Oxidation half equation; 2Fe^2+ ----> 2Fe^3+ + 6e
Reduction half equation; 3Cu^2+ + 6e ---->3Cu
What is an oxidation and a reduction reaction?An oxidation-reduction (redox) reaction is a type of chemical reaction that involves the transfer of electrons between two species. Oxidation refers to the loss of electrons by a substance, while reduction refers to the gain of electrons by a substance.
Redox reactions are important in many chemical and biological processes, such as cellular respiration, photosynthesis, corrosion, and combustion. They can also be used in industrial processes, such as electroplating, battery operation, and chemical synthesis.
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The major product during addition of HBr to propene in the presence of peroxide is
A. 2-Bromopropane
B. 1-Bromopropane
C. 1,1-dibromopropane
D. 1,2-Dibromopropane
Answer:
A. 2-Bromopropane
Explanation:
Propene is the second member of the alkene group with the chemical formula; C3H6. It reacts with hydrogen bromide (HBr), which is an acidic compound to form an alkylbromide.
In this reaction, the formation of a major product is in accordance with Markovnikov's rule, which emphasizes that hydrogen will be added to the carbon with more hydrogen. Hence, the bromide ion of HBr will be added to the second carbon atom of the alkene (propene), to form 2-bromopropane as a major product.
The reaction is as follows:
CH3CH=CH2 (propene) + HBr → CH3CHBrCH3 (2-bromopropane).
Calculate the mass of the zinc that reacts with 4.11 g of hydrochloric acid to form 9.1 g of zinc chloride and 3.97 g of hydrogen gas.
Answer: Mass of zinc that reacts with 4.11 g of hydrochloric acid to form 9.1 g of zinc chloride and 3.97 g of hydrogen gas is 8.96 g
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. Thus chemical equations are balanced.
[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
Given: mass of hydrochloric acid = 4.11 g
Mass of products = Mass of zinc chloride + mass of hydrogen = 9.1 g + 3.97 g = 13.07 g
As mass of reactant = mass of products
mass of hydrochloric acid + mass of zinc = Mass of zinc chloride + mass of hydrogen
4.11 g + mass of zinc = 13.07 g
mass of zinc = 8.96 g
From Bill Nye Germs video in the way cool scientist section, what career is the focus of this segment?
I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know
Select a statement which is NOT true about solubility.*
(1 Point)
a) Solubility of solids in liquids increases with temperature.
b) Solubility can be increased by using powdered sugar than sugar cube.
c) Solubility of gases decreases with decrease in temperature.
d) Solubility of solids are different in different solutions.
Ok
Answer:
I think it's b.
Explanation:
Because solubility increased by temperature.
Answer:
b) Solubility can be increased using sugar powder than sugar cube
i just had my chemistry lessons completed and we were revising solubility llol
Write a 4-7 sentence summary on the topic Radiation. (don't mind the orange color)
Answer:
pa brainliest answer po pa heart pa follow me and back
Explanation:
SUMMURY
Radiation is energy. It travels in the form of energy waves or high-speed particles. Radiation can occur naturally or be man-made. ... Ionizing radiation, which includes ultraviolet radiation, radon, x-rays, and gamma rays.
Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.
DIFFENITION :
radiation
1a: the action or process of radiating
b: the process of emitting radiant energy in the form of waves or particles
c(1): the combined processes of emission, transmission, and absorption of radiant energy
(2): the transfer of heat by radiation
— compare CONDUCTION, CONVECTION
2a: something that is radiated
b: energy radiated in the form of waves or particles
3: radial arrangement
4: ADAPTIVE RADIATION
Which statement describes why the viscosity of water is lower than that of
olive oil?
A. The molecules that make up water have more kinetic energy than
the molecules that make up olive oil.
B. The molecules that make up water can more easily slide past one
another than the molecules that make up olive oil.
C. The molecules that make up water have less kinetic energy than
the molecules that make up olive oil.
D. The molecules that make up water are larger than the molecules
Answer:
Option B. The molecules that make up water can more easily slide past one another than the molecules that make up a olive oil.
The molecules that make up water can more easily slide past one another than the molecules that make up olive oil. Hence, option B is correct.
What is viscosity?Viscosity is a term used to describe FLUIDS, which includes liquids and gases. Viscosity refers to the ability of a gas or liquid to resist flow.
Olive oil has a higher viscosity than water because it is a much larger molecule than water with larger dispersion forces.
Hence, option B is correct.
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PLEASE HELP i suck at chemistry ;(
Answer:
Explanation:
The Molar mass of Fe(Bro)2 = 167. 748 mol/g
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =3 to =1.
Answer:
[tex]1.936\times 10^{-18}\ \text{J}[/tex]
Explanation:
[tex]R_h[/tex] = Rydberg constant = [tex]2.178\times 10^{-18}\ \text{J}[/tex]
[tex]n_i[/tex] = Initial shell = 3
[tex]n_f[/tex] = Final shell = 1
We have the relation
[tex]\Delta E=R_h(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})\\\Rightarrow \Delta E=2.178\times 10^{-18}(\dfrac{1}{1^2}-\dfrac{1}{3^2})\\\Rightarrow \Delta E=1.936\times 10^{-18}\ \text{J}[/tex]
The energy of the photon emitted here is [tex]1.936\times 10^{-18}\ \text{J}[/tex].
Isotope what dose it mean
Answer:
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
"some elements have only one stable isotope"
Explanation:
2. When iron rusts what is it reacting with?
Carbon Dioxide
O
Salt
O Oxygen
O Chocolate
Answer:
The answer is oxygen
statement that accurately describes broadleaf trees??
Answer:thy have needle like leave
Explanation:
Answer:
dzfz d vfg
Explanation:
bnnbvmyjggbbdfg
What is a solution made of
Answer:
A solution is made when a substance called the solute "dissolves" into another substance called the solvent.
Explanation:
Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules.
What is the total number of joules required to freeze a 10 g sample of water at 0°C?
show work if possible and will give brainliest
Explanation:
the answer will be 98.4 kJ
As per concept of enthalpy of fusion , 98,397 joules of energy are required to freeze 10 g of water at 0°C.
What is enthalpy of fusion?Enthalpy of fusion is defined as the enthalpy change which results from when a substance changes its state from solid to a liquid at a constant pressure.Heat of solidification is opposite of enthalpy of fusion.During fusion there is a phase transition which takes place, from liquid to solid.
The temperature at which the fusion takes place is called as the fusion temperature. This enthalpy is accompanied without any change in temperature.
Enthalpy of fusion of water=333.55 J/g . This value is for 1 g of water as per definition,hence for 10 g water enthalpy of fusion is 10×333.55=3335.5 J.
Hence, 3335.5 joules are required for freezing 10 g sample.
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True or false.
“Sleeping does not give us energy, but is important because it helps us repair wounds; think better, grow and survive.”
hurry pls pls plsss
Answer:
False
Explanation:
9. Carbon-14 has a half-life of 5,730 years. How many years have passed after 3
half-lives?
Answer:
120 gram sample of a radioactive element, how many grams of that element will be left after 3 half-lives have passed? If you have a 300
Explanation:
Hope this helps!
can someone help please?
Answer:
Genetic Factors: Bad tasting leaves, plant structure, types of stems, reproduction
Environmental: insects, pollution, terrain, soil conditions, pH of soil, fire, flood, heat wave, temperature, lack of air, drought,
Explanation:
Genetic factors are within the organism, the plant's own make-up. Environmental factors are conditions on the outside, in the soil, the atmosphere, and other organisms in the habitat.
Chromosomes _____. (Choose all that apply)
1.) Are tightly coiled bundles of DNA
2.) Carry many genes
3.) Are found inside the nucleus of eukaryote
4.) Can be used to diagnose genetic disorders
5.) Outnumber genes in a cell
Answer:
1.) Are tightly coiled bundles of DNA
2.) Carry many genes
3.) Are found inside the nucleus of eukaryote
4.) Can be used to diagnose genetic disorders
Explanation:
A chromosome is a thread-like structure made up of DNA. The chromosomes are made of DNA which are tightly coiled around protein.
Chromosomes carry hundreds and thousands of genes. The number of genes in a cell outnumbers the number of chromosomes.
In eukaryotic cells, all the chromosomes are found inside the nucleus of eukaryote.
The chromosomes and DNA can be examined so as to diagnose genetic disorders.
Need help with question 3!
*please answer correctly*
A student increases the temperature of a 300cm3 balloon from 40°C to 110°C.
What will the new volume of the balloon be? Round your answer to one decimal point.
(To convert Celsius to kelvin, add 273.15)
Thank you!!!
Answer:
[tex]V_2=367.06\ cm^3[/tex]
Explanation:
Charles law states that volume of the gas is directly proportional to the temperature i.e.
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
We ave,
V₁ = 300 cm³
T₁ = 40°C = 40 + 273.15 = 313.15 K
T₂ = 110°C = 110 + 273.15 = 383.15 K
Let V₂ be the new volume.
[tex]V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{300\times 383.15 }{313.15}\\\\V_2=367.06\ cm^3[/tex]
So, the new volume of the balloon is [tex]367.06\ cm^3[/tex].
what will happen if you increase the electric current is flowing through an electro magnet
Answer:see below
Explanation: The magnetic field will strengthen and the magnet will get warmer (resistance effect)
When a negatively charged beta particle is emitted by a radioactive nucleus which change happens in the nucleus?
a. The number of protons increased by one
B. The number of neutrons increased by one
C. The number of nucleons increased by one
D. The number of nucleons decreased by one
Answer:
d
Explanation:
its d because a beta particle has a negative charge
In the case when there is the negatively charged beta particle so the number of nucleons decreased by one.
What are nucleons?In terms of chemistry and physics, a nucleon could be treated as the proton or neutron also it considered as the component of the atomic nucleus. Here the no of nucleons in the nucleus should represent the atom mass number.
So based on this, we can conclude that In the case when there is the negatively charged beta particle so the number of nucleons decreased by one.
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What is the word equation for the decomposition of hydrogen peroxide
Answer:
2H2O2 --> 2H2O + O2
Explanation:
We know that hydrogen peroxide is H2O2
Decomposition means that you break down so break down H2O2
H2O2 --> H2O + O2
There are three oxygens so we have to balance
2H2O2 --> 2H2O + O2
Which substance can form a coordinate covalent bond with a hydrogen ion?
a. H2
b. He
c. NH3
d. CH4
The substance can form a coordinate covalent bond with a hydrogen ion is He. Hence, option B is correct.
What is covalent bond ?An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs.
Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.
Covalent bonds were first described in 1939. The word "covalent bond" is derived from the prefix co-, which means jointly, associated in action, partnered to a lesser extent, etc. The hydrogen atoms share the two electrons through covalent bonding since the prefix co- implies jointly, associated in action, etc.
Thus, option B is correct.
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How many moles of each element are in one mole of (NH4)2S? (3 points)
a
1 mole of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
b
1 mole of nitrogen, 6 moles of hydrogen, 1 mole of sulfur
c
2 moles of nitrogen, 6 moles of hydrogen, 1 mole of sulfur
d
2 moles of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
Answer:
2 moles of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
Explanation: i took the test and got it right
The number of moles for each element in one mole of (NH₄)₂S are:
d. 2 moles of nitrogen, 8 moles of hydrogen, 1 mole of sulfur
Identification of number of moles:The number of moles can be identified by dividing the given mass by molar mass.
In one mole of (NH₄)₂S there are moles of each participating element i.e. nitrogen, oxygen, hydrogen, and sulfur.
In this molecule, there are 2 moles of nitrogen, 8 moles of hydrogen, and one mole of sulfur.
Thus, option d is correct.
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____CH4 +___O2 ->
____H3N+____O2->
Explanation:
CH4 + 2 O2 -> CO2 +2 H2O
4 H3N+3 O2 -> 6H2O + 2 N2
21.Electromagnetic radiation can take the form of which of the following types of waves
a.Heat
b.Light
c.Ultraviolet
d.All of the above
What mass of potassium chloride, KCl, is produced when 12.6 g of oxygen, 02, is produced?
Mass of KCl= 19.57 g
Further explanationGiven
12.6 g of Oxygen
Required
mass of KCl
Solution
Reaction
2KClO3 ⇒ 2KCl + 3O2
mol O2 :
= mass : MW
= 12.6 : 32 g/mol
= 0.39375
From the equation, mol KCl :
= 2/3 x mol O2
= 2/3 x 0.39375
=0.2625
Mass KCl :
= mol x MW
= 0.2625 x 74,5513 g/mol
= 19.57 g
_____
particles are very small compared to the large
amounts of empty space in the container.
Answer:
Gas
Explanation:
The question is asking solid, liquid or gas. Gas particles are the smallest.
Please help...Thank so much!!
Answer:
what????????????????????
Answer:
1. ?
Explanation:
I'm not really sure, but knowing that gas particles are constantly moving makes me think that an ideal gas sample would have constantly moving particles. also with 2., gas has a lot of energy and their particles rarely come into contact with each other (they're even thought of as more independent than as one substance); with 3., there isn't much of a force between gas particles, which is why they're able to stay in that state of matter; and with 4., well, volume is important lol.
But the kinetic molecular theory states that games are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion, so I'm sticking with the answer being number 1.
Photochemical isomerization of (E,E)-2,4-hexadiene to (Z,E)-2,4-hexadiene is a two-step process in which a photochemically driven intermediate forms and then thermally rearranges to give the product. Draw the structure of this intermediate, using wedge-and-dash bonds to denote the appropriate stereochemistry.
Answer:
Its response to this question is as follows:
Explanation:
Please find in the attachment file the complete query and the answer file.
< Question 3 of 25
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What is the pressure of the gas in this mercury manometer
if h = 85 mm and atmospheric pressure is 755 mmHg?
pressure:
mmHg
Answer:
360mmHg is the correct answer in its units