Answers
Taking into account the definiton of molar mass and Avogadro's number, there are 8.4322×10²¹ molecules N₂O₄ molecules in a 1.25 g sample of dinitrogen tetroxide.
First of all, you should know that the molar mass of dinitrogen tetroxide, that is, the mass of one mole of the compound, is 92.011 \(\frac{g}{mole}\). Then the number of moles that 1.25 grams of the sample contain can be calculated by:
\(amount of moles=1.25 gx\frac{1 mole}{92.011 g}\)
Then:
amount of moles= 0.014 moles
On the other hand, Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole and it applies to any substance.
Then you can apply the following rule of three: if you can define Avogadro's number, 1 mole of the compound contains 6.023×10²³ molecules, 0.014 moles contains how many molecules?
\(number of molecules=\frac{0.014 molesx6.023x10^{23} molecules}{1 mole}\)
number of molecules= 8.4322×10²¹
Finally, there are 8.4322×10²¹ molecules N₂O₄ molecules in a 1.25 g sample of dinitrogen tetroxide.
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How many atoms of oxygen are in one molecule of water (H2O)? one two four three
Answers
Answer:
there is one atom of oxygen and two atoms of hydrogen
Explanation:
Draw the structure of phosphatidylserine and discuss its components
Answers
Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.
The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.
The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.
Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.
The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.
It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.
In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.
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Calculate the molar solubility, S , of CuS if it has a Ksp value of 6×10−37.
Answers
The molar solubility of CuS is 7.8 x 10⁻¹⁹ M.
The solubility product expression for CuS is:
Ksp = [Cu²⁺][S²⁻]Since CuS dissociates to form one Cu²⁺ ion and one S²⁻ ion, the molar solubility of CuS can be represented as x. Therefore, at equilibrium:
[Cu²⁺] = x[S²⁻] = xSubstituting these values in the Ksp expression:
Ksp = x²Solving for x, we get:
x = √(Ksp) = √(6 x 10⁻³⁷) = 7.8 x 10⁻¹⁹ MTherefore, the molar solubility of CuS is 7.8 x 10⁻¹⁹ M.
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The complete question is:
Calculate the molar solubility, S , of CuS if it has a Ksp value of 6×10⁻³⁷.
30 points please help
which kind of energy is stored in the bonds between molecules that make up food?
kinetic energy
potential energy
thermal energy
chemical energy
Answers
Answer:
Chemical Energy is stored in food molecules
Answer:
chemical energy
Explanation:
because none of the other make sense
Describe the evidence for Mercury having a molten iron core
Answers
How can air pollution affect plants?
A. Air pollution can block sunlight from reaching plants.
B. Air pollution can affect the water plants need.
C. Air pollution absorbs carbon dioxide.
D. Air pollution can change normal temperatures of a region.
Answers
Answer:
C. air pollution absorbs carbon dioxide
Explanation:
Carbon dioxide's role in the greenhouse effect is a major contributor to air pollution. Radiation and heat emanating from the earth's surface need to be released out into the atmosphere. But because carbon dioxide levels are so high, there is an ozone effect on the ground level.
In the bond that forms between Aluminum and Fluorine, how many of each ion is needed in order to form a neutral compound?
A. 1 Aluminum ion 3 Fluorine ions
B.3 Aluminum ions. 1 Fluorine ion
C. 3 Aluminum ions. 3 Fluorine ions
D. 1 Aluminum ion 1 Fluorine ion
Answers
Answer:
The answer is a
. Which one is NOT an INDICATOR that a chemical has occurred
A) Gas is produced
B) Precipitate is produced
C) Change in energy
D) Change in mass
Answers
For a radical addition reaction involving HBr and propene, sort each reaction step into the following categories: CH3CH=CH2 + HBr CH3CH2CH2Br
Answers
Answer:
Explanation: Breaking double bond and adding HBr with a catalyst as hydrogen peroxide.
Calculate the number of CO2
molecules ( NCO2
) in 0.0734 mol
of CO2
Answers
Answer:
4.42 x 10^22 molecules
Explanation:
1 mole of CO2 has 6.022 x 10^23 molecules
=> 0.0734 x 6.022 x 10^23 = 4.420148 x 10^22 or 4.42 x 10^22
When an alarm sounds in the laboratory, it is important to respond _______ and remain ______. Listen for any other instructions, turn off any _______ in use, and be prepared to leave immediately.
1) calmly
2) quiet
3) equipment
Answers
When an alarm sounds in the laboratory, it is important to respond quickly and remain calm. Listen for any other instructions, turn off any equipment in use, and be prepared to leave immediately.
What is laboratory?
Laboratory is a place where scientific experiments and measurements are performed. It is equipped with various types of equipment and instruments to carry out experiments and tests. Laboratories are usually used by scientists and technicians to conduct experiments, analyze samples, and conduct research. It is an area that is designed to be kept clean and organized in order to ensure safety and accuracy when conducting experiments. Laboratories can be found in many different settings such as hospitals, universities, research and development centers, and manufacturing facilities.
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Reflect on the learning activities titled “Hypothesis”, “Variables and Hypothesis” and “Constructing a Hypothesis”. Describe some similarities and differences between a question that comes in response to an observation, and a scientific research question? Cite quotes from the readings to support your answer. Where do variables fit into this thinking? In other words, if you imagine a number line with observation questions at one end and scientific research questions at the other, what role do variables play anywhere along this continuum?
Answers
The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.
The following quotes from the readings illustrate this distinction:"A scientific question is one that can be answered by using scientific investigation. In contrast, an observation question is one that comes in response to observing or experiencing something in the natural world" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."An important feature of a scientific question is that it should be answerable within a reasonable amount of time and with the resources available" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."Research questions can be narrow or broad, depending on the scope of the research" (Constructing a Hypothesis).The concept of variables is crucial to both observation and scientific research questions, but they play different roles depending on where they fall on the continuum. Observation questions are usually less precise and may not require much consideration of variables. On the other hand, scientific research questions are likely to include a rigorous examination of variables and their potential effects."Variables are an essential part of a scientific experiment. They are the things that change in an experiment" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."Variables are important because they can affect the outcome of the research" (Constructing a Hypothesis).In summary, observation questions and scientific research questions share some similarities, but the latter is more specific, has a defined methodology, and may require more consideration of variables.For such more question on Hypothesis
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Balance the single replacement chemical reaction.
Answers
Explanation:
B) 3CuCl2+2AL..….2AlCl3+3Cu
hope it helps.
Balanced Equation:
3CuCl₂ + 2Al = 2AlCl₃ + 3Cu
Glucose, C6H12O6, is used to prepare intravenous feeding solutions. What volume of 5.0 % W/V glucose solution can be prepared using 125 g of glucose? Show your working.
Please if the answer is correct, ill give brainliest
Answers
250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.
We use the below formula to solve our problem,w/v = [ mass of solute (g) / volume of solution (mL) ] × 100
Substitute the values from our problem,5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100
Rearranging the formula, we havevolume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100
Substitute further for w/v,volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100
Simplify the expression,volume of solution (mL) = [ 125 g / 0.05 ] x 100
Hence, the volume of solution (mL) = 250,000 mL or 250 LWhat gas would you monitor during the phosynthesis to check the products?
Answers
As oxygen is the product of photosynthesis
Carbon dioxide + water -> oxygen + glucose
When water reaches the metastable state, the phase of water will be?
Answers
Answer:
water, when the metastable state is reached, is cooled below the zero temperature. It freezes abruptly. this is called metastable. They are not at equilibrium per se; as at negative temperatures the only equilibrium state of water is ice.
Explanation:
What type of reaction is shown below:
Al₂O3 (s) → Al(s) + +O₂(g)
O Acid/Base Neutralization
O Synthesis
O Double Replacement
O Decomposition
O Single Replacement
O Combustion
Answers
Answer: Decomposition
Explanation:
The compound, (Aluminum Oxide), decomposes to form Aluminum and Oxygen.
An aqueous KNO3 solution is made using 75.1 g of KNO3 diluted to a total solution volume of 1.95 L .Calculate the molarity of the solution. (assume a density of 1.05 g/mL for the solution)
Calculate the molality of the solution.
Calculate the mass percent of the solution.
Answers
Answer:
- \(M=0.38M\)
- \(\\ \% m=3.67\%\)
Explanation:
Hello,
In this case, since the molar mass of potassium nitrate is 101.1 g/mol, we can compute the molarity as follows:
\(M=\frac{75.1g*\frac{1mol}{101.1g} }{1.95L} \\\\M=0.38M\)
Moreover, as the mass percent is computed as:
\(\% m=\frac{m_{KNO_3}}{m_{solution}} *100\%\)
Thus, by using the given density of the solution, we obtain:
\(\% m=\frac{75.1g}{1.95L*\frac{1000mL}{1L}*\frac{1.05g}{1mL} } *100\%\\\\ \% m=3.67\%\)
Regards.
For clouds to form water vapor in the air must condense and change from gas to a liquid
Answers
Answer:
yes
Explanation:
clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals
ZSM-5, a catalyst material, has a surface area of 581 m²/g. What is the surface
area of this material in cm²/mg?
Answers
ZSM-5 is a catalyst material, which has a surface area of 581 m²/g. This is equivalent to a surface area of 5810 cm²/mg.
What is a catalyst?A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. Catalysts have large surface areas to increase the reaction rate.
Biological catalysts are known as enzymes.
ZSM-5 is a catalyst material, which has a surface area of 581 m²/g. We want to convert this value to cm²/mg.
Step 1: Convert 581 m²/g to cm²/g.We will use the conversion factor 1 m = 100 cm.
581 m²/g × (100 cm/1 m)² = 5.81 × 10⁶ cm²/g
Step 2: Convert 5.81 × 10⁶ cm²/g to cm²/mg.We will use the conversion factor 1 g = 1000 mg.
5.81 × 10⁶ cm²/g × (1 g/1000 mg) = 5810 cm²/mg
ZSM-5 is a catalyst material, which has a surface area of 581 m²/g. This is equivalent to a surface area of 5810 cm²/mg.
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3
Directions: Drag each tile to the correct box.
Three phases of waler are shown below.
Put the phases in order from fastest particle molion to slowest particle molion.
liquid water
>
steam
ice
Reset
Submit
Answers
Answer:
In order from fastest to slowest, Steam > Liquid Water > Ice
Explanation:
As temperatures rise, particles are allowed to move faster and more freely. If you think about the phases of matter, the more compact something is (solids), the less the particles are able to move. Taking the temperate of ice into consideration, the cold further restricts fast movement of particles, whereas gas (especially steam in this case), in hot temperatures, is able to move quickly and freely in the atmosphere.
ionic bonding: the transfer of electrons to form an ionic bond element no. of valence e- dot structure transfer of electrons ions formed compound formed name of compound na f mg o ba cl al o li p al n answers
Answers
Ionic bonding is a type of chemical bond that occurs when electrons are transferred between atoms to form ions. The resulting ions are attracted to each other by their opposite charges and form an ionic compound. Here is a summary of the information you provided:
Element: Na (sodium)
Number of valence electrons: 1
Dot structure: Na
Transfer of electrons: Na loses 1 electron to become Na+
Ions formed: Na+ and Cl-
Compound formed: Sodium chloride (NaCl)
Name of compound: Salt
Element: F (fluorine)
Number of valence electrons: 7
Dot structure: F
Transfer of electrons: F gains 1 electron to become F-
Ions formed: F- and Mg2+
Compound formed: Magnesium fluoride (MgF2)
Element: O (oxygen)
Number of valence electrons: 6
Dot structure: O
Transfer of electrons: O gains 2 electrons to become O2-
Ions formed: Ba2+ and O2-
Compound formed: Barium oxide (BaO)
Element: Li (lithium)
Number of valence electrons: 1
Dot structure: Li
Transfer of electrons: Li loses 1 electron to become Li+
Ions formed: Li+ and Cl-
Compound formed: Lithium chloride (LiCl)
Element: P (phosphorus)
Number of valence electrons: 5
Dot structure: P
Transfer of electrons: P gains 3 electrons to become P3-
Ions formed: Al3+ and P3-
Compound formed: Aluminum phosphide (AlP)
Element: N (nitrogen)
Number of valence electrons: 5
Dot structure: N
Transfer of electrons: N gains 3 electrons to become N3-
Ions formed: Al3+ and N3-
Compound formed: Aluminum nitride (AlN)
Why does mass decrease when sugar dissolved in water
Answers
Answer:
Because the same amount of sugar is still there. The solid sugar crystals break apart in water as the sugar dissolves, but the individual sugar particles or molecules are still present and do not change as a result of dissolving in the water. The combined mass of the sugar and water shouldn't change.
You sent
Can you please review the following to ensure that I'm doing this right ?
If I have a medication (powder) that is 1 gram / 100gallons of water and I want to treat a 75gallon aquarium.
1 gram = 1mL
Let's say I take 1 gram and add it to a bottle of 40mL of water. Shake it up and then draw it up with a syringe that is in MLs.
Is this the correct dimensional analysis
40MLs x 1gram/100gallons x 75 gallons = 30 MLs
So then from the solution in the bottle I would draw up 30 mLs and add that to the fish tank?
Is this correct
Answers
The volume of medication required for 75 gallons is 30 mL.
What is the correct procedure for determining the volume of a medication powder that is 1 gram / 100gallons of water required to treat a 75 gallon aquarium?The correct procedure for determining the volume of a medication powder that is 1 gram / 100gallons of water required to treat a 75 gallon aquarium is the procedure which ensures that the answer expressed in the proper units.
The required concentration of the medication is 1 gram / 100gallons of water.
Volume of water to be be treated is 75 gallon.
1 g of the medication is dissolved in 40 mL of water.
Therefore, 40 mL of the medication contains 1 g of the medication powder.
40 mL of the medication will treat 100 gallons of water.
Volume of medication required for 75 gallons will be:
Volume of medication required for 75 gallons = 40 mL * 1 g/ 100 gallons * 75 gallons
Volume of medication required for 75 gallons = 30 mL
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Which compounds produce three ions per formula unit by dissociation when dissolved in water? (Select all that apply)a) K2SO4b) Al(NO3)3c) Li3PO4d) Ca(NO3)2
Answers
These four are soluble compounds and we will determine which of them produce three ions by looking at their dissociation equations.
a) K₂SO₄ ----> 2 K⁺ + SO₄²⁻ (produces 3 ions)
b) Al(NO₃)₃ ---> Al³⁺ + 3 NO₃⁻ (produces 4 ions)
c) Li₃PO₄ ----> 3 Li⁺ + PO₄³⁻ (produces 4 ions)
d) Ca(NO₃)₂ ----> Ca²⁺ + 2 NO₃⁻ (produces 3 ions)
Answer: a) K₂SO₄ and d) Ca(NO₃)₂
Ammonia is often used as a cleaning fluid. In order to make the strongest possible solution of ammonia, would you use hot water or cold water? Why?
Answers
Based on the effect of temperature on reaction rate, to make the strongest possible solution of ammonia, it is best to use hot water.
How does temperature affect the rate of a chemical reaction?The rate of a chemical reaction is increases with increase in temperature.
This increase in rate of reaction is observed because the number of particles with energy greater than or equal to the activation energy increases.
Therefore, to make the strongest possible solution of ammonia, it is best to use hot water.
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Forensics:
roshni, a forensic scientist, has ruled out several different drugs when testing a substance found in a car. She suspects that the substance is cocsine, what should roshni do next?
1-Perform a confirmatory test
2-Put the substance in a bag, label it, and send it to a DEA office
3-Confer with a colleague about her suspicions.
4-Collect a blood sample and see if it also contains the same substance
Answers
Since she suspects that the substance is cocsine, the thing that she should do next is option 1-Perform a confirmatory test.
How the Evidence Is Collected?The way that Drug evidence is collected is that from any crime scene, evidence is obtained, photographed, packaged, documented as well as been sent for analysis and then the forensic scientist will carry out the Analysis.
Since the evidence has been sent to Roshni, all she has to do is to carry out the confirmatory test to see if the drug is what she suspected.
Therefore, Since she suspects that the substance is cocsine, the thing that she should do next is option 1-Perform a confirmatory test.
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A solution is prepared by dissolving 108.4 g HCl in enough water to make 150.0 L of solution.
Calculate the H+ concentration, [H+], and pH of this solution.
Answers
The [H⁺] is 0.019 M and the pH of the solution is 1.72
Since HCl is a strong acid with a single ionizable hydrogen ion, the concentration of H⁺ ions will be same as the molar concentration of HCl solution.
\(\rm Molar\ concentration \ of \ HCl\ [HCl] = \frac{no. \ of\ moles\ of\ HCl}{Volume\ of\ the\ solution[L]}\)
\(\rm Number\ of\ moles\ of\ HCl = \frac{Given\ mass}{Molecular\ mass}\)
\(= \frac{108.4}{36.5}\)
\(= 2.96 \ moles\)
Therefore,
\(\rm [HCl] = \frac{2.96}{150.0}\)
\(\rm [HCl] = 0.019\ M\)
Therefore, [H⁺] = 0.019 M
Since, pH = - log [H⁺]
= - log [0.019]
= 1.72
The [H⁺] is 0.019 M and the pH of the solution is 1.72.
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The iodide in a sample that also contained chloride was converted to iodate by treatment with an excess of bromine: The unused bromine was removed by boiling; an excess of barium ion was then added to precipitate the iodate: In the analysis of a 1.54-g sample, 0.0596 g of barium iodate was recovered. Express the results of this analysis as percent potassium iodide.
Answers
Answer: The percentage of potassium iodide in the sample is 2.63 %.
Explanation:
The chemical equation for the reaction of iodide ions with bromine gas follows:
\(I^-+3Br_2+3H_2O\rightarrow 6Br^-+IO_3^-+6H^+\) (i)
The chemical equation for the reaction of iodate ions with barium ions follows:
\(Ba^{2+}+2IO_3^-\rightarrow Ba(IO_3)_2\) ......(ii)
To calculate the number of moles, we use the equation:
\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\)
Given mass of barium iodate = 0.0596 g
Molar mass of barium iodate = 487.13 g/mol
Using equation 1:
\(\text{Moles of barium iodate}=\frac{0.0596 g}{487.13 g/mol}\\\\\text{Moles of barium iodate}=1.22\times 10^{-4} moles\)
By Stoichiometry of the reaction (ii):
1 mole of barium iodate is produced by 2 moles of iodate ions
So, \(1.22\times 10^{-4} moles\) of barium iodate will be produced by \(\frac{2}{1}\times 1.22\times 10^{-4} =2.44\times 10^{-4}moles\) of iodate ions
By the stoichiometry of the reaction (i):
1 mole of iodate ions are produced by 1 moles of iodine ions
So, \(2.44\times 10^{-4} moles\) of iodate ions will be produced by \(\frac{1}{1}\times 2.44\times 10^{-4} =2.44\times 10^{-4}moles\) of iodine ions
Moles of potassium iodide = Moles of iodide ions = \(2.44\times 10^{-4}\)
Since, the molar mass of potassium iodide = 166 g/mol
Using equation 1:
\(\text{Mass of potassium iodide}=2.44\times 10^{-4}mol\times 166 g/mol\\\\\text{Mass of potassium iodide}=0.0405 g\)
To calculate the percentage by mass of a substance, the equation used is:
\(\text{Percent by mass}=\frac{\text{Mass of a substance}}{\text{Mass of solution}}\times 100\)
Mass of a solution = 1.54 g
Mass of potassium iodide = 0.0405 g
Using above equation:
\(\text{Percent potassium iodide}=\frac{0.0405 g}{1.54g}\times 100\\\\\text{Percent potassium iodide}=2.63\%\)
Hence, the percentage of potassium iodide in the sample is 2.63 %.
Expressing the results of potassium iodide in percentage = 2.63%
The chemical reaction of iodine ions with Bromine gas can be expressed as :
I⁻ + 3Br₂ + 3H₂O -- > 6Br⁻ + IO₃ + 6H⁺ ----- ( 1 )
Chemical reaction between iodate ions with barium ions can be expressed as : Ba²⁺ + 2IO⁻₃ ------> Ba ( IO₃ )₂ --------- ( 2 )
Step 1 : Calculate the number of Barium iodate moles
mass of Barium iodate = 0.0596 g
molar mass of Barium iodate = 487.13 g/mol
from equation ( 1 )
moles of Barium iodate = ( 0.0596 ) / ( 487.13 ) = 1.22 * 10⁻⁴ moles
also from equation ( 1 ) the moles of potassium iodide = moles of iodide ions
= 2.44 * 10⁻⁴
molar mass of potassium iodide = 166 g/mol
Next step : Determine the mass of potassium iodide
moles of potassium * molar mass
= 2.44 * 10⁻⁴ * 166 g/mol = 0.0405 g
Final step : Determine the percentage of potassium iodide in the solution
Percentage = ( mass of potassium iodide / mass of solution ) * 100
= ( 0.0405 / 1.54 ) * 100
= 2.63%
Hence we can conclude that potassium iodide in percentage = 2.63%
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45. Assume that 0.504 g of H₂ gas at STP reacts with
excess CuO according to the following equation:
Cuo(s) + H₂(g) → Cu(s) + H₂O(g)
Make sure the equation is balanced before beginning
your calculations.
a. How many liters of H₂ react?
b. How many moles of Cu are produced?
C. How many grams of Cu are produced?
Answers
CuO(s) + H2(g) → Cu(s) + H2O(g)
a. To find the volume of H2 gas at STP, we can use the ideal gas law:
PV = nRT
At STP, the pressure (P) is 1 atm and the temperature (T) is 273 K. The volume (V) of 1 mole of gas at STP is 22.4 L. So, the number of moles (n) of H2 gas is:
n = PV/RT = (1 atm) x V/(0.0821 L·atm/mol·K x 273 K) = V/22.4
We know that 0.504 g of H2 gas reacts. The molar mass of H2 is 2 g/mol. So, the number of moles of H2 gas is:
n = m/M = 0.504 g/2 g/mol = 0.252 mol
Now we can find the volume of H2 gas:
V = n x 22.4 L/mol = 0.252 mol x 22.4 L/mol = 5.65 L
Therefore, 5.65 liters of H2 gas react.
b. From the balanced equation, we can see that the mole ratio of CuO to Cu is 1:1. So, the number of moles of Cu produced is also 0.252 mol.
c. To find the mass of Cu produced, we can use the molar mass of Cu, which is 63.5 g/mol:
mass of Cu = number of moles of Cu x molar mass of Cu
= 0.252 mol x 63.5 g/mol
= 16.02 g
Therefore, 16.02 grams of Cu are produced.