Answer:
addition of aqueous hydrochloric acid
Explanation:
The solubility of copper (ll) hydroxide in water is negligible. This implies that the substance is only slightly soluble in water.
However, the addition of aqueous hydrochloric acid leads to the following reaction;
Cu(OH)2 + 2HCl ---------> CuCl2 + 2H2O
Copper II chloride is soluble in water hence the crystals dissolve when stirred. and the molar solubility increases.
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1) What have been the wider effect on the community of nuclear accidents? (Chernobyl)
Answer:
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Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
If 6 moles of CO reacted with excess Fe2O3, then how many moles of Fe were produced?
Answer:
4 moles Fe(s)
Explanation:
Fe₂O₃(s) + 3CO(g) → 3CO₂(g) + 2Fe(s)
Reaction shows a 3:2 ratio between CO(g) & Fe(s) ...
∴moles of Fe(s) produced = 2/3(6) moles Fe(s) produced = 4 moles Fe(s)
Iron is extracted from its ore (hematite) in the blast furnace. Which gas is produced as a waste product?
Answer:
CO2
Explanation:
CO2 or carbon dioxide is produced when iron is extracted from its ore. Carbon monoxide Co is used as reducing agent in iron extraction. In this reaction iron ore is reduced to iron and CO is oxidized to CO2 or carbon dioxide which is released in the process. There extraction of iron is redox reaction.
Which of the following factors is the most in-
fluential in the formation of soil?
Red is dominant to white for flower color in a particular plant. If a red flowered plant (RR) is crossed with a white flowered plant (rr), what color will the offspring be?
Answer:
The offspring will all have red-colored flowers
Explanation:
A dominant character is one that is always expressed when it is present.
A recessive character or trait is one that is only expressed in the absence of the dominant character. Thus, when the dominant and recessive character are both present in an organism, the recessive character will be hidden while the dominant character will be expressed.
According to Menedel's laws of inheritance, in the cross between the dominant (RR) red-flowered plant and the recessive (rr) white-flowered plant, the genotype of the offspring will be as follows:
RR x rr = Rr, Rr, Rr,Rr
The offspring are all heterozygous for flower color. However, since red flower color is dominant over white flower color, all the offspring produced will have red-colored flowers.
How many L of a 7.5 H2SO4 stock solution would you need to prepare a dilute solution 100 L of 0.25M H2SO4
Answer:
3.33 L
Explanation:
We can solve this problem by using the equation:
C₁V₁=C₂V₂Where the subscript 1 refers to one solution and subscript 2 to the another solution, meaning that in this case:
C₁ = 0.25 MV₁ = 100 LC₂ = 7.5 MV₂ = ?We input the data:
0.25 M * 100 L = 7.5 M * V₂V₂ = 3.33 LThus the answer is 3.33 liters.
A volume of 20.0L of oxygen is warmed from -30.0C to SATP condition. What is the new volume if the pressure is kept constant
Difference girteen tungsten and nichrome
Answer:Tungsten is made of tungsten while Nichrome is made of nickel chromium. ... Tungsten is used to make filament of bulbs. Nichrome have high resistivity than tungsten.
Explanation:i hope u have a wonderful night and stay safe
sound travels slower in colder air than it does in warmer air why does the speed of sound depend on air temperature
Answer:
Explanation:
The speed of sound in the air mainly depends on temperature. At high altitudes, where it is much colder, sound travels slower. The higher the temperature, the faster the air molecules are moving to begin with, and the quicker they bump into each other as a sound wave passes through.
Answer:
Air molecules have more energy at higher temperature which means they vibrate faster
Argon atom can exist freely in nature, why
Answer:
Argon can exist freely in nature because it has a full octet of electrons the way its found in the nature is the same way its found in periodic table of element in vast amouts of stabilization.
Which element has two shells, both of which are completely filled with electrons?
Neon
_______________________
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Neon is the element who is having complete electrons in its both the shells
it's atomic mass is 10
in its first shell it has 2 electrons and in 2nd shell it has 8 electrons
it's valency is 0
Hope it helps
The diagram shows the different models of the atom that eventually led to the modern atomic theory.
Which model was proposed as a result of Rutherford's scattering experiment where positive particles did not pass straight through a foil as expected? (5 points)
Model A
Model B
Model C
Model D
Answer:
B.
Explanation:
The atomic model represents the position of the sub-atomic particles. Model A was proposed after Rutherford's scattering experiment where the positive particles were deflected in the middle. Thus, option A is correct.
What was Rutherford's atomic model?Rutherford's atomic model proposed the presence of the positive nucleus in the middle of the atom while the electrons surrounded them in their orbitals with a negative charge.
He performed the scattering experiment where alpha particles emitted by the radioactive element were used to locate the positions of the electrons, neutrons, and protons.
According to the experiment, model A, best fits as the nucleus made of protons and neutrons takes the center of the atom with negative electrons surrounding them. The nucleus is small as compared to the entire atom.
Therefore, option A. model A best proposes Rutherford's model.
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What would be the effect on this reaction of increasing the temperature?
2H + O —> 2H O + energy
2 2 2
Answer:
IT IS NOT C I GOT IT WRONG THE CORRECT ANSWER IS A
The rate of the forward reaction would decrease
Explanation:
A.pex
Water forms according to the equation below: 2H2(g) + O2(g) 2H2O(g) Hrxn = -483.64 kJ How much energy is released during the formation of 1 mol H2O(g)?
Answer:
Hrxn = -241.82 kJ
Explanation:
2H2(g) + O2(g) --> 2H2O(g) Hrxn = -483.64 kJ ............. (i)
The equation for formation of 1 mol of H2O is given as;
H2(g) + 1/2O2(g) --> H2O(g) ................. (ii)
Eqn (ii) is obtained by dividing eqn (i) by 2
That means the heat of reaction for eqn (ii) is given as;
Hrxn = -483.64 kJ / 2
Hrxn = -241.82 kJ
Answer:-241.82 kJ
Explanation:
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How do you write 0.00001 in scientific notation?
Answer:
1×10^-5
hope it helps you
Answer:
According to the text
"Move the decimal 5 times to right in the number so that the resulting number, m = 1, is greater than or equal to 1 but less than 10.
Since we moved the decimal to the right the exponent n is negative. n = -5.
Write in the scientific notation form, m × 10n = 1 × 10-5""
Explanation:
Arrange the following formulas in increasing percentage of nitrogen. Show a NEAT solution.
a) NH4NO3
b) CO(NH2)2
c) NH3
Answer:
c) NH3Explanation:
I HOPE IT HELPS :) VERY MUCH
How many atoms are in 5.31 mol of Iron?
Answer:
3.77 moles of Fe contain 2.27 × 10, 24 as an exponent
Please! I need this quick! THANK YOU!!
Answer:
Force
Explanation:
The force is applied to either pushing or pulling forwarding momentum and movement.
Answer:
A: Force
It is a push/pull that changes the motion of an object
Helpppp pleaseee for 15 points
Answer:
What is filteration:Filtration, the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that permits the fluid to pass through but retains the solid particles. ... In some processes used in the production of chemicals, both the fluid filtrate and the solid filter cake are recovered.
When do we use it:Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a supercritical fluid. Depending on the application, either one or both of the components may be isolated.
In order to separate a salt-water mixture,should a student use filtration:The mixture can be separated by filtration, by dissolving the mixture in water. Salt will dissolve in the water, whereas sand will not.
Explanation:
hope it help's. pls mark as the brainliest.Rocket out.2. How much heat is needed to convert 2.7 moles of ethanol at its boiling
point from liquid to vapor?
Answer:
así que busca, pero la respuesta está en por cierto Explanation:
The quantity of heat needed to convert 2.7 moles of ethanol at its boiling point from liquid to vapor is 104.49 kJ
From the question,
We are to calculate the heat needed to convert 2.7 moles of ethanol from liquid to vapor.
Using the formula
Q = n × ΔHvap
Where Q is the quantity of heat
n is the number of moles
and ΔHvap is the enthalpy of vaporization
From the given information,
n = 2.7 moles
and
ΔHvap of ethanol = 38.7 kJ/mol
Putting the parameters into the formula, we get
Q = 2.7 × 38.7
Q = 104.49 kJ
Hence, the quantity of heat needed to convert 2.7 moles of ethanol at its boiling point from liquid to vapor is 104.49 kJ
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which substance is reduced ?
Cl^2 +2KBr= 2KCl + Br2
Answer:
Initially Br is in -1 oxidation state and Cl in 0 oxidation state. Finally Cl is in -1 o.s. and Br in 0.
This means that Br has oxidised from -1 to 0 and Cl is reduced from 0 to -1.
KBr is reducting agent as it helps Cl to reduce.
Cl2 is oxidising agent as it helps Br to oxidise.
Explanation:
find the area given rectangle.
The length and and breadth of a rectangle are 3abc³ and 4abc units. The area of rectangle is __ sq.unit .
Answer:
The perimeter of a Rectangle P= 2(l + b)
Area of a Rectangle A = l × b
Which equation represents a neutralization reaction?
Answer: The equation represents a neutralization reaction is HNO3(aq) + KOH(aq) → KNO3(aq) + H2O(). The answer is letter C.
Answer:
The answer is C.
Explanation:
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Kindly Help Please!
Can you write the symbol equations for each of the reactions below:
and Can you balance them?
1) Ethane + Oxygen = Carbon Dioxide + Water
2) Butane + Oxygen = Carbon Dioxide + Water
3) Octane + Oxygen = Carbon Dioxide + water
4) Decane + Oxygen = Carbon Dioxide + Water
thank you!
Answer: 1) [tex]2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O[/tex]
2) [tex]2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O[/tex]
3) [tex]2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O[/tex]
4)[tex]2C_{10}H_{22}+31O_2\rightarrow 20CO_2+22H_2O[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.
The balanced chemical reactions will be:
1) Ethane + Oxygen = Carbon Dioxide + Water : [tex]2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O[/tex]
2) Butane + Oxygen = Carbon Dioxide + Water : [tex]2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O[/tex]
3) Octane + Oxygen = Carbon Dioxide + water: [tex]2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O[/tex]
4) Decane + Oxygen = Carbon Dioxide + Water : [tex]2C_{10}H_{22}+31O_2\rightarrow 20CO_2+22H_2O[/tex]
which basic postulates of Dalton's atomic theory are modified by the modern atomic theory
Answer:
Dalton's atomic theory has been modified as
Explanation:
Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes
Answer:
On the basis of new experimental facts, Dalton's atomic theory has been modified as: ... Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes.
Explanation:
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(e) Another student investigated the rate of a different reaction
Table 3 shows the results from the different reaction
Headings that you a
will appear here.
Table 3
Mass lost when the reaction was
complete
9.85 g
Time taken to complete the reaction
2 minutes 30
seconds
Calculate the mean rate of the reaction using Table 3 and the equation:
mass lost in g
mean rate of reaction time taken in s
Give your answer to two decimal places.
Answer:
0.07 g/s.
Explanation:
From the question given above, the following data were obtained:
Mass lost = 9.85 g
Time taken = 2 min 30 s
Mean rate =?
Next, we shall convert 2 min 30 s to seconds (s). This can be obtained as follow:
1 min = 60 s
Thus,
2 min = 2 × 60 = 120 s
Therefore,
2 min 30 s = 120 s + 30 s = 150 s
Finally, we shall determine the mean rate of the reaction. This can be obtained as illustrated below:
Mass lost = 9.85 g
Time taken = 150 s
Mean rate =?
Mean rate = mass lost / time taken
Mean rate = 9.85 / 150
Mean rate = 0.07 g/s
Therefore, the mean rate of the reaction is 0.07 g/s
I need help someone plz
Answer:It has 8grams of hydrgen
Explanation:
You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a
sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly,
what is the limiting reactant?
Answer:
peanut butter
Explanation:
because you have 10 pieces of bread, 4 tbs of peanut butter, and 20 tbs of jelly, meaning you can make 5 sandwwitches with the bread, 4 sandwitches with the peanut butter, and 10 sandwitches with the jelly. so you dont have enough peanut butter to make all the sandwitches
According to the given scenario, If one have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly, the limiting reactant will be peanut butter.
What is a limiting reactant?
The reactant that gets consumed first in a chemical reaction and result in limiting the formation of product is referred to as a limiting reactant.
According to the given scenario, the quantity of peanut butter will get consumed first so it will act as a limiting reactant.
Thus, If one have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly, the limiting reactant will be peanut butter.
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Between which two stages does cell division (cells divide or multiple) first occur?
Captionless Image
a. A and B
b. B and C
c. C and D
d. D and E
Clear selection
Answer: C and D
Explanation:
what is the formula for the compound formed by Ba2+ and Mn04 ?
Answer:
Barium permanganate | Ba(MnO4)2 - PubChem.
Description: Barium permanganate appears as ...
Synonyms: BARIUM PERMANGANATE7787-3...
Molecular Formula: Ba(MnO4)2 or BaMn2O8
Molecular Weight: 375.2 g/mol
Explanation: