Answer:
Balance The Equation: C2H2 + O2 = CO2 + H2O
1. Label Each Compound With a Variable
aC2H2 + bO2 = cCO2 + dH2O
2. Create a System of Equations, One Per Element
C: 2a + 0b = 1c + 0d
H: 2a + 0b = 0c + 2d
O: 0a + 2b = 2c + 1d
3. Solve For All Variables (using substitution, gauss elimination, or a calculator)
a = 2
b = 5
c = 4
d = 2
4. Substitute Coefficients and Verify Result
2C2H2 + 5O2 = 4CO2 + 2H2O
L R
C: 4 4 ️
H: 4 4 ️
O: 10 10
What is the frequency of a wave with a speed of 45 m/s and a wavelength of 2.5 m?
Answer:
frequency of the wave f=4 Hz
What is technology?
the process of designing and making tools
any device that contains electronic parts
the use of knowledge to solve practical problems
the study of the natural world
90 points
Answer:
Any device that contains electronic parts
Dissolve 30 g of sodium sulphate into 300 mL of water
determine the number of moles of sodium sulphate in the solution
Answer:
number of moles = 0.21120811
Explanation:
To find the number of moles, given the mass of the solute, we use the formula:
[tex]\mathrm{n = \dfrac{ m }{ M } }[/tex]
[tex]\mathrm{n = number\:of\:moles\:(mol)}[/tex]
[tex]\mathrm{m = mass\:of\:solute\:(g)}[/tex]
[tex]\mathrm{M = molar\:mass\:of\:solute\:( \dfrac{ g }{ mol } )}[/tex]
Label the variables with the numbers in the problem:
[tex]\mathrm{n =\:?}[/tex]
[tex]\mathrm{m =30\:g }[/tex]
[tex]\mathrm{M =\:?\:Calculate\:the\:molar\:mass }[/tex]
The first thing we have to do is find the molar mass of sodium sulfate, in order for us to use the formula for finding the number of moles:
Formula for finding the molar mass of sodium sulfate:
[tex]M({ \left Na \right }_{ 2 } { \left So \right }_{ 4 }) = m \left( Na \right) +m \left( S \right) +m \left( O \right)[/tex]
For the variables and what they mean are below for finding the molar mass of sodium sulfate:
[tex]\mathrm{M =molar\:mass }[/tex]
[tex]\mathrm{m =moles=2\:moles\:for\:Na\:,1\:mole\:for\:S,\:and\:4\:moles\:for\:O}[/tex]
[tex]\mathrm{Na =sodium=22.99\:g }[/tex]
[tex]\mathrm{S =sulfur=32.06\:g }[/tex]
[tex]\mathrm{O =oxygen=16.00\:g }[/tex]
Plug the numbers into the formula, to find the molar mass of sodium sulfate:
[tex]M({ \left Na \right }_{ 2 } { \left So \right }_{ 4 }) = m \left( Na \right) +m \left( S \right) +m \left( O \right)[/tex]
[tex]\mathrm{Substitute\:the\:values\:into\:the\:formula}[/tex]
[tex]M = 2 \left( 22.99 \right) +1 \left( 32.06 \right) +4 \left( 16.00 \right)[/tex]
[tex]\mathrm{Multiply\:2\:by\:22.99\:to\:get\:45.98\:and\:1\:by\:32.06\:to\:get\:32.06}[/tex]
[tex]\mathrm{M = 45.98+32.06+4\:(16)}[/tex]
[tex]\mathrm{Multiply\:4\:by\:16\:to\:get\:64}[/tex]
[tex]\mathrm{M = 45.98+32.06+64}[/tex]
[tex]\mathrm{Add\:45.98\:and\:32.06\:to\:get\:78.04}[/tex]
[tex]\mathrm{M = 78.04+64}[/tex]
[tex]\mathrm{Add\:78.04\:and\:64\:to\:get\:142.04}[/tex]
[tex]\mathrm{M = 142.04}[/tex]
Now that we have found the molar mass, we can calculate the number of moles in the solution of sodium sulfate with the formula:
[tex]\mathrm{n = \dfrac{ m }{ M } }[/tex]
[tex]\mathrm{n =\:?}[/tex]
[tex]\mathrm{m =30\:g }[/tex]
[tex]\mathrm{M = 142.04\:g/mol}[/tex]
[tex]\mathrm{Substitute\:the\:values\:into\:the\:formula}[/tex]
[tex]\mathrm{n = \dfrac{ 30 }{ 142.04 }}[/tex]
[tex]\mathrm{Divide\:142.04\:by\:30\:to\:get\:0.21120811}[/tex]
[tex]\mathrm{n = 0.21120811}[/tex]
0.21120811 rounded gives you 0.2112
or if you did the problem without decimals
30 grams of sodium sulfate divided by its molecular weight – which we found to be 142 – gives us a value of 0.2113 moles.
mention one metal that doesn't burn or form oxide when heated in air
Answer:
Gold, Platinum, Silver, Ruthenium
Typically the role of the “masses” – the town’s people in this case – serve largely as an antagonist in a story. Either they initiate trouble or they latch on and carry it along. Analyze the characterization/role of the town’s people in the story and how they affect the outcome of the story
Answer:
i believe its the role of the antagonist
Explanation:
How many moles of Cu(OH)2 will be produced if given 1 mole
KOH.
Answer:
0.032 mole
Explanation:
Please mark me as brainliest
A constantly changing and developing resume means that you are always _______________ as a person and potential employee. A. changing and developing B. failing C. succeeding D. remaining the same
What factors mechanical weathering ?.
Earth Science.
Answer:
-Growth of plants on the rock.
-Temperature and pressure changes in nature.
-Freezing and thawing of water in cracks of the rock.
-Formation of salt crystals within the rock.
-Burrowing by animals.
those are some factors I know
hope this helped you
Answer the following questions on your answer sheets to summarize what you have learned from this module: 1. What is the measure of the sum of the interior angles of a convex polygon with n sides? 2. What is the measure of the sum of the angles of a convex quadrilateral? A pentagon? A nonagon? 3. What is the measure of an interior angle of a regular polygon with n sides? 4. What is the measure of an interior angle of a regular octagon? 5. What is the sum of the measure of the exterior angles, one at each vertex of a convex polygon? You are now going to take the post-assessment to see how much you have learned about the topics. Write the letter of the correct answer on your answer sheets.whit it's part of your website is subject your company is looking to buy the tickets to buy the graphs for your website on top and a ate the tickets for your website on each event time position requires that you enjoyed each of these emails from this list update me with u part time job and even if the tickets email from your website is for your time job your friend in real estate request email from your ee
The measure of the sum of the interior angles of a convex polygon with n sides is given by [tex]S=(n-2)180[/tex]
What is a polygon?A polygon can be defined as a two-dimensional geometric figure that consists of straight line segments and finite number of sides.
What is a quadrilateral?A quadrilateral can be defined as a type of polygon that is made up of four (4) sides, four (4) vertices, four (4) edges and four (4) angles.
Mathematically, the measure of the sum of the interior angles of a convex polygon with n sides is given by:
[tex]S=(n-2)180[/tex]
In Geometry, the measure of the sum of the angles of a convex quadrilateral, pentagon, and a nonagon is equal to 360 degrees.
For a regular polygon:
Mathematically, the measure of an interior angle with n sides is given by;
[tex]A=(2n-4)90[/tex]
For a regular octagon:
Mathematically, the measure of an interior angle is equal to 135 degrees.
Lastly, the sum of the measure of the exterior angles, one at each vertex of a convex polygon is equal to 360 degrees.
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i need help with this question
Answer:
the difference between model A and model B is the fact that model A has more atoms in it, and they are smaller and all the same type while model B has less atoms, they are bigger and there are different types of atoms.
Explanation:
mr clean
How many grams of NH3 can be produced from 12.0g of H2?
Answer:
Balanced reaction:
3 H2 (g) + N2 (g) → 2 NH3 (g)
Use stoichiometry to convert g of H2 to g of NH3. The process would be:
g H2 → mol H2 → mol NH3 → g NH3
12.0 g H2 x (1 mol H2 / 2.02 g H2) x (2 mol NH3 / 3 mol H2) x (17.03 g NH3 / 1 mol NH3) = 67.4 g NH3
Explanation: See above
Hope this helps, friend.
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[tex]\Large \text{1)}[/tex]
[tex]\textbf{Use the formula and substitute the values}[/tex]
[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]
[tex]\textbf{Solve for the number of moles}[/tex]
[tex]n = 0.003\ mol[/tex]
[tex]\textbf{Calculate final volume }[/tex]
[tex]40+10=50\ mL[/tex]
[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]
[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]
[tex]\Large \text{2)}[/tex]
[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]
[tex]\displaystyle DF=\frac{50}{10}=5[/tex]
a. How many moles of CO2 are produced in 19.63 grams of CO2?
Answer:
0.44604005953260284 moles
Explanation:
or you could round it to 0.446 moles
mol CO₂ = mass : molar mass CO₂
mol CO₂ = 19.63 : 44 g/mol = 0.446
What is the mass in grams of a sample of 1.73 x 10^22 molecules of
N^20^5?
Do not report units in your answer. Report your answer with two
places past the decimal point.
Answer:
the answer is 5
Explanation:
if you add 5% divided by 3 = 15%.
So if you add all of those plus the 30% you will be getting 45%.
Please help!
How many grams of H_{2}*O can be produced from the reaction of 100. g of C_{3}*H_{8}
Answer: 163.6g H2O
Explanation:
The balanced chemical equation for the combustion of propane is:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)
This means 1 molecule of C3H8 react with 5 molecules of O2 to produce 3 molecules of CO2 and 4 molecules of H2O.
Molar mass C3H8 = 44 g/mol
According to the stochiometric coefficients 1 mol C3H8 will form 4H2O
100g C3H8 to mol = 100 g / 44 g/mol = 2.273 mol
This will produce 2.273*4 H2O = 9.09 mol H2O
Molar mass H2O = 18 g/mol
Mass of 9.09 mol H2O = 9.09 mol * 18 g/mol = 163.6 g H2O
Therefore, 163.6g of H2O will be formed from the combustion of 100g of C3H8
Consider the following claim: Group behavior can increase the chances for an individual and a species to survive and reproduce.
Identify evidence from the lesson that supports this claim. Use specific examples to explain the cause-and-effect relationship between particular group behaviors and an individual’s survival.Then, identify an additional, reputable source that provides evidence to further support this claim. Use this additional evidence to draw a conclusion about the role of group behavior in individual and species’ survival. Provide a link to the source at the bottom of your response. ill give brainliest
Answer:
dont know but i went to the store td and i bought some food then after i ate it i had to use the bathroom n i fell on my way there and it hurt
Explanation:
(Many social behaviors of animals are adaptive, meaning that being social ultimately increases an animal's fitness — its lifetime reproductive success. One example of how social behavior is adaptive is aggregation against predators.)
If there are 1652 kJ of bond energy in methane, how much energy is there in a single Carbon - Hydrogen bond?
The energy in a single Carbon - Hydrogen (C-H) bond of methane is 413 kJ
Bond energyFrom the question, we are to determine the Carbon - Hydrogen bond energy in methane
From the given information,
The total bond energy in a molecule of methane is 1652 kJ
C-H bond energy = [tex]\frac{Total\ bond\ energy\ in\ methane}{number\ of \ C-H \ bonds}[/tex]
Number of C-H bonds in methane = 4
Therefore,
C-H bond energy = [tex]\frac{1652}{4}[/tex]
C-H bond energy = 413 kJ
Hence, the energy in a single Carbon - Hydrogen (C-H) bond of methane is 413 kJ
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A 35.3 g of element M is reacted with nitrogen to produce 43.5 g of compound M3N2. What is (i) the molar mass of the element
The molar mass of the element M is mathematically given as
M=91.927g/mol
What is the molar mass of the element M?Question Parameters:
A 35.3 g of element M is reacted with nitrogen to produce 43.5 g of compound M3N2.
Generally, the equation for the Chemical Reaction is mathematically given as
3M+N2=M3N2
Therefore
moles of N2 is given as
[tex]m=\frac{mass of N2}{molar mass}[/tex]
Where
mass of N2=43.5-35.3
mass of N2=8.2
Therefore
[tex]m=\frac{8.2}{32}[/tex]
m=0.25625mole
Since 2 moles of N2 reacts with 3mols of M
Hence, 0.25625 mole of N2 reacts with 3mole of M
x=3/2*0.256
x=0.384mol
In conclusion, the molar mass of M
[tex]M=\frac{mass of x}{moles of x}\\\\M=\frac{35.3}{0.384}[/tex]
M=91.927g/mol
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write a homologous series containing -CHO as a functional group
Answer: The members of homologous series are
HCHO,CH3CHO,C2H5CHO,C3H7CHO .
The members of the homologous series containing -CHO as a functional group is HCHO,CH₃CHO,C₂H₅CHO,C₃H₇CHO .
What is a functional group?Functional group is defined as a substituent or group of toms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.
The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.
Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.
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#SPJ2
Uneven heating of Earth creates global wind systems. How does that impact climate?
Answer:
Unequal heating of the Earth’s surface forms large global wind patterns.Large global wind systems are created by the uneven heating of the Earth’s surface. These global wind systems, in turn, drive the oceans’ surface currents.Explanation:
Hope this helps
Consider this reaction:
Li3N (s) + 3H2O (l)→NH3 (g) + 3LiOH (l)
You need to make 24 g LiOH.
How many grams of Li3N must you react with excess water?
5.8 g
11.7 g
35.0 g
70.0 g
Both bromous acid (HBrO2) and hypobromous acid (HBrO) are weak acids. In both molecules, the hydrogen atom is bound to _______. Yet, the bond is more polar in ______, which makes it a stronger acid.
The polarity of HBrO2 is greater than that of HBrO hence HBrO2 is a stronger acid than HBrO .
What is an acid?According to the Arrhenius definition, an acid is any sustenance that produces hydrogen ions as the only positive ion in solution. In both molecules we can see that hydrogen is bonded to electronegative oxygen atoms.
The bond is more polar in HBrO2 and as a result of this, the molecule, HBrO2 is a stronger acid than HBrO.
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What quantity of heat (in kJ) would be required to convert 15.1 g of ice to water at 0.00°C? (∆Hfus = 6.01 kJ/mol for water)
for the answer I got 5.04, I don't know if it is correct
if it's correct, how would the process change if celsius was not zero, or does nothing change.
The quantity of heat required to convert the ice to water is 5048.4 J.
Quantity of heat requiredThe quantity of heat required to convert the ice to water is calculated as follows;
Q = n∆Hfus
where;
n is the number of moles of the ice∆Hfus is heat of fusion = 6.01 kJ/molNumber of moles of the iceThe number of moles of the ice is calculated as follows;
n = m/M
where;
M is molar mass of water (H2O) = 18 g/mol
n = 15.1/18
n = 0.84 mole
Q = 0.84 x 6.01 x 10³
Q = 5048.4 J
Thus, the quantity of heat required to convert the ice to water is 5048.4 J.
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The purpose of this guide is to help you write a clear and concise report that summarizes the lab I just completed. This lab showed me how water carries rocks to a new location. For instance how the first model showed how a stream would act with light drizzle to downpour as I saw the outcomes were all if not completely then partially different I read the information that was given to me before I started each lab lesson and went on from there. Just say something that you think you could have done better in two to three sentences
topic: kentic energy
100 points for whole thing
Answer:
The purpose of this guide is to help you write a clear and concise report that summarizes the lab I just completed. This lab showed me how water carries rocks to a new location. For instance how the first model showed how a stream would act with light drizzle to downpour as I saw the outcomes were all if not completely then partially different
I read the information that was given to me before I started each lab lesson and went on from there.
Explanation:
:)
(b) What will be the change in pH of the buffer of 7 if 5 mL of 5 N NaOH is added
to 1000 mL of the buffer?
The average annual return from stock investments historically is:
a) 11.3%
b) 12%
C) 12.5%
d) 20%
Answer:
11.3%
Explanation:
The stock market’s average annual return through history is 11.3%, which is more than most savings accounts pay.
In terms of its chromium (VI) concentration, do you think the “Unknown” sample is suitable for drinking in accordance to the EPA health assessment limitation?
The standard for chromium VI in a sample is 0.1 milligrams per liter (mg/l) or 100 parts per billion (ppb).
What is EPA?EPA is an acronym that stands for Environmental Protection Agency. The major concern of the agency is to ensure that the level of contaminants released into the environment does not exceed the set standards.
The standard for chromium VI in a sample is 0.1 milligrams per liter (mg/l) or 100 parts per billion (ppb), Since the question is incomplete, we can't ascertain if the chromium (VI) concentration exceeds this standard.
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For the reaction 2 NO₂(g) ⇌ 2 NO(g) + O₂(g) Kp = 1.11 × 10⁻⁵ at 200 °C. A 2.50 L vessel at 200 °C is filled with NO₂(g) at an initial pressure of 4.00 atm and allowed to come to equilibrium. What will be the pressure (in atm) of NO(g) at equilibrium?
The equilibrium pressure of NO is 2.14 atm.
What is equilibrium constant?The equilibrium constant is a numerical value that shows the extent to which reactants are converted into products. We have the reaction 2NO₂(g) ⇌ 2 NO(g) + O₂(g).
We have to set up the ICE table
From PV = nRT
P = nRT/V = 4 * 0.082 * 473/2.5 = 62 atm
2NO₂(g) ⇌ 2 NO(g) + O₂(g)
I 62 0 0
C -x +2x +x
E 62 - x 2x x
Kp = pNO^2 * pO2/pNO2^2
1.11 × 10⁻⁵ = (2x)^2 (x)/(62 - x)^2
1.11 × 10⁻⁵(62 - x)^2 = 4x^3
1.11 × 10⁻⁵(3844 - 124 + x^2) = 4x^3
0.04 - 0.0014x + 1.11 × 10⁻⁵x^2 = 4x^3
4x^3 - 1.11 × 10⁻⁵x^2 + 0.0014x - 0.04 = 0
x = 0.107 atm
Since;
pNO = 2x = 2(0.107) = 2.14 atm
The equilibrium pressure of NO is 2.14 atm.
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Calculate the solubility (in g / L) of a generic salt with a formula of A2B, a Ksp of 4.30 × 10−11 and a molar mass of 274 g / mol.
With a Ksp of 4.30*10−11 and a molar mass of 274 g / mol the solubility (in g / L) of the generic salt is mathematically given as
S=0.0604g/l
What is the solubility (in g / L) of the generic salt?Generally, the Ksp is mathematically given as
Ksp=4s^3
Therefore
s=(\frac{4.30 × 10−11}{4})^{1/3}
s=2.207×10^{−4]
In conclusion, solubility is
S=2.207×10^{−4]*274
S=0.0604g/l
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How many unpaired electrons are found in a ground state atom of Os?
Answer:
two unpaired electrons
Explanation:
each of which are located in a different pi* antibounding orbital.