Answers
Answer:
Count each type of atom in reactants and products. ...
Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances. ...
Repeat steps 1 and 2 until the equation is balanced
Explanation:
Step 1: Coefficients Versus Subscripts. When approaching a chemical equation, it is important that you understand the difference between coefficients and subscripts. ...
Step 2: Sum the Atoms. ...
Step 3: Balance the First Element. ...
Step 4: Repeat for the Other Elements. ...
Step 5: Tips.
Answer:
2C6H6 + 15O2 = 12CO2 + 6H2O
Explanation:
This is a combustion reaction meaning a substance (in this case Benzene or C6H6) reacts with oxygen gas (O2) and releases energy in the form of light and heat.
so Benzene (C6H6) and Dioxygen (O2) are reactants meaning they are on the left side of the equation
Carbon Dioxide (CO2) and Water (H2O) are the products meaning they are on the right side of the equation
To balance an equation you need an equal amount of each element/compound/polyatomic on each side of the equation
so 2C6H6 + 15O2 = 12CO2 + 6H2O:
(2•6) = 12 C = (12•C) = 12 C ~ 12C = 12C
(2•6) = 12 H = (2•6) = 12 H ~ 12H = 12H
(15•2) = 30 O2 = [(12•2) • (6•1)] = 30 O2
~ 30 O2 = 30 O2
so the equation is now balanced
feel free to ask if you have any other questions
hope this helps :)
Related Questions
what is the concentration of OH− in a solution with a pOH value of 6.09
Answers
Answer:
I'm not sure
Explanation:
I'm just not sure
Question 4 of 25
How do scientists write very large numbers?
O A. They round off all numbers to a few digits after the decimal.
O B. They express the numbers using scientific notation.
O C. They divide all numbers by a constant to reduce the size.
O D. They simplify the numbers by deleting the exponents.
Answers
Answer:
B.
Explanation:
sodium oxide can react with water to produce sodium hydroxide. in the reaction, how many moles of sodium hydroxide will be produced.
Answers
Answer: 2 mol of NaOH
Explanation:
The balanced chemical equation for the reaction is:
Na2O + H2O --> 2NaOH
Looking at this, we can see that 1 mol of Na2O will react with 1 mol of H2O to produce 2 mol of NaOH
3. Classify each reaction as exothermic or endothermic. (4 marks)
a. Energy + SO2(g) S(g) + O2(g) _________________________________
b. Draw a potential energy diagram for the reaction above:
Answers
Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction owing to te fact that energy is a reactant in the equation.
What is an endothermic reaction?An endothermic reaction is one in wioch energy is supplied to the system in order to enable the breakdown of bonds. Hence, the reaction vessel feels cool as energy is withdrawn from the surroundings.
The reaction; Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction since energy is a reactant in the equation.
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Calculate the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL.
Answers
Considering the definition of dilution, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.
What is diluionFirst of all, you have to know that when it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.
Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeMolarity of the solution in this caseIn this case, you know:
Ci= 4 M Vi= 7 mLCf= ?Vf= 30 mLReplacing in the definition of dilution:
4 M× 7 mL= Cf× 30 mL
Solving:
(4 M× 7 mL)÷ 30 mL= Cf
Cf= 0.93 mL
In summary, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.
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How to find moles of a cooking recipe? Chemistry project help please
Answers
The moles of substances required to make scrambled eggs is given in the cooking recipe for scrambled eggs.
What is the moles of a substance?A mole of. a substance is the amount of that substance which contains the avogadro number (6.02 × 10^23) of particles in it.
A mole of a substance is usually given as a standard unit measurement of that substance.
The mass of 1 mole of is known as the molar mass if that substance.
From the recipe for preparing scramble eggs given, the moles of substances required are as follows:
6 moles of eggs1 mole of red bell pepper1 mole of green bell pepper1/2 moles of carrots1/4 moles of olive oil 1/4 cup of saltTherefore, the moles of substances required to make scrambled eggs is given in the cooking recipe for scrambled eggs.
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Write balanced chemical equations for:
a) coke + oxygen --> carbon dioxide
b) carbon dioxide + coke --> carbon monoxide
Answers
Answer:
a. C (s)+ 02(g)---->C02(g)
b. CO2(g) +C(s)--->2CO(g)
Explanation:
This reaction is the method of purification of some precious metals such a iron(Fe) in it's ore. a.The carbon(coke) is oxidized to carbon (IV) oxide
b. the carbon dioxide gas is reduced with the same carbon to produce carbon(II) oxide.
What is the name of an isotope with 23 protons and 25 neutrons?
Select one:
Cadmium
Vanadium
Chromium
Manganese
Answers
Answer: Vanadium
Explanation:
What does Earth rotate on? (2 points)
a
Its axis
b
Its continents
c
Its countries
d
Its poles
help asap i'll give u 100 points and brainliest
Answers
Answer:
its axis
Explanation:
the earth rotates on its axis 24 hrs a day in relation to the sun.
7. Reproduce the following sentences as indicated in brackets. a. Urmila always goes to temple, .................... ? (Supply the correct question tag) b. The baby was playing with a doll. (Change into interrogative) c. Peter will start a business next year. (Change into "when" question) d. They .............. (not finish)......... the work yet. (Put the verb in the bracket in the correct tense) e. She said to me, "My brother knows you." (Change into indirect speech) f. Ram married Sita. (Change into passive voice)
Answers
Answer:
a. Urmila always goes to the temple, doesn't she?
b. Was the baby playing with the doll?
c. When will Peter start a business?
d. They have not finished the work yet.
e. She told me that her brother knows me.
f. Sita was married by Ram.
Explanation:
A. In grammar, a question tag is a very short clause at the end of a statement which changes the statement into a question. For example, in 'She said half price, didn't she?' , the words 'didn't she' are a question tag.
B. Interrogative questions/sentences often have to get a yes/no answer.
C. The "next year" will be the answer to that question. U need to ask when.
D. The have not done the work yet, therefore the answer would change from "not finish" to "have not finished"
E. Indirect speech is speech which tells you what someone said. It's like the game "telephone" indirect speech is what you tell someone else, what another person said, or what someone else tells you what another person said.
F. Passive voice means that a subject is a recipient of a verb's action.
Which of the following is an example of an insoluble substance being added to water?
When added to water, the substance quickly falls to the bottom and then dissolves.
The substance has disappeared after being poured into the water.
The substance makes the water cloudy and then forms a layer on top of the water.
The water remains clear after the substance is stirred into the water with a spoon.
Answers
Answer:
Explanation: “Insoluble” generally means that a substance does not dissolve in water. Some examples include: sand, fats, wood, metals, and plastic. When we put them in water and try to mix them, they will not dissolve.
Explanation:
what do all fossils fuels have in common
Answers
[tex] \mathrm\pink{Almost \: all \: fossils \: are \: in \: sedimentary \: rocks.} [/tex]
Which of the compounds below will dissociate in water? Check all that apply.
Ba(NO3)2
CaSO4
CO2
H2CO3
Mg3(PO4)2
Answers
The compounds that can dissociate in water from the options given below are;
Ba(NO3)2
CaSO4
Mg3(PO4)2
What is dissociation of compounds?Dissociation of compound is the process by which compounds degraded into smaller unit which can also recombine to form larger one in another condition.
When ionic compounds dissociate in water, the water molecules separate the ionic crystal. This is because of the attraction between the positive and negative ions in the crystal.
Therefore, The following compounds dissociate in water.
Ba(NO3)2
CaSO4
Mg3(PO4)2
Learn more about dissociation of compounds here.
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According to the kinetic molecular theory, the molecules of an ideal gas is
Answers
Answer:
exert no attractive forces on each other, or on the walls of the container
Explanation:
How many joules are required to eat 5.25 g of titanium from 85.5 celsius to 132.5 celsius
Answers
The amount of energy required to eat 5.25 g of Titanium from 85.5 celsius to 132.5 celsius is 129 joules.
How do we calculate required heat?Absorbed or released amount of heat will be calculated by using the below formula as:
Q = mcΔT, where
m = mass of titanium = 5.25g
c = specific heat of titanium = 0.523 J/gram degree celsius
ΔT = change in temperature = 132.5 - 85.5 = 47 degree celsius
On putting these values on the above equation we get,
Q = (5.25)(0.523)(47) = 129 joules
Hence required heat is 129 joules.
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Which of the following describes carbohydrates?
Answers
Answer:
They are converted into glucose, they are a source of energy for the body
Explanation:
that's the answer
A mutation can be defined as a change in an organism's
transcription.
phenotype.
genotype.
proteins.
Answers
Answer:
Genotype
Explanation:
A mutation is the change is DNA, aka the genotype
Why are water and hydrogen peroxide different substances even though they are both made up of hydrogen and oxygen atoms?
Answers
In the Lewis symbol for a fluorine atom, there are __________ paired and __________ unpaired electrons.
Answers
In the Lewis symbol for a fluorine atom, there are 4 paired and 1 unpaired electrons.
However, paired electrons simply means are 2 electrons occupying the same orbital in an atom or molecule of a substance
On the other end, unpaired electron is a single electron that occupies an orbital of an atom.
What is an atom?An atom is the smallest part of an element which can take part in a chemical reaction.
Some atoms of elements are:
MonoatomicDiatomicTriatomicPolyatomicIn conclusion, in the Lewis symbol for a fluorine atom, there are 4 paired and 1 unpaired electrons.
Learn more about paired and unpaired electrons:
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Answer: 6, 1
Explanation:
Explain the difference between current electricity and magnetism.
Answers
Answer:
Electricity can be present in a static charge, while magnetism's presence is only felt when there are moving charges as a result of electricity. In simple words, electricity can exist without magnetism, but magnetism cannot exist without electricity.
HOPE THIS HELPS, HAVE A GREAT DAY!!~
Explanation:
Contrast (Compare) the Sun's gravitational pull on Earth when Earth is
closest to the Sun and when Earth is farthest from the sun.
Answers
Answer:
gravity equation.
Explanation:
use this gravity equation
F= G(m1*m2/d²)
what is ozen. gas? How is it formed?
Answers
[tex]\sf\huge\underline\purple{Ozone\: Gas:-}[/tex]
Ozone, O3, an unstable, blue, diamagnetic gas with a characteristic pungent odor, protects the earth and its inhabitants from intense ultraviolet radiation from the sun.[tex]\rightarrow[/tex]Ozone is an allotropic molecular form of oxygen containing three atoms of oxygen (O3). Ozone O3 is generated through the passage of oxygen O2 through a high voltage potential resulting in the attachment and formation of a third oxygen atom.
[tex]\rightarrow[/tex]The molecular formula for ozone (O3) was established by Soret (1863) by taking the ratio of the change in volumes when O3/O2 mixtures were either heated or exposed to turpentine and cinnamon oil.
Formation:-[tex]\rightarrow[/tex]Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
__________________________________
Hope it helps you:)
What are the evidences that support the big bang theory?.
Answers
Answer:
Almost all the galaxies were at the time moving away from us . All the elements that we see around us . Cosmic microwave background radiation . The formation of galaxies and the large scale structure of the cosmos .
Explanation:
Pots A and B both have plain soil, bean seeds, and the same amount of light. Pot B receives more water (see table). After 50 days the plants are measured. Based on the data, which of the following conclusions can NOT be drawn from the data table?
A plant that receives more water will have more mass
The amount of water a plant receives affects its growth
The taller a plant is, the more mass it has
A plant that receives more water will grow t
Answers
A. water per day: 20 m/ height: 24cm/ mass: 3.1g B. Water per day: 60 ml/ height: 24cm/ mass: 9.6g
I think that the answer to this question is the third option. These two plants are of the same height but plant B has more mass. So therefore the statement is not true.
If this is a multiple-choice, then I would also select the fourth option along with the third. Plant B received more water, but it is the same height as plant A.
I hope my answer is satisfactory, and that I was of help to you.
-Toremi
6. Zn + 2HCl → ZnCl2 + H2 How many moles of HCl are produced from the reaction of 2.25 moles of zinc?
Answers
Answer:
E. 16.6 mol HCl
Explanation:
The equation for the reaction is;
Zn + 2 HCl --> ZnCl2 + H2
From the reaction 2 moles of HCl produces 1 mole of ZnCl2
Therefore; 8.3 moles of ZnCl2 will be produced by;
= 8.3 moles ×2
= 16.6 Moles of HCl
Therefore; E. 16.6 mol HCl
Spring tides happen 2 times each month at the _and_phases
Neap tides happen 2 times each month at the _and_phases
Answers
Answer:
Spring tides happen 2 times each month at the New and Full phases
Neap tides happen 2 times each month at the First Quarter and Third Quarter phases
What are the steps of natural selection?
Answers
Answer:
The five steps involved in the process of natural selection are
Variation • Inheritance • Selection • Time • Adaptation
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Brainly Community Contributor
Which state of matter of water is the most dense ?
A. Gaseous water vapor
B. Liquid water
C. Solid ice
D. Water and ice are equally dense.
Answers
How did Mesosaurus fossils get separated?
First, state your claim about how the Mesosaurus fossils got separated. Then, use evidence to support your claim. For each piece of evidence you use, explain how the evidence supports your claim. I need 2 reasoning and two pieces of evidence. help l will give you 15 points if they answer this now!
Answers
Answer: try thinking with your eyes close
Explanation:
giving brainliest please help!