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3 years ago

Which of the following is a combustion reaction?

Chemistry

2 answers:

Zielflug [23.3K]3 years ago

8 0

Answer:

B. C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Explanation:

A combustion reaction can be defined as a class of chemical reactions, that named as "burning", that occurs usually when a <em>hydrocarbon reacts with oxygen to produce carbon dioxide (CO₂) and water (H₂O).</em>

So, the correct answer is the choice B, 1.0 mole of propane "hydrocarbon" burned with 5.0 moles of oxygen to produce 3.0 moles of CO₂ and 4.0 moles of H₂O.

snow_lady [41]3 years ago

5 0

That would be B.

Its the combustion of propane in oxygen.

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Write the electron configuration

ycow [4]

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

8 0

3 years ago

Can someone help pls! I’m very confused on this!!

Klio2033 [76]

1. 160,000
2. 160,00
You just have to multiply the volume and the buffer.

6 0

3 years ago

Fred mixes a solution using two types of solutions: 0.60 liters containing 10% alcohol and 0.40 liters containing 35% alcohol. W

insens350 [35]

The alcohol concentration of the mixed solution is 20%

Simplification :

Based on the given condition, formulate :

35% ×0.40 + 0.6 ×10% ÷{ 0.4+0.6}

Calculate the product : $\frac{0.14+0.06}{0.4 + 0.6}$

Calculate the sum or difference : $\frac{0.2}{1}$

Any fraction with denominator 1 is equal to numerator : 0.2

Multiply a number to both numerator, denominator : 0.2 × $\frac{100}{100}$

Calculate the product or quotient : $\frac{20}{100}$

A fraction with denominator equals to 100 to a percentage 20%.

How do you find the concentration of a mixed solution?

In general when your are mixing two different concentrations together first calculate number of moles for each solution (n=CV ,V-in liter) then add them together it will be total moles,then concentration of mixture will be = total moles / total volume(liter).

Learn more about concentration of alcohol :

brainly.com/question/13220698

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5 0

2 years ago

How much energy would be produced from the reaction of 2.40 moles hydrogen with 3.95 moles chlorine? ___ H2 + ___ Cl2 ___ HCl ΔH

True [87]

Answer:

How much energy would be produced from the reaction of 2.40 moles hydrogen with 3.95 moles chlorine?

$H_2 + Cl_2 -> 2HCl , deltaH = -554 kJ$

Explanation:

Given,

2.40 moles hydrogen reacts with 3.95 moles chlorine.

From the balanced chemical equation,

1mol. of H2 reacts with 1mol. of Cl2

then,

2.40mol. of H2 reacts with ----?mol of Cl2

$=>2.40 mol. H2 * \frac{1mol. Cl2}{1mol. H2} \\=2.40 mol. Cl2$

So, the remaining moles of Cl2 is in excess.

The limiting reagent is--- H2.

1mol. of H2 releases --- 554kJ of energy

then,

2.40mol of H2 releases ---- ?

$=>2.40mol * \frac{554kJ}{1 mol.} \\=1329.6kJ$

Answer is: deltaH =-1329.6kJ

3 0

3 years ago

Which three properties differentiate solids, liquids, gases, and plasmas?

zaharov [31]

There are 3 states of matter – solid, liquid, gas. These states of matter occur naturally.

The fourth state of matter is called plasma. Plasma does not exist naturally and needs to be produced artificially from gases.

Gases are heated to a high temperature. The atoms and molecules, at this temperature, move at a great speed and collide with each other. In this process, the electrons are released from the atoms. Plasma contains negatively charged electrons and positively charged ions. Plasma can be referred to as hot ionized gas.

Plasma is similar to gas. It is a medium in which electrons travel. These electrons have a positive charge on them.

Shape

Solids have a definite shape.

Example: wood.

Liquid has the shape of the vessel which holds the liquid.

Example: water.

Gases lack shape. Gases need to be stored in a sealed vessel hence, takes the shape of the vessel.

Example: oxygen stored in an oxygen cylinder.

Plasma is similar to gas and hence, is stored in a sealed vessel. Thus, plasma takes the shape of the vessel in which it is stored.

Volume

Solids have a definite volume.

Liquids also have a definite volume.

Gases lack volume. Gas takes the volume of the vessel in which it is stored.

Example: oxygen has the volume of the cylinder in which it is stored.

Plasma also does not have a volume. Like gases, plasma also takes the volume of the vessel in which it is stored.

Conduction of heat

Solids are conductors of heat.

The molecules of a solid are conductors of heat hence, solid gets hot.

Example: wood gets heated up after some time when kept in sunlight.

Liquids conduct heat.

The molecules of a liquid are conductors of heat hence, it starts boiling.

Gases do conduct heat.

Plasma also conducts heat.

Plasma has thermal conductivity.

7 0

3 years ago