The reactant necessary for a combustion reaction is oxygen.
(option D).
Combustion is a chemical reaction that occurs when a substance reacts with oxygen, producing heat and light. In order for combustion to take place, three elements are needed: fuel, heat, and oxygen.
Fuel is the substance that undergoes combustion, such as gasoline, wood, or methane. Heat is the energy required to initiate and sustain the reaction. Lastly, oxygen is the reactant that combines with the fuel, allowing it to burn and release energy.
When a combustion reaction occurs, the fuel and oxygen combine to form carbon dioxide (option C) and water (option A). This process is exothermic, meaning it releases energy in the form of heat and light.
For example, when wood is burned in the presence of oxygen, it undergoes combustion. The heat from a match or a spark provides the necessary activation energy to start the reaction. Oxygen from the air combines with the carbon in the wood, producing carbon dioxide and releasing energy in the form of heat and light.
In summary, oxygen is the reactant necessary for a combustion reaction. It combines with the fuel and releases energy in the form of heat and light.
(option D).
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which substance has a mass is 13.5 grams, and its volume is 5 cm 3.
Answer:
Substance is Aluminium
Explanation:
We are given;
Mass; m = 13.5 grams
Volume; V = 5 cm³
Formula for density is;
density = m/V
Density = 13.5/5
Density = 2.7 g/cm³
From the table attached, we can see that the element with a corresponding density of 2.7 is Aluminium
why an offspring and its parent share many common traits?
Answer:
Explanation: Traits are characteristics, such as its size or height and that comes from parents or other relatives.
What is the ion found in a basic solution?
A. OH +
B. H+
C. OH-
D. H-
answer ASAP plz
Solution A: pH of 10
Solution B: pH of 7
Solution C: pH of 5
Which list has the solutions placed in order of increasing H+ concentration?
Answer:
I think it’s C,B,A
Explanation:
At STP what is the density of a gas that has a gram molecular mass of 32 grams?
Answer:1.4 g/L
Explanation:
One mole of very substance at STP contains a volume of 22.4 liters. Density can be found by dividing the mass by volume . The density of the gas with a molecular mass of 32 grams is 1.42 g/l.
What is density?Density of a substance is the measure of its mass per volume. It represents how much denser it is in a given volume. Density depends on the molecular weight, bond type, volume, temperature and pressure.
STP is defined as the condition of standard temperature and pressure. 293 K and 1 atm pressure are considered to be the standard conditions. At STP, the volume of one mole of every substances contains 22.41 liters.
It is given that the molecular weight of the gas is 32 g/mol. Thus its density in one mole can be calculate as follows:
Density = mass/ volume.
= 32 g/ 22.4 L
= 1.42 g/L.
Hence, the density of the gas at STP with molecular mass of 32 g is 1.42 g/L.
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If you want 370 mL of 2.3 M AgNO3 solution, how many grams of AgNO3 do you need?
dont use that link its bad
Mark drove 14 miles EAST and then 23 miles WEST. His displacement from where he started would be
Answer:
9 miles west
Explanation:
hope this helps
Complete the nuclear reaction.*
[tex] \boxed {_{-1}^0e} [/tex]
Explanation:
[tex]\huge _{53}^{125}I\rightarrow _{54}^{125}Xe+\boxed {_{-1}^0e} [/tex]
Need to finish TODAY ASAP! HIgh point questions
Answer:
The answer is C. The wire is there so that electrons can flow from one electrode to another, because without the wire, there would be nothing connecting them and the electrons would not be able to flow to each of the electrodes.
The estimate obtained from a sample of which size is likely to be closest to
the actual parameter value of a population?
O A. 15
B. 30
C. 85
D. 50
the closest value is C, 85.
hope it helps!!!!
85 is the estimate value that is obtained from a sample of which size is likely to be closest to the actual parameter value of a population. Therefore, the correct option is option C.
What is population?A population is the entire set of people in a group, whether that group is a country or a collection of people who share a certain trait. A population is the group of people where a statistical sample has been collected in statistics. Hence, a population is any collection of people who have something in common.
A statistically substantial chunk of a population, rather than the full population, may also be referred to as a sample. For this reason, the standard deviation, meaning standard error, of a statistical study of a sample from the full population must be disclosed. Only a population-wide analysis would have zero standard deviation. 85 is the estimate value that is obtained from a sample of which size is likely to be closest to the actual parameter value of a population.
Therefore, the correct option is option C.
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Yusef is doing an experiment to find out how the amount of sunlight affects the growth of a seedling. He has three identical pots
containing grass seeds he planted at the same time. He puts them in windows that receive different amounts of sunlight each day.
Every day. Yusef looks at the pots and records his observations. What is the independent variable in Yusef's experiment?
OA type of soil
OB type of seedling
Ос.
amount of water
OD
amount of sunlight
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Answer:
asdffafAFSAfdsdf
Explanation:
pls help it's about density
5 points
How many moles are in 3.5 L solution with a concentration of 2.5 M?
O 8.75 moles
O .71 moles
1.4 moles
what is tyndall effect
The scattering of the particles of the light in suspension and colloid is the Tyndall effect or scattering.
What are colloidal solutions?Colloidal and suspension are the types of solution that contains the mixture of the solute in the solvent. The colloidal solution includes the insoluble solute dispersed in the medium.
The light directed towards the colloidal solution gets scattered by the solute particles present in the solution and hence is used to prove true solutions apart from the colloidal and suspension.
Therefore, the Tyndall effect is the light scattering by colloidal solution.
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what is zinc chemical formula?
Answer:
Zn+2
Explanation:
I'm sorry if its wrong but have a good one!
calculate the molar mass of hydrogen phosphate
Answer:
95.9793 g/mol
Explanation:
If 10.5 g of iron, at 25°C, absorbs 128 J of heat, what will be the final temperature of metal? (The specific heat of iron is 0.449 J g-1 °C-1)
Answer:
27.5°C = Final Temperature of the metal
Explanation:
The change in temperature using the specific heat of a material could be obtained using the formula:
Q = m*S*ΔT
Where Q is heat absorbed in Joules = 128J in the problem
m is the mass of the substance = 10.5g
S is Specific Heat of the substance = 0.449J/g°C for Iron
ΔT is change in temperature = Final T - Initial T
Replacing:
128J = 10.5g*0.449J/g°C*ΔT
2.5°C = ΔT
2.5°C = Final T - 25°C
27.5°C = Final Temperature of the metal
if you traveled 100 miles in 5 hours what is your speed
Answer:
20 MPH (miles per hour)
Explanation:
You do miles / time (miles divided by time) to calculate the average speed!
Hope this helped ^^
How does the atmospheric pressure at altitudes above sea level compare with atmospheric pressure at sea level?
A. The atmospheric pressure above sea level is higher.
B. The atmospheric pressure at sea level is higher.
c. The pressures are the same.
D. Differences in pressures cannot be determined.
Answer:
Option B
The atmospheric pressure at sea level is higher.
Explanation:
Atmospheric pressure can simply be understood as the weight of the air molecules in the atmosphere. The higher we go up into the atmosphere, the thinner the air becomes. This means that the air present at higher heights is not so much, and hence, the air is lighter. This is why most fighter jets and mountain climbers need oxygen tanks to breathe properly.
Due to the fact that the air is less dense (lighter) at higher altitudes, it also means that the atmospheric pressure at higher altitudes is less.
Therefore, the atmospheric pressure at the sea level is higher than the atmospheric pressure at altitudes above sea level
Answer:
B. The atmospheric pressure at sea level is higher.
Explanation:
Whch is more acidic, a solution with a pH of 2 or 5
Answer:
A solution with a pH of 2
Explanation:
The lower a pH is in a liquid, the more acidic it is. 7 is the neutral pH for a liquid. We usually drink around that pH for water. A pH higher than 7 expresses that the liquid is a base.
Answer:
A solution with a pH of 2 is more acidic.
Explanation:
The solution with a pH of 2 is more acidic because on the pH scale as you get closer to zero, the more acidic the solution becomes.
Name the following alkene:
CH3CH2CH2CH2CH = CH2
Answer:
1-hexene. is your answer.
The name of the given alkene is Hex-1-ene
In order to name the given alkene, we will follow some of the IUPAC rules for naming alkenes. The rules are:
1. The longest chain chosen for the root name must include both carbon atoms of the double bond.
2.The root chain must be numbered from the end nearest a double bond carbon atom.
3. The smaller of the two numbers designating the carbon atoms of the double bond is used as the double bond locator.
The given alkene is
CH3CH2CH2CH2CH = CH2
The longest chain has 6 carbon atoms, which means it is a Hexene.
If numbered from the end nearest the double bond carbon atom, the double bond will be on carbon - 1
∴ Hex-1-ene
Hence, the name of the given alkene is Hex-1-ene
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Which term is used to describe the maximum amount of a product that can be produced by a given amount of reactant? (5 points) a Catalytic reactant b Excess reactant c Limiting reactant d Theoretical yield
Answer:
d Theoretical yield
Explanation:
I took the test :)
Theoretical yield term is used to describe the maximum amount of a product that can be produced by a given amount of reactant
What is Theoretical yield?The theoretical yield is just the maximum mass of a product that a chemical reaction can produce.
Theoretical yield the amount of product produced by a perfect (theoretical) chemical reaction, not the amount that will receive from a laboratory reaction. The balanced chemical equation can be used to calculate theoretical yield, the limiting reactant's mass and relative formula mass, as well as the product's relative formula mass.
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The VSEPR model is used mainly to do what
2A1 (s) + 3C12 (g) --> 2AlCl3 (s) (balanced)
When 72 grams of aluminum react, the actual yield is 125.5 grams, what is the percent yield?
i got a few mins left
Answer:
32.3%
Explanation:
Percent yield is defined as:
Actual yield (125.5g) / Theoretical Yield * 100
To find theoretical yield we have to find the moles of aluminium. As 2 moles of Al produce 2 moles of AlCl3, the moles of Al = Moles AlCl3.
With these moles we can find the mass assuming a 100% of yield (Theoretical Yield) as follows:
Moles Al = Moles AlCl3 (Molar mass Al = 26.98g/mol)
72g Al * (1mol / 26.98g) = 2.67 moles AlCl3
Mass AlCl3 (Molar mass: 133.34g/mol)
2.67 moles AlCl3 * (133.34g / mol) = 355.8g AlCl3
Percent Yield = 125.5g / 355.8g * 100 =
32.3%Is Zinc sulfide ionic or covalent?
Hey guys, about to submit my draft for business and chemistry.
What are some things I can do to spice it up and make it better (little adjustments) that can have a big impact when the teacher is reading it?
Answer:
so u can put on hot sauce to spice it up
and give it to ur teacher
It's fruitfull to add some more information and some acquired knowledge...
Hope it is helpful !
4
If a gas takes up 250 ml at 800. torrand 50.°C, how much space will it take up at 400 torr and 25°?
A 125 ml
B 500 ml
0.46 L
D 0.542 L
Answer: The space occupied by the gas at 400 torr and [tex]25^{o}C[/tex] is 250 mL.
Explanation:
Given: [tex]V_{1}[/tex] = 250 mL, [tex]P_{1}[/tex] = 800 torr, [tex]T_{1} = 50^{o}C[/tex]
[tex]V_{2} = ?[/tex], [tex]P_{2}[/tex] = 400 torr, [tex]T_{2} = 25^{o}C[/tex]
Formula used is as follows.
[tex]\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}[/tex]
Substitute the values into above formula as follows.
[tex]\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\frac{800 torr \times 250 mL}{50^{o}C} = \frac{400 torr \times V_{2}}{25^{o}C}\\V_{2} = 250 mL[/tex]
Thus, we can conclude that space occupied by the gas at 400 torr and [tex]25^{o}C[/tex] is 250 mL.
Which of the following is NOT a unit of energy?
a)joules
b)celsius
c)calories
d)kilocalorie
Answer:
Degree Celsius
How does genetic variation make a community more stable? Include explanations of how genetic variation is related to the struggle to survive, differential reproductive success, heredity, natural selection, and evolution
Answer:
If you have genetic variation then a community is more likely to survive because the population is more likely to have individuals who are fine if there are environmental changes. Then natural selection will happen and the species will evolve to he adapted to the new environment. If everyone in a population has the same genetics, than one thing could take them all out.
Select the correct structure that
corresponds to the name.
1,5,5-trichloro-2-pentyne
A. CICH2CH2C=CCH(CI)2
B. CICH2C=CCH2CH(CI)2
C. both
Answer:
Its (b)
Explanation:
After studying abroad in boston, I have discovered everything that there is to know about chemistry, and I have come to the conclusion that B is the correct answer.
[tex]CICH_2C=CCH_2CH(CI)_2[/tex] the correct structure that corresponds 1,5,5-trichloro-2-pentyne. Hence, option B is correct.
What is pentyne?The parent name of the alkyne comes from the IUPAC name for the alkane of the same number of carbon atoms, except the ‐ ane ending is changed to ‐ yne to signify the presence of a triple bond.
[tex]CICH_2C=CCH_2CH(CI)_2[/tex] the correct structure that corresponds 1,5,5-trichloro-2-pentyne.
Hence, option B is correct.
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