balance the following equation in basic solution using the lowest possible integers and give the coefficient of water. cr3 (aq) mno2(s) → mn2 (aq) cro42-(aq)
Answers
The balanced equation in basic solution is 3 Cr³⁺ + 4 MnO₂ + 8 OH⁻ → 4 Mn²⁺ + 3 CrO₄²⁻ + 4 H₂O. The coefficient of water (H₂O) is 4.
To balance the given equation in basic solution, we need to ensure that both the charges and the number of atoms are balanced on both sides.
Starting with the chromium ions (Cr³⁺), we balance the charges by adding three hydroxide ions (OH⁻) to the product side. Next, we balance the manganese dioxide (MnO₂) by adding four manganese ions (Mn²⁺).
Finally, to balance the chromate ions (CrO₄²⁻), we add three more hydroxide ions to the reactant side. The resulting balanced equation is:
3 Cr³⁺(aq) + 4 MnO₂(s) + 8 OH⁻(aq) → 4 Mn²⁺(aq) + 3 CrO₄²⁻(aq) + 4 H₂O(l)
In this balanced equation, the coefficient of water (H₂O) is 4.
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Related Questions
Which colligative property is employed when coolant is added to a car's radiator to keep it from overheating?
A)boiling point elevation
B)vapor-pressure lowering
C)freezing-point depression
Answers
Answer:
boiling-point elevation
Explanation:
Answer:
boiling-point elevation
Explanation:
Although I am in the middle of the 5 stages, I am just as important
as the first and the last. As soon as you see a leaf sprout, you are
sure to be in my stage. Who am I?
This is annoying
Answers
Answer: The final stage of the life cycle of a tree is when it has fully grown and reached the ... You should be confident in your supplier's approach to sustainability. ... This is the first occasion you will see a stem and perhaps a couple of leaves. ... The next phase is the sapling stage, this is when the sprout continues to grow and has ...
Explanation:
why do water molecules have a stronger attraction than helium?
answer needed before 3:00 June 2nd 2023
Answers
Water molecules have a stronger attraction than helium due to the presence of dipole-dipole interactions resulting from the polarity of the water molecule.
Water molecules have a stronger attraction than helium due to the difference in their intermolecular forces. Intermolecular forces are the attractive forces that exist between molecules and play a crucial role in determining the physical properties of substances.
Water molecules have a polar nature, meaning they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom.
This polarity arises from the unequal sharing of electrons in the O-H bonds due to oxygen's higher electronegativity compared to hydrogen. The presence of polar bonds within the water molecule gives rise to a dipole-dipole interaction.
In contrast, helium is a noble gas and exists as individual atoms. Helium atoms are electrically neutral and do not possess a permanent dipole moment.
As a result, helium exhibits weak intermolecular forces known as London dispersion forces or Van der Waals forces. These forces arise due to temporary fluctuations in electron distribution, causing temporary dipoles that induce dipoles in neighboring atoms or molecules.
The dipole-dipole interaction in water is stronger than the London dispersion forces in helium. This is because dipole-dipole forces are more significant when there are permanent dipoles in the molecules.
The stronger attraction between water molecules leads to higher boiling and melting points compared to helium.
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which of these liquids is the least acidic?
Answers
Answer:
The answer is lemonade.
Weaker acids are those which tend to have a higher pH from 4 to at least 6 stronger acids have low pH from 2 and below that's from 2 to 0.
Hope this helps
Hope
Science question: Which beat summarized the scientific process that led to our current understanding of DNA?
1 each scientist made an important but unrelated contribution
2. Scientists built on the previous work of other scientists to make new discoveries
3 and 4 are too long
Answers
Answer:
2
Explanation:
in terms of cells, it exists from previous existing cells, that means scientist are built up by the work of other scientist
Answer:
the answer is B
Explanation:
Bleach boils at 101°C. Isopropyl alcohol (rubbing alcohol) boils at 82.5°C. Vinegar boils at 100.6°C. Water boils at 100°C. A student has an unknown clear liquid. She wants to determine what it is, so she decides to boil the liquid and use the boiling point as a means of identification. The liquid starts boiling at 99°C. Based on the boiling points shown, which substance is it?
Answers
Answer:
most likely water
Explanation:
most likely it is water, however pressure plays a role, if you are at sea level the boiling point of water is 100°C but if you are on Mt. Everest it is 71°C, assuming she is slightly above sea level it is water.
HELP true or false: if all the bonds in a molecule are polar the molecule is a polar molecule
Answers
The given statement is False.
Not all molecules having polar bonds are polar. An example is linear carbon dioxide molecule (CO 2). The individual C−O bonds are polar but the molecule on the whole is non polar as individual bond dipoles cancel each other. Another example is boron trifluoride (BF 3) molecule with triangular planar geometry. Another example is carbon tetrachloride (CCl4) with tetrahedral geometry.
Lana drew the diagram below to model asexual reproduction. Based on Lana's diagram, which statement explains the results of asexual reproduction? A. The offspring are not genetically identical to the parent, because each offspring receives only half of the chromosomes from a single parent. B. The offspring are not genetically identical to the parents, because two parents each contribute half of their chromosomes to each offspring. C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes. D. The offspring are genetically identical to the parents, because two parents each contribute a complete copy of their chromosomes to each offspring.
Answers
Based on Lana's diagram, the correct statement that explains the results of asexual reproduction is C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes.
What happens in asexual reproduction?In the diagram, the parent cell divides into two identical daughter cells, each of which contains a complete copy of the parent cell's genetic material.
This type of reproduction, where a single parent produces offspring that are genetically identical to itself, is called asexual reproduction. It is the process by which many unicellular organisms, such as bacteria and some protists, reproduce.
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How does heat enhance the rate of chemical reaction? Explain in short.
Answers
Answer: the heat is rapidly changing
Explanation: as the heat continues to rapidly change so does the chemical as it also starts to change, so in a way you could use the example of a skateboard moving. This is because theres also friction in the skateboard which is made from the two things moving together and the heat is slowly increasing causing a reaction to the skateboard wheels so in a way it can cause more rapid changes
With the increase in heat or temperature, the rate of reaction will increase as more molcules will get kinetic energy for effective collisions.
What is the rate of the chemical reaction?The rate of reaction can be d as defined the speed at which the products are fromed from the reactants. The rate of a reaction provides information on how much time under which a chemical reaction can be completed.
The rate of a chemical reaction can be defined as the speed of the conversion of the reactants into products with time. Some reactions are instantaneous, while some chemical reactions take time to achieve the final equilibrium.
In some reactions, a catalyst can be used to increase the rate of the reaction. The catalyst provides the speed to the reaction in both forward and backward reactions by lowering the activation energy.
The pressure of the gaseous reactants increases, and the concentration of gases results in an increase in the rate of reaction. With an increase in the temperature, the average kinetic energy of the reactant molcules will be raised.
Therefore, more molecules will go under effective collisions. Therefore, the rate of reaction will be increased.
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this is my last 100 points so enchiladas or chilaquiles.
Answers
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Thank u soo much...
In the game of football sometimes we while looking at the football and trying to kick it with a greater force, collides with a player of opposite team. both feel hurt because each applies a force to other . When a gun is fired it exerts a forward force on the bullet .
which statements are true about the representation of enthalpy for a thermochemical equation? select all that apply. a. on the product side, it is an exothermic reaction. b. on the reactant side, it is an exothermic reaction. c. on the product side, it is an endothermic reaction. d. on the reactant side, it is an endothermic reaction.
Answers
a. on the product side, it is an exothermic reaction.
c. on the reactant side, it is an endothermic reaction.
in this short synthetic sequence, provide the organic structures of the missing reactant and the missing product.
Answers
The first step of the reaction, we have reaction between a nucleophile and an electrophile.
We can see that in the first step of the reaction, we have reaction between a nucleophile and an electrophile. In this case, the electrophile would have to be an alkyl halide which produces a carbocation as show in the image attached. What we have here is quite similar or like most of the organic reactions, this reaction occurs in a number of detailed or smaller steps and each step of the reaction is going to help to bring us closer to the end product of the entire steps of the reaction which is wat we target as we carry out the particular reaction.The second step involves the reduction of the alkyne with the use of a Lindlar catalyst. As such the reaction is poisoned and it stops at the alkyne stage rather than going on to obtain the alkane.
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Bobby is at a family reunion and
would like to know what the median
age is, of everyone present. Here
are the ages of everyone at his
reunion:
35, 2, 7, 33, 25, 70, 75, 40, 42, 12,
15, 7, 44, 20, 25, 3, 65, 62
What is the median?
Answers
Answer:
Median is 29.
Explanation:
add all them up and divide them
Which of the following represents the equation for a zero-order half-life? A) + 1/2 - BA1 B)t1/2 = 0,023 C)1/2 FAK D)+1/2 - Flo E) t1/2 T.
Answers
None of the given options represents the equation for a zero-order half-life.The equation for zero-order half-life is:t1/2 = [A]0/2k the correct answer to the question is none of the given options.
The zero-order half-life is the time required for the concentration of a reactant to decrease by half in a zero-order reaction. In a zero-order reaction, the rate of the reaction is constant and independent of the concentration of the reactant.This equation shows that the half-life of a zero-order reaction is directly proportional to the initial concentration of the reactant and inversely proportional to the rate constant. This means that a higher initial concentration of the reactant or a lower rate constant will result in a longer half-life. In contrast, a lower initial concentration of the reactant or a higher rate constant will result in a shorter half-life.
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Charli is boiling a pot of water as she prepares dinner. The temperature at which the water boils can be explained by the external
pressure and
A
the amount of heat that is added to the pot of water.
B. the volume of the sample of water being heated.
C. the rate at which heat is added to the pot of water.
D
the strength of attractive forces among the water molecules.
PLEASE ANSWER QUICKLY THIS IS DUE IN 5 MINS!!
Answers
Answer:
ya tu sabes cómo se los aseguro
can someone help with with some answers?! :-) please! i need this done in a hour :-( help!!
Answers
1. A student in lab measures 4.6 grams of copper for an experiment. Upon further analysis he determines that he should have measured out 4.7 grams of copper. What is his percent error?
Answers
Answer:
\(2.13\%\)
Explanation:
Quantity of copper measured by a student = 4.6 grams
Original quantity of copper = 4.7 grams
Error in measurement = Original quantity of copper - Quantity of copper measured by a student \(=4.7-4.6=0.1\) grams
To find the percent error, apply the following formula:
Percent error = (Error in measurement / Original quantity of copper) × 100
\(=\frac{0.1}{4.7}(100)=2.13\%\)
aqueous hydrobromic acid hbr reacts with solid sodium hydroxide naoh to produce aqueous sodium bromide nabr and liquid water h2o. what is the theoretical yield of sodium bromide formed from the reaction of 1.6g of hydrobromic acid and 0.20g of sodium hydroxide? be sure your answer has the correct number of significant digits in it. g
Answers
The theoretical yield of sodium bromide formed from the reaction of 1.6 g of hydrobromic acid and 0.20 g of sodium hydroxide is 2.04 g.
The theoretical yield of sodium bromide is calculated by the equation: mass of sodium bromide = (moles of hydrobromic acid) x (molar mass of sodium bromide). First, you need to calculate the moles of hydrobromic acid. This can be done by dividing the mass of hydrobromic acid (1.6 g) by the molar mass of hydrobromic acid (80.91 g/mol):
Second, you need to calculate the moles of sodium hydroxide. This can be done by dividing the mass of sodium hydroxide (0.20 g) by the molar mass of sodium hydroxide (39.99 g/mol):
Moles of sodium hydroxide = 0.20 g / 39.99 g/mol = 0.005 moles.
Moles of hydrobromic acid = 1.6 g / 80.91 g/mol = 0.0198 moles.
Finally, the theoretical yield of sodium bromide can be calculated by multiplying the moles of hydrobromic acid (0.0198 moles) by the molar mass of sodium bromide (102.89 g/mol):
Theoretical yield of sodium bromide = 0.0198 moles x 102.89 g/mol = 2.04 g.
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2. Apply Concepts Fill in the blank spaces in the table below. Then, use the information in the table to answer questions 3 and 4. Atomic number E B D A C Atom 7 4 13 98 38 Mass number 14 15 27 87 22 Number of neutrons 8 14 50 49 Identify Which two atoms in the table are isotopes of the same element? Explain your answer.
Answers
(A) Number of neutrons = 7, (B) Atomic Number = 8, (C) Mass number = 27, (D) Atomic number = 38, (E) Mass number = 86
D and E are the isotopes of the same element.
What are isotopes?Isotopes are variants of a chemical element that have the same number of protons in their atomic nucleus but differ in the number of neutrons. This means that isotopes of the same element have the same atomic number (which determines the element's chemical properties) but different atomic masses.
For example, the element carbon has three isotopes: carbon-12, carbon-13, and carbon-14, which have 6, 7, and 8 neutrons, respectively. Isotopes of an element behave similarly in chemical reactions, but their physical properties, such as density and melting point, may be different due to the differences in atomic mass. Isotopes are commonly used in various applications such as radiometric dating, isotopic labeling in biological research, and nuclear energy production.
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An electron cannot have the quantum numbers n = ________, l = ________, ml = ________.
A) 2, 0, 0
B) 2, 1, -1
C) 3, 1, -1
D) 1, 1, 1
E) 3, 2, 1
Answers
An electron cannot have the quantum numbers n = 1, l = 1, and ml = 1. Therefore, option (D) is correct.
What are the quantum numbers?The set of numbers that can describe the position and energy of a particular electron are known as quantum numbers. Four quantum numbers are principal quantum numbers, azimuthal, magnetic, and spin quantum numbers.
Principal quantum numbers (n) can designate the principal electron shell and the most probable distance between electrons and the nucleus. The azimuthal quantum number (l) can designate the shape of an orbital and has a value equal to n -1.
The magnetic quantum number can designate the total number of orbitals in a particular subshell and the orientation of orbitals. It has value -l to l.
Therefore, n = 1 then l = 0, and ml = 0 as well.
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Select the correct image.
The image shows the embryonic development of four different types of vertebrates. Which developmental path is most likely that of a lizard?
Answers
Answer:
what image?????
Explanation:
?
Answer:
2nd image/ image B
Given the empirical formula of your compound is CH₂, what is the gram formula mass of the empirical formula?
Answers
Answer:
14g
Explanation:
The empirical formula of the compound is CH₂ ;
When we are dealing with compounds the gram formula mass or gram - molecular weight is the molar mass of the compound.
It is determined by adding the atomic masses of the components together and then expressed in grams.
Atomic mass of C = 12
Atomic mass of H = 1
Gram formula mass = 12 + 2(1) = 14g
please help this is urgent
Answers
The ratio of the resistance of wires Y and X is 2:1
What is resistance?Resistance in an electrical circuit is used to calculate the current flow. The symbol for the ohm, a unit of measurement for resistance, is omega. The unit of resistance is named after German physicist Georg Simon Ohm, who looked into the relationship between voltage, current, and resistance. He is credited for creating Ohm's Law.
To ascertain the state of a component or circuit, resistance measurements are frequently made.
Since resistance is independent of length, it stays constant. The term resistivity itself refers to the material's resistance per unit length and unit area.
While the resistance depends on the length
R₁=ρL/A
R₂=ρ2L/A
R₂=2ρL/A
R₂=2R₁
Thus, the resistance of a second wire is twice that of a first wire.
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If we add 150mL of ammonia to 150mL of water, what is the concentration by volume?
Answers
Answer:
buffer solution
Explanation:
What is the difference between heat of formation and heat of reaction? Give examples and units
Answers
Answer:
The main difference between the heat of formation and heat of reaction is that heat of formation is the amount of energy either absorbed or released during the formation of a compound whereas heat of reaction is the amount of energy either absorbed or released during any chemical reaction.
at 25 C, 1.00 mole of O2 gas was found to occcupya volume of 12.5 L at a pressure of 198 kPa. What is the value of gas constant in L•kPa/ mol•K
Answers
Answer:
8.3
Explanation:
Based on the balanced chemical equation for reaction 5 what compounds were being removed when the recovered copper product was washed repeatedly with water?.
Answers
Based on the balanced chemical equation for reaction 5 aluminum III ion and copper II sulphate compounds were being removed when the recovered copper product was washed repeatedly with water
A chemical equation consist of reactant product and an arrow showing the direction of reaction and the equation in which number of atom of all the molecules is equal on both side of the equation is known as balanced chemical equation and when recovered copper product was washed repeatedly with water the compound removed during those washes were aluminum II ion and copper II sulphate
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HELP ASAP plz!:) I’ll give brainliest
Answers
Answer:
it is closer to the south pole
Explanation:
If an object has a mass of 8 and a volume of 32cm3 hat is the density?
Answers
Answer:
The answer is 0.25 g/cm³Explanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume} \\ \)
We have
\(density = \frac{8}{32} = \frac{1}{4} \\ \)
We have the final answer as
0.25 g/cm³Hope this helps you
hello,
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What are the uses of Concentrated Cinnamon Water BPC ?
Answers
In talc preparation, it is used during the filtration process and also acts as a distribution agent. When it is added to the dill water, it combines with all other compounds present in the substance and leaves the water alone. In this way, it acts as a filtering agent.