Answer:
1.) Cu(NO₃)₂ + 2 NaOH --> Cu(OH)₂ + 2 NaNO₃
2.) CuO + 2 HCl --> H₂O + CuCl₂
Explanation:
Both of these reactions are substitution/double displacement reactions. The base reaction looks like this: AX + BY --> AY + BX. In other words, the negative ion of the first molecule bonds to the positive ion of the second molecule, and vice versa.
The products of the first equation are:
Cu(NO₃)₂ + NaOH --> Cu(OH)₂ + NaNO₃
The OH⁻ and the NO₃⁺ are polyatomic ions, meaning they stay together in these types of reactions. When determining the products, make sure to take note of the charges on the ions because subscripts may be necessary to balance them out.
Now you need to balance the coefficients. When balancing equations, begin with an element that is not present in more than one molecule on either side (ex. the oxygen is in two molecules on the reactant side). Keep in mind that the subscripts should be multiplied by the coefficients when determining the number of some elements.
The balanced first equation is:
Cu(NO₃)₂ + 2 NaOH --> Cu(OH)₂ + 2 NaNO₃
The process for the second equation is nearly identical to the first. The balanced second equation is:
CuO + 2 HCl --> H₂O + CuCl₂
Why is mtDNA so useful in forensic investigations?
Somebody help me this pleaseeeeee
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Answer:
1.the highest point of the wave is the crest while lowest point is trough.
2.?
3. wave length
4. frequency
5. A is crest b is trough c is amplitude and d is wave length
7.a = this is longitudinal wave, b no = letter h represents a compression and letter I represents rarefactions , letter g represents a wave length.
8 . in transverse wave
9. longitudinal wave
10. longitudinal wave
11. transverse wave
12. ?
A sample of gas has an initial volume of 20 L and an initial pressure of
2.5 atm. If the pressure changes to 3.1 atm, what is the new volume, as-
suming that the temperature remains constant?
Show your work.
The new volume of the gas is 16.3 L.
Boyle's lawBoyle's law states that the volume of a fixed mass of gas is inversely proportional to its pressure, at a constant temperature.
To calculate the new volume of the gas, we use the expression from Boyle's law.
Formula:
PV = P'V'............. Equation 1Where:
P = initial pressure of gasV = Initial volume of gasP' = Final pressure of gasV' = Final volume of gasMake V' the subject of the equation
V' = PV/P'............. Equation 2From the question,
V = 20 LP = 2.5 atmP' = 3.1 atmSubstitute these values into equation 2
V' = (20×2.5)/3.1V' = 16.13 L.Hence, The new volume of the gas is 16.3 L.
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What are the four abbreviations that are used to show the states of substances in chemical reactions?
Copper (II) Oxide is mixed with Zinc Iodide
Balanced Chemical Equation:
Answer:
CuO + Zn → ZnO + Cu
Explanation:
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Radon-22 has a half –life of approximately 6 days. If you begin with a sample containing 40 grams of radon, how many grams of radon will be left after 24 days?
why can ionic compounds
Conduct electricity ?
Explanation:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.
what is electrochemistry?
Answer:
The study of electricity in chemistry.
What led to a change in carbon dioxide in biodome files
Answer:
The decrease of decomposers. The decrease of decomposers led to a change in carbon dioxide in biodome files.
90 is 50% of what number?
Part = Whole x Percent
P:
W:
%
Answer:
90 is 50% of 180
Explanation:
Just multiply 80 by 2 for 50%
A 5.00 L sample of helium expands to 15.0 L, at which point the pressure is measured to be 0.720 atm. What was the original pressure of the gas
The original pressure of a gas that has 5.00 L of its sample expanded to 15.0 L, at which point the pressure is measured to be 0.720 atm is 2.16atm.
How to calculate pressure?The pressure of a gas can be calculated using the Boyle's law equation as follows:
P1V1 = P2V2
Where;
P1 = initial pressureP2 = final pressureV1 = initial volumeV2 = initial volumeP1 × 5 = 15 × 0.720
5P1 = 10.8
P1 = 10.8 ÷ 5
P1 = 2.16atm
Therefore, the original pressure of a gas that has 5.00 L of its sample expanded to 15.0 L, at which point the pressure is measured to be 0.720 atm is 2.16atm.
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If you weighed out 22 grams of Al2O3 on a scale, how many moles of Al2O3 is that? Show your work.
Answer: Point nine six grams per mole which are often just written G / mo L and that's the molar mass or molecular weight for al2o3 aluminum oxide.
Explanation:
Write the balanced equation for the reaction of sodium with water to form sodium hydroxide and
hydrogen
2 Na ( s ) + 2 H2O ( l ) = 2 NaOH ( aq ) + H2 ( g )
Here's the balanced equation
Which force controls the size of an atomic nucleus?.
Answer:
strong nuclear force
Explanation:
1, a force that acts on charged particles
2, a force that holds atomic nuclei together
3, gravity, weak nuclear, electromagnetic, strong nuclear
4, strong nuclear force
5, Gravity and the electromagnetic force have infinite ranges while the nuclear forces have very small ranges.
100% :)
Using the reaction below, calculate how many grams of CO2 is produced from 100 grams of CH4. CH4 + 2 O2 → CO2 + 2 H2O Round your answer to the 2nd decimal place (hundredths).
Answer:
274.08 g of CO2
Explanation:
please see paper for work!
Burning hydrogen is an example of a chemical reaction. The reaction is
shown in the diagram. Which of the following statements about energy in
this reaction is the most accurate?
There is no energy in this reaction
more sugar dissolves in hot water than in cold water why?
Answer:
Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, causing it to dissolve faster.
Explanation:
A gas occupies 30. L at 2.0 atm pressure and 27°C. Calculate the volume of the gas if
the pressure remains at 2.0 atm, but the temperature is raised to 54°C.
Answer:
V2 = 33L
Explanation:
KNOW THAT:
V1 = 30L
P1 = 2.0atm
T1 = 27 + 273.15 = 300.15k (it's help to be in Kelvin)
P2 = 2.0 atm
T2 = 54 = 273.15 = 327.15
V2 = ?
We have an equation: P1V1/T1 = P2V2/T2
Multiply both side for T2 to remove it, divided both side for P2 to remove it. So we can left with V2, and that is what we want to find.
T2P1V1/T1P1 =>> V2= 33L
What are some common structures of all cells?
help!
If the distance between a proton and electron is cut in half, how will that affect the electric force?
A. Cut in half
B. Doubles
C. Quadruples
D. Decreased by four times
Answer:
it will doublethe force attraction
In the graphic, X represents which
element?
12
6
2x
А
12
Magnesium
18
Argon
Ar
6
Carbon
С
Mg
The element which X represents in the given graphic is Carbon
Determining the identity of an elementFrom the question, we are to determine the element in which X represents
Comparing the given graphic with the atomic notation shown in the attachment, X has a mass number of 12 and an atomic number of 6
The element which has a mass number of 12 and an atomic number of 6 is Carbon.
Hence, the element which X represents in the given graphic is Carbon.
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Select all of the examples of sound resonance. A. plucking a harp string producing a high tone B. hearing "the ocean" in a seashell held up to the ear C. wearing sound cancellation earphones to block out noise D. blowing over the opening of a bottle producing a low tone E. noticing a change in pitch of the siren as a firetruck moves past
Answer
I know the answer
Explanation:
Who was the first person to suggest the existence
of atoms?
Dalton
Democritus
Proust
O
Thomson
Answer is C
Answer:
democritus is the first person
I NEED HELP ASAP! I don’t know like how to draw it
Explanation:
Take the first 6 going down and that's how your gonna do it
What is respiration explain in own words please
Answer:
The process in which we breathe out carbon dioxide and breathe in oxygen.
Explanation:
What is the constant movement
of water from the ground, to the
sky, and back again called?
A rain
B snow
C water cycle
D rain clouds
Answer:
C the water cycle
Explanation:
The water gets evaproated, then it becomes clouds and thn it makes precipitation! The correct answer is the water cycle!
Have an amazing day!!!
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Difference between carbon monoxide and carbon dioxide.
Answer: Number of oxygen atoms
because carbon dioxide is named CO2 which means 1 carbon 2 oxygen and monoxide is CO or 1 carbon one oxygen
Explanation:
Convert 30.0g Cu(NO3)2 to moles
please help
Answer:
0.2moles
Explanation:
1 grams Cu(NO3)2 to mol = 0.159952398166305
10 grams Cu(NO3)2 to mol = 0.159952398166305
if we round that up the only valid answers are either 0.1 or 0.2
How many C8H18 particles would be in 12.6 moles of octane (C8H18)?
Taking into account the definition of Avogadro's number, 7.59×10²⁴ particles of C₈H₁₈ would be in 12.6 moles of octane.
Definition of Avogadro's NumberAvogadro's Number or Avogadro's Constant 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. Avogadro's number applies to any substance.
Amount of C₈H₁₈ particlesThen you can apply the following rule of three: If by definition of Avogadro's number 1 mole of C₈H₁₈ contains 6.023×10²³ particles, 12.6 moles of the compound contains how many particles?
amount of particles of C₈H₁₈= (6.023×10²³ particles × 12.6 mole)÷ 1 mole
amount of particles of C₈H₁₈= 7.59×10²⁴ particles
Finally, 7.59×10²⁴ particles of C₈H₁₈ would be in 12.6 moles of octane.
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Which statement about solubility is true?
A.Solubility is how much solid only will dissolve in liquid only.
B.Solubility is how much solvent will dissolve in solute.
C.Solubility is how much solute will precipitate out of solvent.
D.Solubility is how much solute will dissolve in solvent.
Answer:
C. Solubility is how much solute will dissolve in solvent.
Explanation:
Solvent dissolves solutes, not the other way around, and solids aren't the only things that have solubility, I don't see how precipitation has anything to do with this, so answer C. is the correct answer. Also, I took the test and got the answer right.
The statement that is true about solubility is "Solubility is how much solute will dissolve in solvent".
What is solubility?Solubility is the amount of solute that can be dissolved in a solvent. Generally, the solubility of most solutes increases with an increase in the temperature of the solvent.
The property that can help sugar molecules or salt crystals to dissolve is known as solubility.
Factors that affect solubility include:
Concentration of the solute
Temperature
Pressure
Polarity of the solute and the solvent
Given options are-
Solubility is how much solid only will dissolve in liquid only.
Solubility is how much solvent will dissolve in solute.
Solubility is how much solute will precipitate out of solvent.
Solubility is how much solute will dissolve in solvent.
Therefore, The statement that is true about solubility is "Solubility is how much solute will dissolve in solvent".
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