88.9 grams of 45.0% Ba(NO3)2 solution contains 40.0 grams of Ba(NO3)2?
What is barium nitrate ?
The toxic and colorless inorganic substance with chemical formula
Ba(NO3)2 is barium nitrate. The exposure of this compound to flame gives a green-colored flame. The most common use of this compound is pyrotechnics.
Let x grams of Ba(NO₃)₂, solution contains 40 grams Ba(NO₃)₂
Then, 45% of x = 40
[tex]\frac{45}{100}[/tex] × x = 40
x = 88.9 grams
Thus we can conclude that 88.9 grams of 45.0% Ba(NO3)2 solution contains 40.0 grams of Ba(NO3)2
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An aqueous solution is 28.0% by mass potassium bromide, KBr, and has a density of 1.24 g/mL.
The molality of potassium bromide in the solution is
Molarity depends on the temperature and molality is independent of temperature. The molality of the given potassium bromide solution is 3.19mol/kg.
What is molality?Molality can be defined as the “total moles of a solute in a kilogram of a solvent.” SI unit of molality is mol/kg.
Mathematically,
Molality= number of moles of potassium bromide ÷mass of solvent in kg
number of moles of potassium bromide = given mass ÷molar mass of potassium bromide
28% means in 100 gram of solution 28g of potassium bromide is present, so mass of solvent= 100-28=72g
number of moles of potassium bromide=28g÷119 g/mol
= 0.23mol
Molality=(0.23×1000)÷72
Molality=3.19mol/kg
Therefore, the molality of solution is 3.19mol/kg.
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Use the heat equation to calculate the energy, in joules, required to heat 10.0 g of silver (Ag) from
112 °C to 275 °C. (SH of silver=0.235 J/g C
Answer:
383 joules
Explanation:
Energy = mass * delta T * c
c=0.235
delta t = 275 - 112 = 163
mass = 10
10 * 163 * 0.235 = 383.05 joules = 383 joules.
I didn't include units because i'm too lazy to and the units cancel out to joules anyways but you should probably include units in your answer
balance the equation for redox reaction in basic solution: HS^- (AQ.) + CLO3^- (AQ.) = S8 (S) +CL^- (AQ.)
The balancing of the given reaction can be: [tex]8HS^-_{(aq)}+4ClO^{3-}_{(aq)}---- > S_8+4Cl^-+4H_2O[/tex]
What is balancing equation?A balanced chemical equation is one that has the same number of atoms of each type in the reaction on both the reactant and product sides. In a balanced chemical equation, both the mass and the change are equal.
When using constants, a balanced equation is critical because the coefficients become the powers of the concentrations of products and reactants. The constant is incorrect if the equation is not balanced.
To balance a chemical equation, add coefficients to the symbols or formulas as needed so that the same number of each type of atom occurs in both reactants and products.
To balance the given reaction, it can be written as:
[tex]8HS^-_{(aq)}+4ClO^{3-}_{(aq)}---- > S_8+4Cl^-+4H_2O[/tex]
Thus, the above mentioned is the balanced equation.
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Can someone kindly help me!
Gibbs energy of a reaction can be calculated from the Helmholtz equation as follows: ΔG = ΔH - TΔS. The ΔG for the given reaction is 333214.2 J.
What is Gibbs free energy?Gibbs energy G is the energy stored in a system which is balanced from the energy for work done. The equation to find Gibbs energy change is as follows: ΔG = ΔH - TΔS.
The enthalpy change or ΔH is the difference of total enthalpy of products from the total enthalpy of reactants. In calculation, the standard enthalpy of each species in the reaction must be multiplied with their coefficients.
From the given standard values, ΔH is calculated as follows:
ΔH = ΔH (products) - ΔH (reactants).
= [(2× -733.8) + (3 × -393.5)] - [(-824.5) + (13 × -110.5)]
= - 2035.8 KJ/mol
The entropy change ΔS can be calculated in a similar way from the given values as follows:
ΔS = [(2× 445.2) + (3 × 213.6)] - [(87.4) + (13 × 197.6)]
= -1125 J/(mol K)
The temperature is 298 K thus ΔG can be calculated as follows:
ΔG = ΔH - TΔS
= - 2035.8 KJ/mol -(-1125 J/(mol K) × 298 K)
= 333214.2 J
Therefore, the Gibbs energy change ΔG for the given reaction is 333214.2 J.
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A stack of newspapers is burned completely to ash in a laboratory. How does the resulting mass relate to the initial mass of the stack of newspapers?
Responses
The mass of the gases and the ash should be one-fourth the mass of the initial stack of newspapers.
The mass of the gases and the ash should be one-fourth the mass of the initial stack of newspapers.
The mass of the gases and the ash should be double the mass of the initial stack of newspapers.
The mass of the gases and the ash should be double the mass of the initial stack of newspapers.
The mass of the gases and the ash should equal the mass of the initial stack of newspapers.
The mass of the gases and the ash should equal the mass of the initial stack of newspapers.
The mass of the gases and the ash should be one-half the mass of the initial stack of newspapers.
If 88.0 g of CO2 is produced from the complete decomposition of calcium carbonate in 250 g of impure sample, what is the purity in terms of the carbonate content?
Now purity is the effective percentage of pure reactant in the total mass.
The rest is inert impurities.
They ask you to calculate the purity of the carbonate, so you have to focus on CaCO3
Let's calculate with the reaction:
CaCO3 (s) -----------------> CaO (s) + CO2 (g)
x 88.0 g
100 g CaCO3 ------- 44 g CO2
x ------- 88 g CO2
x = 200.16 g
Sample has 250 g of impurities. So:
Purity % = (200.16 g / 250 g impure) x 100 = 80.0 % of purity
:What is the name of the organic compound whose structural formula is shown here?A) EthaneB) EtheneC)PropeneD) Propane
We see that we have two carbon atoms. The nomenclature for two carbon atoms is Eth.
We also have a single bond between the two carbon atoms accompanied by hydrogens, so it is an alkane, so the name will be ethane.
The answer will be A) Ethane
In a soccer game, the player with a momentum of 100 kg m/s kicks a ball that is motionless on the ground. After the kick, the player has a momentum of 94 kg m/s, and the ball has a momentum of 6 kg m/s. Was momentum conserved?
Since the momentum after collision is equal to the momentum before collision, the momentum was conserved.
What is the conservation of linear momentum?Let us recall that the principle of the conservation of linear momentum states that the momentum before collision is equal to the momentum after collision.
This implies that the total momentum of the system is constant. The momentum of the object does not change.
The total momentum before collision = 100 kg m/s + 0 kg m/s = 100 kg m/s
Total momentum after collision = 94 kg m/s + 6 kg m/s = 100 kg m/s
Hence the momentum of the system is conserved.
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A 60.5 mL sample of a 0.116 M potassium sulfate solution is mixed with 40.0 mL of a 0.102 M lead (II) acetate solution and the following precipitation reaction occurs: K2SO4(aq)+Pb(C2H3O2)2(aq)→2KC2H3O2(aq)+PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 1.00 g . Determine the limiting reactant, the theoretical yield, and the percent yield.
The limiting reactant is lead acetate as in absence of it reaction will not occur. Theoretical and percent yield are 2.1092 g and 49.52% respectively.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .
To calculate percent yield, it is necessary to know theoretical yield which for the given reaction is found out as, mass of potassium sulfate is found from molarity which is 1.212 g .If,174.259 g potassium sulfate produces 303.26 lead sulfate then 1.212 g potassium sulfate will produce 1.212×303.26/174.259=2.1092 g of lead sulfate which is the theoretical yield.
The percent yield is calculated as follows, 1/2.1092×100=49.52%.
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The Federal Reserve Bank of the United States is also known as the
people’s bank.
central bank.
world bank.
retail bank.
Answer:
The Federal Reserve System (sometimes refered to as "The Fed") is the central bank of the United States. It is the name given to a country's primary monetary authority.
Explanation:
Answer:
central bank
Explanation:
2023
What is the name of a substance that contains a useful element which can be extracted from it?
The name of a substance that contains a useful element which can be extracted from it is ore.
ore can be defined as the mineral from which useful substance can be extracted and it contains more valuable substances. ore is deposited of one or more precious mineral in earth crust. examples of ore is iron ore : hematite , magnetite , copper ore : pyrite , borntite, zinc ore : sphalerite, zinc blende, calamite.
The Four types of ore are given as follows :
Ore oxideOre halidesOre carbonatessulphide oreThus, The name of a substance that contains a useful element which can be extracted from it is ore.
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what is the molarity of h3po4 solution if 0.05 M ba(oh)2 is needed to neutralize 20.00 ml of h3po4
The molarity of h3po4 solution if 0.05 M ba(oh)2 is needed to neutralize 20.00 ml of h3po4 is 0.25 M.
Given,
M₁ =?
valance factor H₃PO₄ (n)₁ = 3
M₂ = 0.05 M
V1 = V2 = 20 m or 0.02 L
valance factor Ba(OH)₂(n)₂ = 2
M₁n₁V₁ = M₂n₂V₂
M₁ = (M₂n₂V₂) / n₁V₁
= 0.05 × 2 × 3
= 0.25 M
Molarity is the number of moles of a substance in keeping with the liter of answer. solutions labeled with the molar awareness are denoted with a capital M; a 1. zero M answer incorporates 1 mole of solute according to the liter of answer. Molality is the variety of moles of solute in step with a kilogram of solvent.
Molarity (M) is the amount of a substance in a positive volume of solution. Molarity is described because the moles of a solute in step with liters of an answer. Molarity is also known as the molar attention of an answer.
Molarity is very crucial in chemistry for one big purpose. it's far the measurement of concentration in any mixture. The molarity of any solution is a way to know the unique factors or compounds which are found in any solution.
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Write a balanced nuclear equation for the beta decay of Pb-212
Answer:
Explanations:
Beta decay is a type of radioactive decay in which a beta particle is emitted from the nucleus. A beta particle is written as:
[tex]^0_{-1}\beta[/tex]The required balanced nuclear equation for the beta decay of Pb-212 will be expressed as:
[tex]^{212}_{82}Pb\rightarrow^0_{-1}\beta+^{212}_{83}Bi[/tex]From the reaction, you can see that the beta decay of Pb-212 produces the Bismuth element with atomic number 83 and mass number 212.
how to find number of moles of hydrogen gas collected for trial one?
We can consider the hydrogen gas of the first trial like an ideal gas and use the ideal gas law.
P * V = n * R * T
Where P is the pressure of the gas, V is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature. We already have those values.
P = 753.8 mmHg (Pressure of Dry Hydrogen Gas)
760 mmHg = 1 atm
P = 753.8 mmHg * 1 atm/(760 mmHg)
P = 0.9918 atm
V = 40.3 mL (Volume of Hydrogen Gas Collected)
1000 mL = 1 L
V = 40.3 mL * 1 L/(1000 mL)
V = 0.0403 L
R = 0.082 atm*L/(mol*K) (ideal gas constant)
T = 295.6 K (Temperature in K)
Finally we can replace these values into the formula and solve it for n.
P * V = n * R * T
n = P * V /(R * T)
n = (0.9918 atm * 0.0403 L)/(0.082 atm*L/(mol*K) * 295.6 K)
n = 0.00165 moles
Answer: the number of moles of Hydrogen gas collected in trial 1 is 0.00165 mol.
If we use R = 62.358 L-torr/mol-K we need:
T = 295.6 K
V = 0.0403 L
P = 753.8 mmHg = 753.8 torr
n = P * V /(R * T)
n = (753.8 torr * 0.0403 L)/(62.358 torr*L/(mol*K) * 295.6 K)
n = 0.00165 moles
Fill in the blanks
Interphase
Mitosis is now over
__________ is unwound.
Here the cell _________________its chromosomes in preparation for another round of cell division.
One complete ____________ is from one cell division to the next.
chromatin , grows , cell cycle .
What stage of the cell cycle do chromosomes copy in order to prepare for division?interphase
The cell then replicates its chromosomes during a crucial interphase stage known as the S phase and makes sure that its systems are prepared for cell division. The cell is now prepared to enter the first stage of mitosis, assuming all circumstances are ideal.
Mitosis is now over chromatin is unwound.
Here the cell grows its chromosomes in preparation for another round of cell division.
One complete cell cycle is from one cell division to the next.
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What is formed when a sodium atom and chlorine atom react chemically?
1- an element
2- a compound
3- an electron
4- a neutron
Which equation is balanced?
Responses
2Mg+O2→2MgO
Na+F2→2NaF
2Al+3O2→Al2O3
Al+3F2→AlF3
A solution of an unknown compound has a concentration of 36.2% by mass. How many moles are present in 3.644 kg of solution if the solute has a molar mass pf 89.6 g/mol?
First part)
36.2% by mass means:
36.2 g of solute ------- 100 g of solution
Second part)
We want to know how many moles are present in 3.644 kg of solutions.
3.644 kg = 3644 g of solution
Now,
36.2 g of solute -------- 100 g of solution
x --------- 3644 g of solution
x = 1319 g of solute = 1320 g (3 significant figures)
Therefore 1320 g are diluted in 3644 g
Third part)
Number of moles = mass /molar mass
Number of moles = 1320 g of solute/ 89.6 g/mol of solute= 14.7 moles
Answer: 14.7 moles of solute
Write one paragraph explaining if the plant will make enough oxygen for a human tosurvive on Mars. Explain how you figured it out.
To know if the plant will make enough oxygen for a human to survive on Mars, we need to calculate how much oxygen it produces using the photosynthesis equation ratio:
1 mole of Glucose --- 6 mol of oxygen
0.09 moles of Glucose --- x mol of oxygen
x = 0.54 moles of oxygen.
According to the data, a human needs 25 moles of oxygen per day to live and the plant produces just 0.54 moles of oxygen. One plant is not enough for a human to survive on Mars. We would need:
0.54 moles of oxygen ---- 1 plant
25 moles of oxygen ---- x plants
0.54x = 25
x = 46.3 plants
We would need 46.3 plants to produce enough oxygen for a human.
Enter your answer in the provided box.
Calculate the following quantity: volume of 1.96 M calcium chloride that must be diluted with water to
prepare 761 mL of a 2.79 x 102 M chloride ion solution.
mL
The volume of a 1.96 M calcium chloride that must be diluted with water to prepare 761 mL of a 2.79 x 102 M chloride ion solution is 108,326.02mL.
How to calculate volume?The volume of a solution can be calculated using the following formula:
C₁V₁ = C₂V₂
Where;
C₁ = initial concentrationV₁ = initial volumeC₂ = final concentrationV₂ = final volumeAccording to this question, 1.96 M calcium chloride must be diluted with water to prepare 761 mL of a 2.79 x 10² M chloride ion solution. The initial volume can be calculated as follows:
1.96 × V = 279 × 761
1.96V = 212,319
V = 108,326.02mL
Therefore, 108,326.02mL is the volume of the solution.
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By using carbon-14, scientists were able to determine that 436 half-lifes have occurred since this specimen died. How old is this fossil? The half-life of carbon-14 is 5730 years. **TWO PART QUESTION** Please explain all your steps for part b!!
In this question, we have to calculate the age of a fossil after the decay of Carbon-14 436 times, with a half-life of 5730 years, and in order to do that, we can multiply both values, one example to understand this step better is:
Let's say we have a 2 times decay of a certain amount of Carbon-14, we can say that 11,460 years have passed by, and we can check it:
x grams of C 14 = 0 years
x/2 grams of C 14 = 5730 years, 1st decay
x/4 grams of C 14 = 11460 years, 2nd decay
Therefore with 436 decays
5730 * 436 = 2,498,280 years this is the age of this fossil
Part B:
For this part, we will need to use the Half-Life formula, which is the following:
N(t) = N0(1/2)^t/t1/2
Where:
N(t) = quantity of the substance remaining, 2.2*10^-78
N0 = initial quantity of the substance
t = time elapsed, 2,498,280 years
t1/2 = half life of the substance, 5730 years
Now we add these values into the formula:
2.2*10^-78 = N0(1/2)2,498,280/5730
2.2*10^-78 = N0(1/2)^436
2.2*10^-78 = 5.63*10^-132N0
N0 = 2.2*10^-78/5.63*10^-132
N0 = 3.91*10^53 was the initial quantity
Given the following equation:2 C4H10 + 13 O2 = 8 CO2 + 10 H2O ; what is the mole to mole ratio of C4H10 to O2? Mole to mole ratio of O2 to CO2?
2mol C4H10 : 13mol O2
13mol O2 : 8mol CO2
Explanations;Given the combustion of butane reaction expressed as:
[tex]2C_4H_{10}+13O_2\rightarrow8CO_2+10H_2O[/tex]In order to get the mole ratio, we will use the coefficient of the compound in the equation.
For the mole to mole ratio of C4H10 to O2
Coefficient of C4H10 in the equation is 2 while the coefficient of O2 in the equation is 13. Hence the mole ratio of C4H10 to O2 is 2mol C4H10 : 13mol O2
For the mole to mole ratio of O2 to CO2
Coefficient of CO2 in the equation is 8 while the coefficient of O2 in the equation is 13. Hence the mole ratio of O2 to CO2 is 13mol O2 : 8mol CO2
I’m struggling with determining the results of some of these problems.
Chemistry => Measurements => Dimensional Analysis
In order to do a division, the units must be congruent.
We can divide units of different properties, that is, units of mass by units of volume, but we cannot divide or multiply units of the same property that are on different scales, that is, we cannot divide nor multiply milligrams by grams, there must be a conversion before division. Therefore we will have to:
[tex](3.0mg^2)\cdot(0.023g)\text{ = No}[/tex][tex](4.0g)\cdot(1.0cm^3)=Yes=4.0g.cm^3[/tex][tex]\frac{20.mg^2}{0.010g}=No[/tex]a student pipettes 5 ml of vinegar into a erleyenmayeer flask adds indictator and 25 ml of distilled water and titrates it with 0.1098M naoh. calcualte the concentraion of acetic acid in the vinegar if the intitial volume reading on the burrette was 1.35 ml and the final reading is 37.83ml
The concentration of the solution is obtained as 0.134 M.
What is the concentration of the acetic acid?We know that titration is a method of analysis that depends on the volume of the solutions in order to determine the concertation.
We know that;
Total volume of the vinegar = 5 ml + 25 mL = 30 mL
Concentration of the sodium hydroxide = 0.1098M
Volume of the sodium hydroxide used = 37.83ml - 1.35 ml = 36.48 mL
Using the formula;
CAVA/CVB = NA/VB
CAVANB = CBVBNA
CA= CBVBNA/VANB
CA = 0.1098 * 36.48 * 1/30 * 1
CA = 0.134 M
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How many grams of C4H10 are needed to form 85 grams of carbon dioxide?
Answer
The mass of C4H10 needed = 28 grams
Explanation
Given:
The mass of carbon dioxide formed = 85 grams
What to find:
The mass of C4H10 needed to form 85 grams of CO2.
Step-by-step solution:
Step 1: Write the balanced equation for the reaction.
[tex]2C_4H_{10}+13O_2\rightarrow8CO_2+10H_2O[/tex]Step 2: Convert 85 grams of CO2 formed into moles.
Using the atomic masses of C and O from the periodic table; the molar mass of CO2 = 44.01 g/mol.
So, the moles of CO2 in 85 grams CO2 can be calculated using the mole formula
[tex]\begin{gathered} Moles=\frac{Mass}{Molar\text{ }mass} \\ \\ Moles\text{ }of\text{ }CO_2=\frac{85\text{ }g}{44.01\text{ }g\text{/}mol}=1.931379232\text{ }mol \end{gathered}[/tex]Step 3: Determine the moles of C4H10 needed.
Using the mole ratio of C4H10 to CO2 in step 1 and the moles of CO2 formed in step 2; the moles of C4H10 needed is calculated as shown below.
[tex]\begin{gathered} 2mol\text{ }C_4H_{10}=8mol\text{ }CO_2 \\ \\ x=1.931379232mol\text{ }CO_2 \\ \\ Cross\text{ }multiply\text{ }and\text{ }divide\text{ }both\text{ }sides\text{ }by\text{ }8mol\text{ }CO_2 \\ \\ x=\frac{1.931379232mol\text{ }CO_2}{8mol\text{ }CO_2}\times2mol\text{ }C_4H_{10} \\ \\ x=0.482844808\text{ }mol \end{gathered}[/tex]Step 4: Convert the moles of C4H10 in step 3 above to grams.
From the periodic table, the molar mass of C4H10 can be determined to be = 58.12 g/mol.
Using the same mole formula used in step 2, the mass of C4H10 is
[tex]\begin{gathered} Mass=0.482844808mol\times58.12g\text{/}mol \\ \\ Mass\text{ }of\text{ }C_4H_{10}=28.06294024\text{ }grams \\ \\ Mass\text{ }of\text{ }C_4H_{10}\approx28\text{ }grams \end{gathered}[/tex]Therefore, the mass of C4H10 needed to form 85 grams of carbon dioxide is 28 grams
Which of the following are needed to calculate the percent yield? Select all that apply.Excess yieldLimiting yieldActual yieldTheoretical yield
Explanation:
Percent yield can be calculated as follows:
[tex]\text{ \%yield = }\frac{Actual\text{ yield}}{Theoretical\text{ yield}}x100[/tex]So,
Answer:
Actual yield
Theoretical yield
1. Consider the titration of 0.250 M of 50.0 mL nitric acid (HNO) by 0.350 M NH,. Kb for NH, is 1.8 x 10°. Calculate the pH of the resulting solution after the following volumes of NH, have been added. a. 0.0 mL b. 50.0 mL c. Half-way equivalence point d. At equivalence point e. 150.0 mL
Answer:I got pH = 4.98
Explanation:. This agrees with the fact that strong acid + weak base = acidic pH.
If you notice, the volume and concentration of both
NH
3
and
HNO
3
are identical, and
HNO
3
only has one
H
+
. Therefore, you should convince yourself that these neutralize each other exactly because the number of mols of each are equal.
This leaves the same number of mols of
NH
+
4
as
NH
3
, in TWICE the volume (i.e. don't forget to account for dilution!):
PLEASE ANSWER i am begging
How many milliliters of a stock solution of 7.00 M HNO3 would you have to use to prepare 0.120 L of 0.480 M HNO3 ? If you dilute 20.0 mL of the stock solution to a final volume of 0.270 L , what will be the concentration of the diluted solution?
1. The volume of the stock solution needed is 0.008 L
2. The concentration of the diluted solution is 0.52 M
1. How to determine the volume of the stock solution
We can obtain the volume of the stock solution as follow:
Molarity of stock solution (M₁) = 7Volume of diluted solution (V₂) = 0.120 L Molarity of diluted solution (M₂) = 0.480 M Volume of stock solution (V₁) =?M₁V₁ = M₂V₂
7 × V₁ = 0.480 × 0.120
5 × V₁ = 0.0576
Divide both side by 7
V₁ = 0.0576 / 7
V₁ = 0.008 L
Thus, the volume needed is 0.008 L
2. How to determine the concentration of the diluted solution
We can obtain the concentration of the diluted solution as follow:
Volume of stock solution (V₁) = 20 mLConcentration of stock solution (C₁) = 7 MVolume of diluted solution (V₂) = 0.270 L = 0.270 × 1000 = 270 mL Concentration of diluted solution (C₂) =?C₁V₁ = C₂V₂
7 × 20 = M₂ × 270
140 = M₂ × 270
Divide both side by 270
C₂ = 140 / 270
C₂ = 0.52 M
Thus, the concentration is 0.52 M
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Liquid hexane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . If 6.36 g of water is produced from the reaction of 7.76 g of hexane and 41.9 of oxygen gas, calculate the percent yield of water.
Percent yield of water when 7.76g liquid hexane and 41.9 of oxygen reacts to form 6.36g of water is 84 %
Balanced equation for the reaction is
2 C₂H₁₄ + 19 O₂ ---> 12 CO₂ + 14 H₂O
1 mole of hexane = Given weight / molecular weight = 7.76 g x 1 mole / 130 g = 0.06 moles [Molecular mass of hexane = 130]
1 mole O₂ = 41.9 g x 1 mole / 32 g = 1.3 moles
Hydrogen is the limiting reactant in the reaction
Moles of H₂O = 0.06 moles H₂ x 14 H₂O / 2 CO₂ = 0.42 moles H₂O
Mass H₂O = 0.42 moles x 18 gm/mole = 7.56 g
Percent yield = (Actual yield / Theoretical yield) * 100 = (6.36 / 7.56) * 100 = 84 %
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Which of the following cycles involve molecules from the atmosphere being broken and rearranged into new molecules in living things? (Choose all that apply!)
Choose all that apply:
Rock cycle.
Carbon Cycle
Carbon cycle.
Nitrogen cycle.
Solar cycle.
The cycles that involve molecules from the atmosphere being broken and rearranged into new molecules in living things are Carbon cycle and Nitrogen cycle.
The carbon cycle :
The carbon cycle is studied as two sub-cycles: One sub-cycle deals with rapid carbon exchange between the living organisms and the other deals with long-term carbon cycling by the various geologic processes. Carbon is present in the air as carbon dioxide. It gets dissolved in water and reacts with water molecules which produces bicarbonates. By land plants, bacteria, and algae, photosynthesis converts carbon dioxide into the organic molecules. These are made by photosynthesizers which are passed through the food chains. The cellular respiration forms carbon dioxide gas by converting the organic carbon.
When organic carbon gets stored for a longer term, it happens when matter from living organisms is deep in the ground or gets sink to the ocean bottom. It results in formation of sedimentary rock. Activities of volcano, and burning of fossil fuels brings the stored carbon in the carbon cycle.
The nitrogen cycle
The nitrogen cycle is a cycle of processes which repeats. During this cycle, nitrogen moves by the living and non-living things such as soil, water, plants, animals and bacteria. Microscopic living organisms which contains one cell. To move through the separate parts of the cycle, nitrogen change its forms. Nitrogen exists as a gas N₂ in the atmosphere, but in soil it is present as nitrogen oxide NO, and nitrogen dioxide NO₂. It is used as a fertilizer and found in other forms too like ammonia NH₃. It can be processed further in a fertilizer NH₄NO₃.
The five stages in the nitrogen cycle are nitrogen fixation, mineralisation, nitrification, immobilization, and denitrification. Microbes in the soil turns the nitrogen gas N₂ in volatile ammonia NH₃. Therefore, the fixation process is called nitrogen fixation. When a chemical like NO₃ moves away from the soil or other material and gets leaked into nearby areas, it dissolves in the water and dips out the soil which pollutes the waterways.
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