the answer is Cr in Cr2O7.
Explanation:
it's oxidation number is +7 in the compound
while Fe has +3 and P has +6 in their respective compounds
The oxidation state is the gained or lost electrons by an atom to create a chemical bonding. Chromium (Cr) in Cr₂O₂⁻⁷ has the highest oxidation state. Thus, option C is correct.
What is an oxidation state?Oxidation is the representation of the electrons that are lost and gained by an element in a molecule or compound to establish a chemical bond. The oxidation number of free elements is always zero, and hydrogen is usually +1.
The oxidation state of P in H₂PO⁻₄ is given as,
2 (1) + P + 4(-2) = -1
P = + 5
The oxidation number of Fe in Fe₂O₃ is given as,
2Fe + 3O = 0
2Fe + 3(-2) = 0
Fe = + 3
The oxidation number of Cr in Cr₂O₂⁻⁷ is given as,
2Cr + 7O = -2
2Cr + 7(-2) = -2
Cr = + 6
Therefore, chromium (+6) in Cr₂O₂⁻⁷ has the highest oxidation state.
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Which term best describes Cl in the following reaction? (HELP ASAP)
2NH3 + (OCl)– → N2H4 + H2O + Cl–
A)
Reducing agent
B)
Oxidized
C)
Reduced
D)
Electrolyte
i'm thinking reduced maybe but not sure
Answer:
Yes it is reduced because ocl is the reducing agent
Below is a diagram showing the chemical energy (Ech) for the formation of water. Is the reaction exothermic or endothermic?
Answer: exothermic
Explanation: chemical reactions that release energy is called exothermic, and in this case, more energy is being released. (I THINK)
The reaction shown in the picture is exothermic reaction.
What is exothermic reaction?The exothermic reaction leads to the release of energy. This energy is often higher than the combined energy of the reactants.
It can be understood that the net amount of energy required to initiate an exothermic reaction is less than the net amount of energy released by the reaction. When a calorimeter, a device used to measure the heat released by a chemical reaction, the net amount of heat energy that flows through the device is equal to the negative of the total energy change of the system.
In the picture, first reactants had high energy and after the formation of the product the energy decreases.
The nuclear fission of one atom of uranium-235 releases more than 2.5 million times the energy that is produced from the combustion of coal.
The fission of one atom can cause a chain reaction in which the neutron from the fission of one uranium-235 atom can strike another atom, leading to its nuclear fission.
Therefore, The reaction shown in the picture is exothermic reaction.
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Explain if the combination of iron and copper sulfate is an example of a chemical reaction. Use evidence and scientific reasoning to support your answer.
How many grams H2 are needed to react with 2.80 g of N2?
Answer:
N2 +3 H2 → 2 NH3
so we have 2180 g of N2
or 2.80 g ÷ 28.02 g/mol = 0.100 mol
1 mol of N2 react with 3 moles of H2
Therefore 0.100 mol of N2 react with 0.3 moles of H2
0.300 mol X Molar mass (2.00 g/mol) = 0.600 g
0.600 g of H[tex]_2[/tex] are needed to react with 2.80 g of N[tex]_2[/tex]. Mole is one of the International System for Units' seven foundation units (SI).
What is mole?A mole is just a measuring scale. In reality, it is one of the International System for Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. Using absolute amounts of atoms, molecules, or ions would be problematic as well since chemical reactions frequently occur at levels that use grams would be inappropriate.
A mole consists of precisely 6.022140761023 particles. The "particles" might be anything, from tiny things like electrons and atoms to enormous things like stars or elephants.
N[tex]_2[/tex] +3 H[tex]_2[/tex] → 2 NH[tex]_3[/tex]
2.80 g ÷ 28.02 g/mol = 0.100 mol of N[tex]_2[/tex]
1 mol of N[tex]_2[/tex] react with 3 moles of H[tex]_2[/tex]
0.100 mol of N[tex]_2[/tex] react with 0.3 moles of H[tex]_2[/tex]
0.300 mol X Molar mass (2.00 g/mol) = 0.600 g of H[tex]_2[/tex]
Therefore, 0.600 g of H[tex]_2[/tex] are needed to react with 2.80 g of N[tex]_2[/tex].
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HELP PLS AND THANK U FAST PLS <3
Answer:
dragon fly larvae, beetles, fish, pelican
Explanation:
Which solution has the highest electrical conductivity? Explain why.
a) 0.1 M of H2S
b) 0.1 M of HNO2
c) 0.1 M of H2SO3
d) 0.1 M of NH4Cl
Answer:
Given solutions are:
a) 0.1 M of H2S
b) 0.1 M of HNO2
c) 0.1 M of H2SO3
d) 0.1 M of NH4Cl
Explanation:
The electrical conductivity of a solution is directly proportional to the number of ions present in it.
All the given solutions have the same concentration.
But on dissociation, each solution produces a different number of ions as shown below:
[tex]H{2} S ->HS^{-}+H^{+}[/tex]
2 ions per molecule.
[tex]HNO{2} -> H^{+} + NO{2}^{-}[/tex]
2 ions per molecule.
[tex]H2SO3 -> 2H^{+} +SO{3} ^{2-}[/tex]
3 ions per molecule.
[tex]NH{4}Cl -> NH{4}^{+} + Cl^{-}[/tex]
2 ions per molecule.
Answer:
0.1M H2SO3 has high electrical conductivity.
What does fr stand for on the periodic table
Answer:
"Francium"
Explanation:
"Francium" is a chemical element with the symbol "Fr" and the atomic number "87". Classified as an "alkali metal", Francium is a solid at room temperature.
Atomic Mass: "223.01973u"
Year Discovered: "1939"
what is the hardest metal?
1. Cesium
2. Titanium
3. Chromium
4. Magnesium
Quickly please!
Answer:
i believe it is titanium.
Explanation:
Answer:
2. Chromium
Explanation:
what pressure must be applied to compress a gas from 85 L at 3.5 atm to 15 L? a-17.3atm b-24.7atm c-19.8atm d-21.4atm
If 26.4 g of hydrogen, H2, is produced from 100.0 g of methane, CH4, reacting with excess water as shown, what is the percentage yield? CH4(g) + H2O(g) → CO(g) + 3H2(g)
Answer: Percent yield represents the ratio between what is experimentally obtained and what is theoretically calculated, multiplied by 100%.
% yield
=
actual yield
theoretical yield
⋅
100
%
So, let's say you want to do an experiment in the lab. You want to measure how much water is produced when 12.0 g of glucose (
C
6
H
12
O
6
) is burned with enough oxygen.
C
6
H
12
O
6
+
6
O
2
→
6
C
O
2
+
6
H
2
O
Since you have a
1
:
6
mole ratio between glucose and water, you can determine how much water you would get by
12.0
g glucose
⋅
1 mole glucose
180.0 g
⋅
6 moles of water
1 mole glucose
⋅
18.0 g
1 mole water
=
7.20
g
This represents your theoretical yield. If the percent yield is 100%, the actual yield will be equal to the theoretical yield. However, after you do the experiment you discover that only 6.50 g of water were produced.
Since less than what was calculated was actually produced, it means that the reaction's percent yield must be smaller than 100%. This is confirmed by
% yield
=
6.50 g
7.20 g
⋅
100
%
=
90.3
%
You can backtrack from here and find out how much glucose reacted
65.0 g of water
⋅
1 mole
18.0 g
⋅
1 mole glucose
6 moles water
⋅
180.0 g
1 mole glucose
=
10.8
g
So not all the glucose reacted, which means that oxygen was not sufficient for the reaction - it acted as a limiting reagent.
Explanation:
What volume will 8.47 kg of sulfur dioxide gas occupy at a pressure of 89.4 kPa and a temperature
of 40.0 °C?
Answer:
let me know if it is right:)
and I hope it make sense
What is the concentration of a solution containing 0.32 moles of NaCl in 3.4 liters?
Answer:
To get the molarity we need to divide the number of moles of NaCl by the volume of the solution. So, 0.32 moles NaCl divided by 3.4 L, and that gives 0.094 M NaCl.
What is the hydrogen ion concentration of 0.450M solution of acetic acid (HC2H3O2), if the ionization constant(Ka) is 2.19 x 10-5?
Answer:
3.02 Mm
Explanation:
200 + O2 → 2CO2
How many moles of CO2 of carbon dioxide are produced from 10 moles of carbon monoxide (CO)?
ANSWER 10 MOLES OF CARBON DIOXIDE
2C0 + O2 → 2CO2
2 moles of carbon monoxide forming 2 moles of carbon dioxide
10 moles of carbon monoxide will form 10 moles of carbon dioxide
What is the product of the unbalanced combustion reaction below?
C4H10(g) + O2(g) →
A. C(s) + H2O(9)
B. C6H1206(s)
C. CO2(g) + H20(9)
D. CO2(g) + H2(9)
Answer:
C
Explanation:
because it is complete combustion so it will produced CO2 +H2O :)
what Element has a -4 oxidation number.
What is the strongest force that exists between molecules of nitrogen
monoxide (NO)?
Answer:
Hydrogen Bonding (H-Bonding)
Someone help me am i right or wrong
Answer:
You right!
Explanation:
Answer: Yes your right
a gas mixture containing hydrogen, oxygen, and nitrogen has a total pressure of 840 torr. if p hydrogen = 320 torr and p oxygen = 485 torr, what is the partial pressure of nitrogen in the mixture? please help
Answer
35 torr
Explanation:
The mixture contains 320 torr of hydrogen, 485 torr of oxygen, a total pressure of 840 torr, so you need to find the leftover
320(hydrogen) + 485(oxygen) = 805 torr
840(total) - 805 = 35 torr
How does the number of reactants in a decomposition reaction compare with
the number of products?
A. The number of reactants may be greater than or less than the
number of products.
B. The number of reactants is the same as the number of products.
C. The number of reactants is less than the number of products.
D. The number of reactants is greater than the number of products.
The number of reactants is less than the number of products in a decomposition reaction.
What is a Decomposition reaction?This is the type of chemical reaction which involves a reactant being broken down into two or more products.
This means the number of product is always greater than the reactant which is why option C was chosen.
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What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of bromine? Hint - consider the mass of both atoms of bromine in your calculation. A.43% B.87% C.13% D.63%
what would be the formula for ethane?
Answer:
C₂H₆
Explanation:
The formula for ethane is C₂H₆
can someone please solve it?
Answer:
So They want you to tick the Correct Option corresponding to each Reaction.
The answers are below. So Tick correctly!
The first is a SINGLE REPLACEMENT REACTION.
The second is a COMBUSTION REACTION.
The third is a DOUBLE REPLACEMENT REACTION.
The fourth is a SYNTHESIS REACTION. Examples are C + O2 = CO2, CaO + H2O = Ca(OH)2.
The fifth is a DECOMPOSITION REACTION. Another example is CaCO3 === CaO + CO2
The sixth is also a DOUBLE REPLACEMENT REACTION.
Which characteristic of water helps it form droplets? (5 points)
A. Low specific heat
B. Nonpolar structure
C. High surface tension
D. Ability to dissolve substances
Answer:
Surface tension causes water to form spherical droplets and allows it to support small objects, like a scrap of paper or a needle, if they are placed carefully on its surface.
>3
High surface tension is the characteristic of water which helps it form droplets.
What is Cohesion of water ?It is the attractive force between the water molecules. Cohesion is the property of water that explains that how water molecules interact with each other that means water likes to stick to itself.
Now lets check all options one by one:
Option (A): Low specific heat
Water has high specific heat due to the hydrogen bonding.
So, it is incorrect option.
Option (B): Non polar structure
Water molecule is polar covalent molecule because of its shape. The shape of the water molecule is bent.
So, it is incorrect option.
Option (C): High surface tension
Stronger the cohesion force then stronger the surface tension. It is responsible for the shape of the liquid droplets.
So, it is correct option.
Option (D): Ability to dissolve substance
It has ability to form hydrogen bond which makes an water a good solvent. Water is universal solvent.
So, it is incorrect option.
Thus, from above conclusion we can say that High surface tension is the characteristic of water which helps it form droplets.
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Pls answer ill give brainliest question in picture
Answer: A & D
Explanation:
The two main forces are temperature and salinity.
how are molarity and volume related
these are the options
A They are directly related.
B They are inversely related.
C They are different units of dilution.
D They are different units of concentration.
Answer:
Molarity can be used to calculate the volume of solvent or the amount of solute. The relationship between two solutions with the same amount of moles of solute can be represented by the formula c1V1 = c2V2, where c is concentration and V is volume.
The relationship between Molarity and volume of a solution is : ( B ) They are inversely related
What is molarity ?Molarity is the number of moles of solute in unit of volume of the solution ( usually per liter ). Molarity is calculated by dividing the number of moles of a solute ( n ) by the volume of the solution.
Molarity = n / v .
Therefore we can conclude that the relationship between Molarity and volume is that they are inversely related.
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What is 25 Ml into L
Answer:
0.025 liters
Explanation:
divide 25 into 1000
Answer:
25 mL = 0.025 L
Explanation:
edge 2023
What is the state symbol of oxygen at room temperature
Answer: Oxygen is a gas at room temperature.
Name the following ether: CHCH2OCH3
A. Diethyl ether B. Propanol
C. Dimethyl ether C. Ethyl Methyl Ether
Answer:
ethyl methyl ether
Explanation:
when naming ethers name the alkyl rings, in this case we have methyl and ethyl( make sure they are in alphabetical order) followed by the word ether, so it becomes ethyl methyl ether
Si se sabe que el bronce se forma con 60% de cobre y 40% de estaño¿cual sera la masa de cobre contenida en 200 gramos de bronce
Answer:
Mass of copper in 200 g bronze is 120 g.
Explanation:
If it is known that bronze is formed with 60% copper and 40% tin, what will be the mass of copper contained in 200 grams of bronze?
Percentage of copper in bronze = 60 %
Percentage of tin in bronze = 40 %
Mass of bronze = 200 grams
Mass of copper in bronze = 60 % of 200 g
= 0.6 x 200 = 120 grams
Mass of copper in 200 g bronze is 120 g.