustion reactions are carbon dioxide and water.

Explanation:

Combustion reaction is when a substance reacts with oxygen gas, resulting in a release of energy in the form of light and heat. Combustion reactions must have oxygen (O2) as one of the reactants.

Alekssandra [29.7K]3 years ago

5 0

Explanation:

Carbon dioxide and water

I hope it helps

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How many pairs of homologous chromosomes are found in human body cells

suter [353]

There are 22 pairs of <span>homologous chromosomes are found in human body cells.</span>

3 0

3 years ago

Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be

vlabodo [156]

Answer:

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

Explanation:

Mass of bottle = 10.221 g

Mass of bottle with aluminium pieces = 11.353 g

Mass of aluminium = 11.353 g - 10.221 g = 1.132 g

Mass of alum and bottle = 19.230 g

Mass of alum = 19.230 g - 10.221 g = 9.009 g

Experimental yield of alum = 9.009 g

Theoretical yield of alum:

$2Al(s) +2 KOH(aq) +4H_2SO_4(aq)+10 H_2O(l) \rightarrow 2 KAl(SO_4)_2.12 H_2O(s)+3H_2(g)$

Moles of aluminium = $\frac{1.132 g}{27 g/mol}=0.041926 mol$

According to reaction, 2 moles of aluminum gives 2 moles of alum.

Then 0.041926 mol aluminium will give :

$\frac{2}{2}\times 0.041926 mol=0.041926 mol$ of alum.

Mass of 0.041926 moles of alum:

0.041926 mol × 474 g/mol= 19.873 g

Theoretical yield of alum = 19.873 g

Percentage yield:

$\% Yield =\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Percentage yield of the alum:

$\% Yield =\frac{ 9.009 g}{19.873 g}\times 100=45.33\%$

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

7 0

3 years ago

Explain why elements with less protons require fewer neutrons to be stable compared to elements with more protons.

Solnce55 [7]

Answer:

The reason for this is because of the repulsive force between protons: The stronger the repulsion force, the more neutrons are needed to stabilize the nuclei.

Explanation:

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3 years ago

You want to determine the molar

natima [27]

Answer:

I just guessed it out to be 3

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1 year ago

Mechanical energy is found by____ kinetic energy and potential energy.

ad-work [718]

Answer:

Sum (Addition) of its

Explanation:

Mechanical energy = kinetic energy + potential energy.

The mechanical energy or power which an entity possesses is the accumulation of its kinetic energy and its potential energy.
These are two types of mechanical energy-kinetic, and potential.
Mechanical energy total is equivalent to the sum of both these two energy amount.

3 0

3 years ago