Question:
In a laboratory demonstration, a balloon filled with methane and oxygen was exposed to a
flame. The result was a brief, large flame. The students were asked to formulate an equation for
the reaction. One answer is below.
CH, + 0 = CO,
This equation is incorrect.
A. Explain how and why it is incorrect
B. What would the correct equation be, and how do you know that?
Answers
Answer:
The laboratory demonstration consists of the following;
The compounds present in the combustion reaction = Methane, CH₄ and Oxygen, O₂
The chemical equation for the combustion reaction is given as follows;
CH₄ + 2O₂ → CO₂ + 2H₂O
Therefore;
A. The equation given as CH₄ + O → CO₂ is not correct because;
1) Oxygen gas exist as diatomic molecules, O₂, and given that the experiment involves the mixture of gases, the oxygen gas present which can exist as a separate compound, should be represented as O₂
2) The number of oxygen molecules in the reaction is two rather than one
3) The product also includes two molecules of water (vapor) H₂O
B. The correct equation for the reaction should be given as follows;
CH₄ + 2O₂ → CO₂ + 2H₂O
B i) The constituents of the equation is obtained by the knowledge of the fact that the combustion reaction of an organic substance such as methane in the presence of oxygen yields, carbon dioxide and water (vapor)
The equation showing the relative amounts the reacting compounds is by balancing the basic equation of the combustion of methane in the presence of oxygen
Explanation:
Related Questions
How many grams are in 7.5 moles of C6H12?
Group of answer choices
0.09g
630g
11.2
84g
Answers
Answer:
630gC₆H₁₂
Explanation:
How many grams are in 7.5 moles of C₆H₁₂?
C₆:12.011×6=72.066
H₁₂:1.008×12=12.096
72.066+12.096=84.162
84.162g/mol C₆H₁₂
7.5 molC₆H₁₂ ×84.162g/molC₆H₁₂= 631.215gC₆H₁₂
If you have 2.0 moles of sodium chloride (NaCl), what is its mass in grams?
Answers
Answer:
117g
Explanation:
Given parameters:
Number of moles = 2moles
Unknown:
Mass of NaCl = ?
Solution:
To solve the problem, we need to use the expression below;
Mass of NaCl = number of moles x molar mass
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
So;
Insert the parameters and solve;
Mass of NaCl = 2 x 58.5 = 117g
How many molecules are equal to 3.25 moles of carbon dioxide?
Answers
Answer:
1.957 × 10²⁴ moleculesExplanation:
The number of carbon dioxide molecules can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 3.25 × 6.02 × 10²³
We have the final answer as
1.957 × 10²⁴ moleculesHope this helps you
The chemical equation describing the burning of hydrogen gas is: 2H2 + O2 ---> 2H2O.
Why is this both a synthesis and a combustion reaction?
Answers
Answer:
"A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The combustion of hydrogen gas produces water vapor." and "A synthesis reaction occurs when two or more reactants combine to form a single product. ... In a double replacement reaction, two compounds exchange elements. A combustion reaction occurs when a substance reacts quickly with oxygen. Combustion is commonly called burning"
Explanation:
I tried
Which of the following samples of water will contain the most heat?
А-1 KL of water at 20°C
B- 1 kL of water at 70°C
C- 1 mL of water at 50°C
D- 1 mL of water at 80°C
Answers
Answer:
The answer is D- make sure you give good rate
Someone please help will mark as brainliest
Answers
1. solute is the substance that is being dissolve,while solvent is dissolving medium
2.saturated is solution that contain maximum amount of solut that capable of being dissolve and supersaturated is solution that contain less amount or medium of solut that capable being dissolve : example vinger
3. is a number placed in front of a chemical symbol or formula. It shows how many atoms or molecules of the substance are involved in the reaction. For example, two molecules of hydrogen would be written as 2 H2, and two molecules of water would be written 2 H2O . yes it's can be change only in caseWhen you balance an equation you can only change the coefficients
Given a balanced chemical equation it is always possible to determine
A)
the physical state of the products and reactants
B)
whether a reaction will or will not take place
C)
the relative number of moles taking part in the reaction
D)
the conditions necessary for the reaction to take place
Answers
Answer:
C) the relative number of moles taking part in the reaction
Explanation:
From a balanced chemical equation, it is always possible to determine the relative number of moles taking part in a chemical reaction.
The number of moles is the amount of the reacting specie that makes up a chemical reaction.
In balanced chemical equation, the number of moles of reactants and products must be the same. From this understanding, we can determine the amount of reactants and products needed for a chemical reaction to take place.Help me please:(:(:( with my bellwork
for brainiest
Answers
Answer:
Elements are made of only one kind of atom
Compounds are made of 2 or more elements chemically bonded together
Explanation:
Its right there????
Explain why the electron configuration of 2-3-1 represents an atom in an excited state?
Answers
Answer:
See explanation
Explanation:
If we look at the electron configuration closely, we will discover that the element must have had a ground state electron configuration of 2,4.
This is because, the innermost shell usually holds two electrons while the outer shells hold eight electrons each. The four electrons must be accommodated in the second shell in the ground state configuration of the compound.
However, when the atom is excited, one electron from this shell may move to the third shell to give the excited state configuration 2-3-1 as shown in the question.
If you start with 14.0 grams of diatomic nitrogen (N2) how many grams of diatomic hydrogen (H2) will react with it?
Answers
Answer:
I just need points
Explanation:
whegehhwjwjwhehebebejeuhebehejejbebe
how to find the electron in an atom/element
Answers
Answer:
to find the number of electrons an element has locate it on the periodic table of elements find the atomic number and note the number of protons because they are naturally electrically neutral
Answer:
M-A=N
Explanation:
M-A=N
Here is an example.
The equation above means that the atomic number (A) subtracted from the average atomic mass (M) equals the combined amount of neutrons and protons. Since we know that 35 17Cl is Chlorine (this is because Chlorine (Cl) is the 17th number on the periodic table and has the average atomic mass of 35), we can insert our data into the equation and end up with the following:
35-17=18.
From here, we can tell that we have a mix of neutrons and protons, with the total being 18. Since the atomic number is 17, we can reasonably assume that there are 17 protons and 1 neutron.
But we still need to find the number of electrons. Fortunately, the number of electrons is always equivilant to the number of protons and the atomic mass, so we know that the number of electrons is 17.
So, we have;
17 Protons
1 Neutron
17 Electrons
why is a rise in sea level significant?
Answers
Answer:
I honestly dont know but its cool problably from water fill or from the waves going to much
Explanation:
Are the atoms really "sharing" electrons
Answers
A nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?
A. 1
B. 3
C. 4
D. 6
Answers
Answer:
3 electrons
Explanation:
Which of the following is an intensive property?
Mass
Magnetism
Shape
Volume
Answers
Answer:
I believe its A. Mass
Explanation:
An intensive property is a property of matter that depends only on the type of matter in a sample and not on the amount. For example, the electrical conductivity of a pure substance is a property that depends only on the type of substance. Silver, gold, and copper are excellent conductors of electricity, while glass and plastic are poor conductors.. Other intensive properties include color, temperature, density, and solubility.
Answer:
B. Magnetism
Explanation:
Hope this helps! :))
Sorry for late answer
You have discovered an element that is a poor conductor of electricity, has a low melting point, and is a gas at room temperature. How would you classify this element?
A.metal
B.metalloid
C.actinoid
D.nonmetal
Answers
Susan is investigating physical changes. To do this, she places some ice into a large bowl and seals it with a lid. She leaves the bowl on the counter for several hours until all of the ice has melted. Using a balance, Susan determines that the mass of both the water and the ice are equal. Why is the mass of the ice and the water the same? (SC.8.P.9.1)
Answers
Answer:
No mass loss
Explanation:
The mass of ice and the water in the different state are equal because the same of quantity of matter is present in both state of matter of matter.
In essence, the mass of the physical change process is conserved. When mass is conserved, matter is neither created nor destroyed but can be changed from one form to the other. This is in compliance with the law of conservation of matter. So, no mass was lost in the physical change process and the mass will remain the same.DRAW A PEDIGREE
Read the following information and ON NOTEBOOK PAPER, construct a pedigree using the symbols we went over Tuesday: Scott is married to Christa. They have 3 children, Blake (a son), Peyton (a daughter), and Ashton (a daughter). Blake is married to Allie and they have 2 children, Henry (a son) and Harper (a daughter).
When you have completed your pedigree drawing, take a picture and attach it to this assignment and submit.
Answers
Answer:
Here you go
Explanation:
a flask of 0.30 L was weighted after it had been evacuated.It was then filled with a gas of unknown molecular mass at 760 mm of Hg and temperature of 300 K. The increase in mass of flask was found to be 0.997 g. Determine the molecular mass
Answers
The molecular mass : 81.72 g/mol
Further explanationIn general, the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm , N/m²
V = volume, liter
n = number of moles
R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)
T = temperature, Kelvin
P = 760 mmHg=1 atm
T = 300 K
V = 0.3 L
Number of moles :
[tex]\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1\times 0.3}{0.082\times 300}\\\\n=0.0122[/tex]
The molecular mass (MW) :
[tex]\tt MW=\dfrac{mass}{n}\\\\MW=\dfrac{0.997~g}{0.0122}\\\\MW=81.72~g/mol[/tex]
help with this question
Answers
A -> T OR T -> A
And
C -> G OR G -> C
As well as the direction of the strand:
5’ -> 3’ to 3’ -> 5’
For the first set:
DNA: 5’ - ATTATCGCGTAGCTAGCAGT - 3’
Comp: 3’ - TAATAGCGCATCGATCGTCA - 5’
As you can see the strands are the opposite from one another.
Try out the second set of strands and if you’re still having struggles let me know in the comments (:
HELPPPPPPPPPPPPPPPPPPP
Answers
Answer:
not sure about the first one, but i know SDS provides information about the last 3.
Explanation:
explain how to separate sugar from supersaturated sugar solution
guys pls help
Answers
A “supersaturated” solution contains more dissolved material. supersaturated solutions lies in the temperature of the water. more sugar will dissolve in hot water than in cold. Meaning that by separating the 2, only the supersaturated sugar would dissolve leaving the regular sugar untouched.
What is a mixture of sugar and water?
a solution
molecule
a compound
a precipitate
Answers
Explanation:
I think its a solution just me tell me in comments if right
Answer:
A solution
Explanation:
Sugar is soluble in water and would dissolve into the water to form a solution.
How much oxygen (O) is in 5.41 × 106 atoms of oxygen
Answers
Answer:
They show you how to do it sweetie
Explanation:
123456789 Common math
A sound wave moves from a solid material into a liquid. What would happen to the frequency of the sound?
Answers
What does the salinity of sea water represent?
the concentration of salt dissolved in the ocean
A.the concentration of all
B. dissolved chemicals in the ocean
C. the volume of salt in the ocean
D.the mass of salt in the ocean
PLEASE GIVE ME THE RIGHT ANSWER!
Answers
Answer:
the answer is b
Explanation:
5. Which of the following elements will have a charge of 4+ or 4- as an ion?
Answers
Answer:
The answer would either be Carbon or Silicon.
Explanation:
How to we measure energy?
Answers
Answer:
The official measurement unit for energy is the Joule (J). Among the most common units measuring energy mention should be made of the kilowatt/hour (kWh), used especially for electric energy (in fact it is used to calculate electricity bills).
the force that holds paticles together in the atomic nuecleaus?
Answers
Explanation:
i believe you meant particles*
How can magnetic force be exerted on objects?
1)Over a distance and anytime an object is in a magnet's field of influence.
2)Only through objects.
3)Only by touching an object.