Answer:
1. 9.45 g
2. 66.9%
Explanation:
The balanced equation for the reaction is given below:
Cu(s) + 4HNO3(aq) —> Cu(NO3)2(aq) + 2NO2(g) + 2 H2O(l)
Next, we shall determine the mass of Cu that reacted and the mass of Cu(NO3)2 produced from the balanced equation. This can be obtained as follow:
Molar mass of Cu = 63.5 g/mol
Mass of Cu from the balanced equation
= 1 × 63.5 = 63.5 g
Molar mass of Cu(NO3)2 = 63.5 + 2[14 + (3×16)]
= 63.5 + 2[14 + 48]
= 63.5 + 2[62]
= 63.5 + 124
= 187.5 g/mol
Mass of Cu(NO3)2 from the balanced equation = 1 × 187.5 = 187.5 g
Summary:
From the balanced equation above,
63.5 g of Cu reacted to produce 187.5 g of Cu(NO3)2.
1. Determination of the theoretical yield of Cu(NO3)2. This can be obtained as follow:
From the balanced equation above,
63.5 g of Cu reacted to produce 187.5 g of Cu(NO3)2.
Therefore, 3.20 g of Cu will react to produce = (3.20 × 187.5) / 63.5 = 9.45 g of Cu(NO3)2.
Thus, the theoretical yield of Cu(NO3)2 is 9.45 g.
2. Determination of the percentage yield of Cu(NO3)2.
Actual yield of Cu(NO3)2 = 6.32 g
Theoretical yield of Cu(NO3)2 = 9.45 g.
Percentage of the Cu(NO3)2 =?
Percentage yield = Actual yield /Theoretical yield × 100
Percentage yield of Cu(NO3)2 = 6.32/9.45 × 100
Percentage yield of Cu(NO3)2 = 66.9%
The theoretical yield of Cu(NO₃)₂ is 9.445 g
The percent yield of Cu(NO₃)₂ is 66.91%
From the question.
We are to determine the theoretical yield of Cu(NO₃)₂,
First and foremost, we will write the balanced chemical equation for the reaction properly
The balanced chemical equation for the reaction is
Cu(s) + 4HNO₃(aq) → Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)
This means
1 mole of Cu will react with 4 moles of HNO₃ to produce 1 mole of Cu(NO₃)₂, 2 moles of NO₂ and 2 moles of H₂O
To determine the theoretical yield of Cu(NO₃)₂,
First, we will determine the number of moles of Cu that reacted
Mass of Cu = 3.20 g
Molar mass of Cu = 63.546 g/mol
From the formula
[tex]Number\ of\ moles =\frac{Mass}{Molar\ mass}[/tex]
∴ Number of moles of Cu = [tex]\frac{3.20}{63.546}[/tex]
Number of moles of Cu present = 0.050357 moles
The number of moles of Cu that reacted is 0.050357 moles
Since,
1 mole of Cu will react with 4 moles of HNO₃ to produce 1 mole of Cu(NO₃)₂
Then,
0.050357 moles of Cu will react with 0.201428 moles of HNO₃ to produce 0.050357 moles of Cu(NO₃)₂
∴ 0.050357 moles of Cu(NO₃)₂ will be produced during reaction
Now, for the theoretical yield of Cu(NO₃)₂
From the formula
Mass = Number of moles × Molar mass
Molar mass of Cu(NO₃)₂ = 187.56 g/mol
∴ Theoretical yield of Cu(NO₃)₂ = 0.050357 × 187.56
Theoretical yield of Cu(NO₃)₂ = 9.445 g
Hence, the theoretical yield of Cu(NO₃)₂ is 9.445 g
For the percent yield of Cu(NO₃)₂
[tex]Percent \ yield = \frac{Actual \ yield}{Theoretical \ yield } \times 100 \%[/tex]
From the question
Actual yield = 6.32 g
But,
Theoretical yield = 9.445 g
∴ Percent yield of Cu(NO₃)₂ = [tex]\frac{6.32}{9.445} \times 100\%[/tex]
Percent yield of Cu(NO₃)₂ = [tex]\frac{632}{9.445}\%[/tex]
Percent yield of Cu(NO₃)₂ = 66.91%
Hence, the percent yield of Cu(NO₃)₂ is 66.91%
Learn more here: https://brainly.com/question/13902065
What would have a higher boiling point water or hydrocarbon ( from penny liquid stacking) and why?
Answer:
High amount of energy is required to dissociate these bonds and hence water molecules have a higher boiling point than expected.
Explanation:
how dose dissolving sugar in water show that matter is made up of particles
Answer:
When sugar dissolves, the sugar particles separate from each other and mix with the water particles. When the sugar particles separate, the smaller water particles fit into the spaces between the larger sugar particles. The water and sugar particles are attracted to each other, so they move closer together when they mix.
Explanation:
: )
Uncontrolled energy:
causes destruction
produces order
can make things
can do useful work
Answer:
causes destruction
If I change the volume of a solution from 5.00 L to 10.0 L, what was the new
concentration if the original concentration was 4.0 M? Please help me as soon as possible with explanation.
The new concentration = 2 M
Further explanationDilution is a process of decreasing the concentration of a solution by adding a number of solvents
Can be formulated
M₁V₁=M₂V₂
M₁ = Initial Molarity
V₁ = Initial volume
M₂ = Final Molarity (after dilution)
V₂ = Final volume (after dilution)
V₁=5 L
V₂=10 L
M₁=4 M
The new concentration(M₂) :
[tex]\tt M_2=\dfrac{V_1.M_1}{V_2}\\\\M_2=\dfrac{5\times 4}{10}\\\\M_2=2~M[/tex]
Show the calculation of the molality of a solution made by dissolving 15.9 grams of Ca3(PO4)2 in 400 grams of water.
The molality of a solution : 0.128 m
Further explanationGiven
15.9 g of Ca3(PO4)2 in 400 grams of water.
Required
The molality
Solution
molality = mol solute / kg solvent
solute= Ca3(PO4)2(MW=Molecular Weight: 310.2 g/mol)
mol solute :
[tex]\tt \dfrac{15.9}{310.2}=0.0512[/tex]
The molality :
[tex]\tt \dfrac{0.0512}{0.4~kg}=0.128~m[/tex]
for each pair of compounds below , identify the one that would be expected to have more ionic character.explain you choice. (a)NaBr or HBr (b)BrCl or FCl
Answer:
a)NaBr
b)FCl
Explanation:
To identify which compound is more ionic we will calculate the electronegativity difference.
A) NaBr
Electronegativity of Na = 0.93
Electronegativity of Br = 2.96
Electronegativity difference = 2.96- 0.93 = 2.03
HBr
Electronegativity of H = 2.2
Electronegativity of Br = 2.96
Electronegativity difference = 2.96 - 2.2 = 0.76
NaBr have more ionic character because of large electronegativity difference.
B) BrCl
Electronegativity of Cl = 3.16
Electronegativity of Br = 2.96
Electronegativity difference = 3.16 - 2.96 = 0.2
FCl
Electronegativity of F = 3.98
Electronegativity of Br = 2.96
Electronegativity difference = 3.98 - 2.96 = 1.02
FCl have more ionic character because of large electronegativity difference.
why can a solution be classified as a mixture
Which compound would you expect to be soluble in the nonpolar solvent carbon disulfide?
Answer:
hexane C6H14
IS YOUR ANSWER
Explanation:
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3. The solubility of sodium chlorate in water is 52g / 100g H20. If 0.46 moles of sodium
chlorate are dissolved in 60g of water, is this solution
saturated/supersaturated/unsaturated?
hello! i think the answer is saturated
If you were to add glucose to catalase instead of hydrogen peroxide, would bubbles be produced?
Answer:
No, bubbles would not be produced.
Explanation:
Catalase is an enzyme that catalyses the decomposition of hydrogen peroxide into water (H2O) and oxygen gas (O2). Since oxygen (O2) is a gas, it is physically noticeable as BUBBLES. However, catalase as an enzyme is substrate-specific i.e. it solely acts/breaks down on hydrogen peroxide.
Hence, If one were to add glucose to catalase instead of hydrogen peroxide, oxygen gas observed as BUBBLES will not be produced because catalase will not act on glucose.
What are the rules for writing
names/formulas for covalent
compounds? Give examples
where you need to produce
the formula from the name
AND the name from the
formula
Answer:
When naming molecular compounds prefixes are used to dictate the number of a given element present in the compound. ” Mono-” indicates one, “Di-” indicates two, “Tri-” is three, “Tetra-” is four, “Penta-” is five, and “Hexa-” is six, “Hepta-” is seven, “Octo-” is eight, “Nona-” is nine, and “Deca-” is ten.
Before we can use this equation for
calculations we must first balance it.
What whole number should be placed in the
green box to balance this equation?
2C2H6 + [? ]02 → [ ]CO2 + [ ]H20
Remember, the coefficients should be the
smallest whole numbers possible.
Answer:
2C₂H₆ + [7]O₂ → [4]CO₂ + [6]H₂O
Explanation:
Chemical equation:
C₂H₆ + O₂ → CO₂ + H₂O
Balanced chemical equation:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Step 1:
2C₂H₆ + O₂ → CO₂ + H₂O
Left hand side Right hand side
C = 4 C = 1
H = 12 H = 2
O = 2 O = 3
Step 2:
2C₂H₆ + O₂ → 4CO₂ + H₂O
Left hand side Right hand side
C = 4 C = 4
H = 12 H = 2
O = 2 O = 9
Step 3:
2C₂H₆ + O₂ → 4CO₂ + 6H₂O
Left hand side Right hand side
C = 4 C = 4
H = 12 H = 12
O = 2 O = 14
Step 4:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Left hand side Right hand side
C = 4 C = 4
H = 12 H = 12
O = 14 O = 14
If 765 mL of a gas at 2.78 atm, has the volume Change to 2.47 L , What is the pressure of the
gas in atm?
Answer:
0.87 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question
2.47 L = 2470 mL
We have
[tex]P_2 = \frac{765 \times 2.78}{2470} = \frac{2142}{2470} \\ = 0.867206...[/tex]
We have the final answer as
0.87 atmHope this helps you
What is electronegativity?
Explain the periodic trend -
what is it, why is it that way
Answer:
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to caesium and francium which are the least electronegative at 0.7.
Explanation:
Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. ... These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements
Name the following hydrocarbon:
CH3CH2CH2CH2F
A. 4-fluorobutane
B. 2-fluorobutane
C. 1-fluorobutane
D. 1-fluoropentane
Answer:
The correct answer is (C)
Which is "1-fluorobutane"
Explanation:
Hope this helped if so please leave a "Rating" and "Like" and MARK me Brainliest if it was the BEST answer! THANKS! :)
The name of the hydrocarbon CH3CH2CH2CH2F is 1-fluorobutane.
In naming organic hydrocarbons, we count the number of the parent chain family. Here, we have an alkane with 4 carbons, which means that the parent chain is a family of alkane. The fourth compound in the family of an alkane is butane.
Afterwards, we will determine if there is any substituent attached to any of the carbon atoms in the chain and rank them in a way such that we have the lowest possible number.
Here, the fluorine is attached to the first carbon atom. So, it becomes 1-fluorobutane.
Learn more about the naming of hydrocarbons here:
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10
The reaction in which ammonia is formed is N2(g) + 3H2(g) + 2NH3(). At equilibrium, a
1-L flask contains 0.15 mol H. 0.25 mol N, and 0.10 mol NH. Calculate K., for the reaction.
11.85
23.8
25.0
16
The equilibrium constant (K) : 11.85
Further explanationGiven
Reaction
N₂(g) + 3H₂(g) ⇒ 2NH₃(g)
Required
K(equilibrium constant)
Solution
The equilibrium constant (K) is the value of the concentration product in the equilibrium
The equilibrium constant based on concentration (K) in a reaction
pA + qB -----> mC + nD
[tex]\tt K=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]
For the reaction above :
[tex]\tt K=\dfrac{[NH_3]^2}{[N_2][H_2]^3}\\\\K=\dfrac{0.1^2}{0.25\times 0.15^3}\\\\K=11.85[/tex]
PLEEAASE HELLLP AAAASSSASSSSSPPPPP
Answer:
Concept: Chemical Analysis
Higher humidity indicates a higher concentration of water molecules and hence a higher statistical probability of rain.Hence Fred in Kentucky will need an umbrella tomorrow due to the humidity and stratus clouds.Give brainlist.ANSWERS PLEASE HELP 20 MINUTES LEFT????!!!!?!!???
Answer:
Explanation:
b
Plz help ASAP
Plz and ty
Answer:
It's circulatory system
Hope it's help ^_^
Answer: circilutory
Explanation:
Which of the following are examples of QUALITATIVE data? (seiect all that apply)
None these is qualitative data
The sound of a person's voice
The weight of person
The hair color of a person
The body temperature of a person
Answer:
The hair color of a person
Explanation:
The correct answer would be the hair color of a person.
Qualitative data are data that cannot be measured with any instrument but can only be used to characterize. Unlike quantitative data, these kinds of data can only be observed and recorded but cannot be assigned numerical values, except if coded.
The sound of a person's voice can be quantitative on one hand and qualitative on the other. The intensity of a sound can be measured using a decibel meter and quantitatively assigned a figure, whereas, the quality of the sound can only be characterized and not measured.
Both the weight and the body temperature of a person can be measured using a weighing balance and a thermometer respectively and hence, are considered to be quantitative data when collected.
The color of the hair of a person cannot be measured but can only be observed and characterized. Hence, hair color data constitute qualitative data.
Answer:
hair color
Explanation:
Help me with this . I'm bad at chemistry . I’ll give you a brain list . Don’t answer if u don’t know at all .
Answer:
2.
a.Sodium bromide
b. Magnesium dichloride
c. Lithium iodide
not sure about 3 or 4 sry
What is the name of Bel on the periodic table
Answer:
Nobelium or Beryllium
Suppose that all you know about a certain electron is that its principal quantum number is 3. What are the possible values for the other four quantum numbers
Answer:
Other possible quantum numbers would be.
A). When n = 3,
I = 0,
m1 = 0
ms = +1/2 or -1/2
B). When I = 1,
m1 = -1 or +1
ms = +1/2 or -1/2
C). When I = 2
m1 = -2,-1,0,1 or 2
ms = +1/2 or -1/2.
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Answer:
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What are the coefficients for the reaction _Cl2O5 + _H2O → _HClO3 once it is balanced?
1, 1, 1
1, 1, 2
1, 2, 2
2, 1, 1
Answer:
1, 1, 2
Explanation:
Answer:
Answer is B. 1, 1, 2
Explanation:
<3
What is GRAVITY and WHO discovered it? *
Answer:
Newton discovered it.
Explanation:
Gravity is the attraction between the earth and any object. and gravitational force is the attraction between any two objects.
Answer:
gravity is a force that pulls things towards each other
Explanation:
issac newton is the one who discovered it
What type of minerals make up more than 90% of the earth's crust?
sulfites
silicates
stalagtites
hematites
Answer:
Rocks
Explanation:
Answer:
silicate
Explanation:
True or False: All metals have high melting points.
Answer:
True. All metals have a melting point when it reaches a certain degree of temperature
Explanation:
What does a useful scientific explanation include ??
Answer: scientific explanation
Explanation:
A really good scientific explanation should do two main things: It should explain all the observations and data we have. It should allow us to make testable predictions that we can check using future experiments.
what is the dilution factor if you add a 0.1ml aliquot of a specimen to 9.9 dilutent
The dilution factor : 100
Further explanationThe dilution factor(DF) : ratio of concentration of stock solution and diluted solution or ratio of the volume of final solution to the initial volume from stock solution
From equation of dilution :
M₁V₁=M₂V₂
[tex]\tt DF=\dfrac{M_1}{M_2}=\dfrac{V_2}{V_1}[/tex]
Volume of aliquot = 0.1 ml
Volume of diluent = 9.9 ml
So final volume :
[tex]\tt V_f(final~volume)=volume~aliquot+volume~diluent\\\\V_f=0.1+9.9=10~ml[/tex]
The dilution factor (DF) :
[tex]\tt D_f=\dfrac{V_f}{V_i}\\\\D_f=\dfrac{10}{0.1}=100[/tex]