A combustion reaction is a reaction that reacts with oxygen to produce the product. 3.5 moles of methane release - 3115 kJ/mol of heat.
What is a combustion reaction?A combustion reaction is a chemical reaction that involves the burning of the reactant in the presence of the oxygen molecule to release heat.
The balanced reaction of methane combustion is given as:
CH₄(g) + 2O₂ (g) → CO₂(g) + 2H₂O (l), ΔH = -890 kJ/mol
From the reaction, it can be said that 1 mole of methane combusts to produce -890kJ/mol enthalpy.
So, 3.5 moles will produce, 3.5 × -890kJ/mol = - 3115 kJ/mol.
Therefore, 3.5 moles of methane produce - 3115 kJ/mol heat.
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Name these compounds according to IUPAC.
The name of the compound CH₃CHOOH is acetic acid.
What is IUPAC naming rules?The International Union of Pure and Applied Chemistry (IUPAC) names organic compounds according to chemistry rules.
To locate the longest carbon chain, there are various requirements to follow, such as finding the functional group.
Thus, the name of the compound CH₃CHOOH is acetic acid.
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true or false. you would see a partial solar eclipse if you were within the moons penumbra.
How many grams of C8H18
is in 405,576.398 mL
[tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex] is the of [tex]C_8H_1_8[/tex] is in 405,576.398 mL.
What is molarity?Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
Given data:
Molar mass of [tex]C_8H_1_8[/tex] = 0.762 mol
Volume of solution = 405,576.398 mL = 405,576.398 mL/1000 = 405.576398 L
Solution:
Step 1: Calculating moles of [tex]C_8H_1_8[/tex]
• Molarity =[tex]\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}[/tex]
• Putting the value in the given formula
• Moles of solute C8H18 = [tex]\frac{\;Mass}{\;Molar \;molar \;mass}[/tex]
• Moles of solute C8H18 = [tex]\frac{\;Mass}{0.762 mol}[/tex]
Now,
Molarity =[tex]\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}[/tex]
Molarity =[tex]\frac{\frac{\;Mass}{0.762 mol}}{\;Volume \;of \;solution \;in \;litre}[/tex]
Molarity =[tex]\frac{\frac{\;Mass}{0.762 mol}}{405.576398 L}[/tex]
[tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex]
Hence, [tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex] is the of [tex]C_8H_1_8[/tex] is in 405,576.398 mL.
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I NEED HELP ASAP !!!!!!!!!!!!!!!!!!!!!1
Answer:
true im pretttyyy sure
Explanation:
bcuz the stronger the intermolecular forces the higher the boiling point :3
A sample of lead with a mass of 54.3 g is heated to a temperature of 384.4 K and placed in a container of water at 291.2 K. The final temperature of the lead and water is 297.6 K. Assuming no heat loss, what mass of water was in the container?
The mass of the water in the container given the data from the question is 22.5 g
Data obtained from the questionMass of cold lead (M) = 54.3 gTemperature of lead (T) = 384.4 KTemperature of water (Tᵥᵥ) = 291.2 KEquilibrium temperature (Tₑ) = 297.6 KSpecific heat capacity of the water (Cᵥᵥ) = 4.184 J/gKSpecific heat capacity of lead (C) = 0.128 J/gKMass of water (Mᵥᵥ) = ?How to determine the mass of waterHeat loss = Heat gain
MC(T – Tₑ) = MᵥᵥCᵥᵥ(Tₑ – Tᵥᵥ)
54.3 × 0.128 (384.4 – 297.6) = Mᵥᵥ × 4.184(297.6 – 291.2)
6.9504 × 86.8 = Mᵥᵥ × 4.184 × 6.4
Divide both side by 4.184 × 6.4
Mᵥᵥ = (6.9504 × 86.8) / (4.184 × 6.4)
Mᵥᵥ = 22.5 g
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seriously what do i put in the x and y table im stuck and need to move to the next assignment
Remember the relationship
P is indirectly proportional to VSo
The pairs are
(2,4)(1,8)(4,2)(12,2/3)(2/3,12)And so on
what is an unsaturated solution
Unsaturated solution: a solution in which more solute can be dissolved.
Explanation:
Salt dissolved in water or even sugar dissolved in water is an unsaturated solution if the quantity of dissolved salt/sugar is below the saturation point.
unsaturated solution: a solution in which more solute can be dissolved.
Explanation:
A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the container.
Devices that use a liquid spray to remove pollutants from the air are called __________. A) alloys B) particulates C) scrubbers D) minerals E) chlorofluorocarbons (CFCs)
Devices that use a liquid spray to remove pollutants from the air are called scrubbers. The correct option is C.
What is a wet scrubber?Wet scrubber is a pollution removing technique from the air. It is a sprayer which trap the harmful gas molecules from the air.
It is used in factories and industrial exhaust steams.
Thus, the correct option is C. scrubbers.
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Sodium-24 has a half-life of 15 hours. How much sodium-24 will remain in a 36.0-g sample after 45 hours
Answer:
4.5 gm left
Explanation:
45 /15 = 3 half lives (1/2 )^3 =1/8 th
1/8 * 36 = 4.5 gm
What happens to water when it is heated from 0 °C to 4 °C? (5 points)
It freezes.
It expands.
Its density increases.
Its composition changes.
Answer: The volume decreases
Explanation:
Because 4C is a cold temperature and atoms inside the water start to move slowly and begins to cange into a solid formation.
The density of the water increases and it is maximum at 4 degrees Celsius.
What is Freezing Point ?The temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure .
freezing point of water is 0° Celsius or 32° Fahrenheit.
Though liquids expand on heating water does not expand between 0°C to 4°C instead it contracts as water has maximum density at 4°C.
Thus the option C is the right answer , The density of the water increases as water is heated from 0 degree Celsius to 4 degree Celsius
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which of the following chemical symbol is that of an element with six electrons in the outermost shell a)Ca b)Cl c)Ne d)S
Answer:
S
Explanation:
Using periodic table (see those little numbers in the upper right? Those are electron 'shells' .... look at the bottom one)
Ca has 2 Cl has 7 Ne has 8 S has 6 in the outermost shell
in need of some help with this question please~
when 4g of oxygen gas reacts with excess of hydrogen gas, the volume of water vapour produced at (STP) is ....... L ( H = 1 , O = 16).
a) 22.4
b) 44.8
c) 11.2
d) 5.6
an explanation would be great for future reference <3 thank you in advance!
Answer:
5.60 Liters at STP
Explanation:
First you need the balanced reaction equation
2 H2 + O2 ====> 2 H2O
4 g of oxygen ( O2 ) is 4/(15.999*2) moles of O2 (using periodic table)
Twice the number of moles of H2O re produced (from equation)
at STP the volume of a mole of gas is 22.4 liter/ mole
put all of this together
2 * 4 / (15.999*2) moles * 22.4 L/mole = 5.60 L
A lunar eclipse occurs when the Moon casts a shadow on the Earth.
Answer:
No....see below
Explanation:
Well not quite.... that would be a solar eclipse....when the Earth shadows the moon from the Sun is a lunar eclipse
Given a balance chemical equation, 2 H2(g) O2(g) 2 H2O(g) If a reaction mixture contains 3 moles of O2(g) with 4 moles of H2(g), which reactant is the limiting reactant and what is the mass remaining of the reactant in excess
We have the equation [tex]2\text{H}_{2}+\text{O}_{2} \longrightarrow 2\text{H}_{2}\text{O}[/tex].
This means that for every mole of oxygen consumed, 2 moles of hydrogen are consumed.
Considering the oxygen, the reaction can occur 3 times.Considering the hydrogen, the reaction can occur 4/2=2 times.Therefore, hydrogen is the limiting reactant.
If all 4 moles of the hydrogen are consumed, then 2 moles of the oxygen will be consumed. This means 1 mole of oxygen, which has a mass of 15.9994 grams, will remain.
What’s the importance of having a vascular system
Answer:
The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body. The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter.
Explanation:
A balloon containing 0.15mol of hydrogen gas (H2) has a volume of 0.75L. If the balloon is further inflated with additional hydrogen gas to a 3.75L volume, what is the total mass of hydrogen gas in grams in the balloon
The total mass of hydrogen gas in grams in the balloon given the data is 1.5 g
How to determine the new mole of hydrogenInitial mole (n₁) = 0.15 moleInitial volume (V₁) = 0.75 LNew volume (V₂) = 3.75 LNew mole (n₂) = ?The new mole of the gas can be obtained by using the ideal gas equation as follow:
PV = nRT
V / n = RT / P
RT / P = constant
V₁ / n₁ = V₂ / n₂
0.75 / 0.15 = 3.75 / n₂
5 = 3.75 / n₂
Cross multiply
5 × n₂ = 3.75
Divide both sides by 5
n₂ = 3.75 / 5
n₂ = 0.75 mole
How to determine the mass of hydrogenNumber of mole = 0.75 moleMolar mass of H₂ = 2 g/moleMass of H₂ = ?Mass = mole × molar mass
Mass of H₂ = 0.75 × 2
Mass of H₂ = 1.5 g
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What property of copper makes it ideal to create thin sheets of
copper?
Copper is a soft, ductile, and malleable metal that bends and stretches easily without breaking. Copper is a versatile metal for construction and manufacturing because of this.
What is the molarity of a solution of h3po4 if 10.2 ml is neutralized by 53.5 ml of 0.20m koh what is the molarity of a solution of h3po4 if 10.2 ml is neutralized by 53.5 ml of 0.20m koh 0.67m h3po4 0.15m h3po4 0.35m h3po4 0.37m h3po4
The molarity of the solution of H₃PO₄ needed to neutralize the KOH solution is 0.35 M
Balanced equationH₃PO₄ + 3KOH —> K₃PO₄ + 3H₂O
From the balanced equation above,
The mole ratio of the acid, H₃PO₄ (nA) = 1The mole ratio of the base, KOH (nB) = 3How to determine the molarity of H₃PO₄ Volume of acid, H₃PO₄ (Va) = 10.2 mLMolarity of base, Ca(OH)₂ (Mb) = 0.2 MVolume of base, Ca(OH)₂ (Vb) = 53.5 mL Molarity of acid, H₃PO₄ (Ma) =?MaVa / MbVb = nA / nB
(Ma × 10.2) / (0.2 × 53.5) = 1 / 3
(Ma × 10.2) / 10.7 = 1 / 3
Cross multiply
Ma × 10.2 × 3 = 10.7
Ma × 30.6 = 10.7
Divide both side by 30.6
Ma = 10.7 / 30.6
Ma = 0.35 M
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Which statement describes what happens when somebody slaps their hand on a wall?
Answer:
B. Wall applies equal reaction force on hand
Explanation:
This is newton's third law. You push something, that something pushes you back with same force. The direction is opposite, so if I push a wall, the wall pushes me back with same force just in opposite direction (so wall towards me). This is why option A is incorrect b/c it says force in same direction as wall. C and D talk about unequal force which is incorrect.
Answer:Wall applies equal reaction force on hand
Explanation:
2AlCl3 → 2Al + 3Cl2
In the reaction above, if we were to get 7.50g of AI, what would be the yield of the experiment.
Answer:
Explanation:
2AlCl3 → 2Al + 3Cl2
In the reaction above, if we were to get 7.50g of AI, what would be the yield of the experiment.
HELP PLEASE ASAP WILL MARK BRAINLIEST
what is the amount of heat required to raise the temperature of 200.0g of aluminum by 10C (specific heat of aluminum: 0.21 cal/g C)
a. 420 cal
b. 4200 cal
c. 42,000 cal
d. 420,000 cal
Please show calculations!
Now
[tex]\\ \rm\Rrightarrow Q=mc\delta T[/tex]
[tex]\\ \rm\Rrightarrow Q=200(10)(0.21)[/tex]
[tex]\\ \rm\Rrightarrow Q=20(21)[/tex]
[tex]\\ \rm\Rrightarrow Q=420cal[/tex]
Answer:
AAAAA its A
Explanation:
why is vanilla extract brown when vanilla ice cream is white?
please be as detailed as possible in your answer
Answer:
Because vanilla Ice cream contains vastly more milk, sugar, etc. Then vanilla extract. It only takes a very small amount in comparison to adding that flavor.
Explanation:
I hope this helps girl
Why is vanilla ice cream white instead of brown?
It is true that Vanilla beans are brown in color and it is interesting that with this brown color ingredient, Vanilla Ice Cream is still white. Well, the vast majority of vanilla flavoring comes in the form of extract. Vanilla beans are very expensive and pure Vanilla has great flavor. When Ice Cream is made, the Vanilla we put in the Ice Cream is very insignificant quantity when compared to the milk powder, sugar, and cream that goes into the Ice Cream. Due to the whipping and procedure of the making, the brown color of Vanilla is lost amongst the huge quantities of other ingredients and we get milky white yummy Vanilla Ice cream
22. A mixture of gases contains 1.0 atm of neon, 2.0 atm
of Argon, and 6.0 atm of xenon. What is the total pressure
in the container?
The total pressure of the mixture of the nobles gases in the container is determined as 9 atm.
What is total pressure of the gases?
The total pressure of the gasses is equal to the total pressure of the container.
Pt = P1 + P2 + P3
Pt = 1 atm (neon) + 2 atm (Argon) + 6 atm( xenon)
Pt = 9 atm
Thus, the total pressure of the mixture of the nobles gases in the container is determined as 9 atm.
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WILL GIVE BRAINLIEST
If an element is in period 6, what is the highest possible number of electrons that can be in that atom?
What is the IUPAC name for this product?
The IUPAC name for the given product is 2 chloro Butane.
What is IUPAC nomenclature?IUPAC stands for 'International Union of Pure and Applied Chemistry', which givers some rule for designing the name of compounds of chemistry.
In the given product total four carbon atoms are present and between all of them single bonds are present. In the second carbon atom, chlorine group is present. During the nomenclature process, first we write down the name of the attached group which is followed by the alkane chain.Hence name of the product is 2 chloro Butane.
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Identify the combustion reaction
Answer:
C₄H₁₂ + 7O₂ --> 4CO₂ + 6H₂O
Explanation:
Organic molecules react with O2 to create water and CO2 in combustion processes. C4H12 is an organic molecule that combines with O2 to create water and CO2 as shown in the reactions.
As a result, this is the sole reaction that obeys the general combustion equation.
1. What is a taste bud?
O tissues containing nerve cells for taste
another name for the tip of the tongue
O
a liquid in the mouth that breaks down food
O a molecule that allows you to taste food
O tissues containing nerve cells for taste
What is the largest possible electronegativity difference for a bond to be covalent?
A.
0.5
B.
1.7
C.
0.0
D.
1.0
Covalent bonding is the sharing of electrons between atoms. The electronegativity difference of 1.7 is the largest for a bond to be covalent. Thus, option B is accurate.
What is the electronegativity difference?The electronegativity difference is the parameter used to determine the polarity and the type of the bond formed by the atom of the species. it gives the measure of the atom to attract the shared electrons.
For a covalent bond to form the electronegativity difference between the two atoms of the molecules must be less than 2. A difference of more than 2 results in ionic bond formation.
Therefore, option B. 1.7 is the highest electronegativity difference for a covalent bond formation.
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Identify the acid, base, conjugate acid, and conjugate base in the following reaction:
HSO4- + NH3 = SO4-2 + NH4+
Answer:
Acid: HSO4-
Base: NH3
Conjugate Acid: NH4+
Conjugate Base: SO4-2
Explanation:
HSO4- gives a H+ to NH3 making NH4+ the conjugate acid.
Same can be said to the base.
WILL MARK BRAINLIST!
A chemist needs 32.0 g of phenol, C6H5OH, for an experiment. How many moles of phenol is this?
Explain how to find the molar mass of the compound.
Explain how many significant figures your answer needs to have.
The numerical answer
A chemist needs 32.0 g of phenol, for an experiment. The number of moles of phenol is 0.340 mol.
What are moles?
The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
Calculating the moles
[tex]\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\\\rm Number\;of \;moles= \dfrac{32.0}{94.11} = 0.340 moles[/tex]
The molar mass can be calculated by counting the molecules of the elements. Then multiply the molecules of each element with its molar mass and then add the total number, you'll get the molar mass of the compound.
Thus, the number of moles of phenol is 0.340 mol.
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