Which of the following is a balanced equation for the reaction described below?
Aqueous copper (II) chloride reacts with solid aluminum to produce aqueous aluminum chloride and solid copper.
A) CuCl2(aq) + Al(s) = AlCl3(aq) + Cu(s)
B) 3Cu2 Cl(aq) + Al(s) = AlCl3(aq) + 6Cu(s)
C) CuCl(aq) + Al(s) = AlCl(aq) + Cu(s)
D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
The balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
From the question,
We are to determine which of the given equation for the described reaction is balanced.
The described reaction is the reaction between aqueous copper (II) chloride and solid aluminum to produce aqueous aluminum chloride and solid copper.
That is,
CuCl₂(aq) + Al(s) = AlCl₃(aq) + Cu(s)
Now, we will balance the above equation, using the smallest whole number coefficients
The balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s)
Hence, the balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
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How many atoms is 3.49x1032 moles of KOH?
2.1 x 10⁵⁶ atoms
Further explanationThe mole is the number of particles(molecules,atoms,ions) contained in a substance
1 mol = 6.02.10²³
number of atoms :
[tex]\tt 3.49\times 10^{32}\times 6.02\times 10^{23}=2.1\times 10^{56}[/tex]
please help
How many joules of heat are needed to raise the temperature of 250 g of liquid weer by 500°C
Answer:
What is the total number of joules of heat energy needed to 16) How many joules of heat ... raise the temperature of 10 grams of water from 20°Сto ... 2) · The temperature of 100 grams of water changes from 16°C/7How many kilojoules of ... temperature of 500. grams of water from 10.0°C to 30.0°C? ... m250 -Q=209051. | c= ...
Explanation:
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What are the trends for atomic size and ionization? Explain why for each trend. Tell me the direction- up or down a group and across a period for each trend. Use the lecture, the video at the end of the lecture, or the guide for periodic trends to respond to this prompt.
Answer:
See explanation
Explanation:
Atomic size increases down the group due to the addition of more shells.
As more shells are added and repulsion of inner electrons become more significant, atomic size increases down the group. However, across the period, atomic size decreases due to increase in effective nuclear charge without any increase in the number of shells. This causes increased attraction between the nucleus and the outermost shell thereby decreasing the size of the atom.
Ionization energy decreases down the group because the outermost electron is more shielded by inner electrons making it easier for this outermost electron to be lost. Across the period, ionization energy increases due to increase in effective nuclear charge which makes it more difficult to remove the outermost electron due to increased nuclear attraction.
How many moles are present in 450 grams of sodium phosphide, Na3PNa3P?
a. 450 moles
Selected:b. 99.9 moles
c. 44,995 moles
d. 4.50 moles
Answer:
4.5moles
Explanation:
Given parameters:
Mass of Na₃P = ?
Unknown:
Number of moles = ?
Solution;
The number of moles in a given substance can be derived from the expression below;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Na₃P = 3(23) + 31 = 100g/mol
Number of moles = [tex]\frac{450}{100}[/tex] = 4.5moles
Is the rate of decay fastest at the beginning, middle, or end of the process?
Answer:
The beginning
Explanation:
In a nuclear reaction, the rate of decay is fastest at the beginning of the process.
What are nuclear reactions?There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
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Changes in which two characteristics can indicate a physical change?
A. Shape
B. Reactivity
O C. State
D. Flammability
Changes in shape and state are the two characteristics which indicate a physical change.
What are physical changes?Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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Name the change of state when a liquid becomes a gas
Answer: Evaporation
Explanation: the process of turning from liquid into vapor
a student places a small stone with a mass of 5 g into a graduated cylinder containing 50 mL of water. With the stone in the graduated cylinder, the water rises to 75 mL. What is the density of the stone?
Answer:
The answer is 0.2 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
volume = final volume of water - initial volume of water
volume = 75 - 50 = 25 mL
We have
[tex]density = \frac{5}{25} = \frac{1}{5} \\ [/tex]
We have the final answer as
0.2 g/mLHope this helps you
Which type of bond shares the electrons between two elements?
Answer:
Covalent Bonds
General Formulas and Concepts:
Different types of bondsExplanation:
We have 3 types of bonds: Polar Covalent, Nonpolar Covalent, and Ionic bonds.
Nonpolar Covalent bonds share the electrons equally between the compound.
Polar Covalent bonds do NOT share the electrons equally, but STILL SHARE the electrons; the electron tends to stay with the element with the stronger electron affinity and thus creates dipoles.
Ionic bonds DO NOT share electrons. The electrons are transferred to the respective elements.
The autonomic nervous system consists of what parts?
A. Sympathetic
B. Autonomic
C. Parasympathetic
D. Somatic
HELP PLEASE
Answer:
A. Sympathetic
and
C. Parasympathetic
Explanation:
Ap3x
how many grams of magnesium are in 7.43 x 10 to the 22 atoms of mg
Mass of Mg=3 g
Further explanationThe mole is the number of particles contained in a substance
1 mol = 6.02.10²³
mol Mg in 7.43 x 10²² atoms :
[tex]\tt \dfrac{7.43\times 10^{22}}{6.02\times 10^{23}}=0.1234[/tex]
mass Mg
[tex]\tt mass=mol\times MW\\\\mass=0.1234\times 24.3=2.99\approx 3[/tex]
{b}
In experiment B. the iron filings weighed 2.0g at the beginning of the experiment
and the iron sulphide produced weighed 2.8g.
Explain this increase in mass.
Explanation:
The increase in mass is because the iron fillings have combined with a sulfide to produce iron sulfide and so the mass will increase.
In such a reaction like this, the mass of the reactants must be conserved. By so doing, the mass of reactants and products must be the same.
When two substances combine together, their masses added up to that of the individual masses. This helps to conserve the mass.
can someone explain what a water table is ? :)
Answer:
It is where the water lies underground
why is it easier to remove an electron from a sodium atom than a magnesium atom
A scientist is breeding orange butterflies in the laboratory she notices a white butterfly in the latest generation of animals she sequences the genome of this butterfly in notices a mutation in the genes that calls for pigment in the wings. Explain how this mutation would result in a white butterfly.
Answer:
See explanation
Explanation:
A gene mutation can be defined as a permanent change in the DNA sequence that composes a gene, resulting in the observation that the sequence differs from what is obtainable in most individuals that make up the population. Mutations range from a change in a single DNA building block (change in the sequence of base pairs) to changes in a large segment of a chromosome that includes multiple genes.
Mutation in the color of the wings of the housefly can be passed on to the next generation. If this trait enhances survival of the butterflies, the orange winged butterflies will eventual become extinct and become entirely replaced by the white winged butterflies. This implies that gene pool has been completely modified.
If same kind of mutation of pigmentation of wings is observed in the butterfly then they will result in a white butterfly.
What is mutation?If a gene of the DNA get damaged or changes in such a way that it also results in the changing of genetic message carried by that gene and this process is known by the name of mutation.
In the given question by breeding orange butterfly with a white butterfly in the latest generation of animals, notices a mutation in the genes that calls for pigment in the wings. If the mutation of pigmentation of wings is passed to the next generations with the same changes in the gene of DNA, then after some generation we would get white butterfly.
Hence, if the same changes observed in the mutation of pigmentation of wings then we get a white butterfly.
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what is the formula for calculating pH?
Lacie is riding her bicycle at a velocity of 5 m/s, her mass is 50kg. What is her kinetic energy?
Answer:
Explanation:
given,
velocity = 5m\s
mass = 50kg
kinetic energy = ?
therefore, we know that,
kinetic energy = 1\2 * mass * velocity^2
= 1\2 * 50* 5 ^ 2
= 1\2 * 50* 25
= 1\2 * 1250
= 625
therefore, kinetic energy is 625
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difference between acids and bases in terms of ions
Answer:
The answer will be listed below.
Explanation:
An acid is a substance that produces (H+) as the only positive ion when mixed with water. A base is a substance that produces (OH–) as the only negative ion when mixed with water.
Answer:
An acid increases the concentration, A base is a substance that releases hydroxide
Explanation: A base donates electrons and accepts protons, and acid is a substance that donates protons.
Due to the presence of dipole-dipole forces, polar covalent molecules like water tend to be _____ at room temperature. *
liquids
gases
metals
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Actually Welcome to the Concept of the Chemical bonds.
Due to the presence of dipole-dipole forces, polar covalent molecules like water tend to be _____ at room temperature.
The answer is Liquids
Water tends to be liquids at the room temperature.
what is the name of the structure?
Answer:
The structure is called Propyl ethanoate
Help fast... thanks I’ll give you brainliest
Answer:
Graph E matches description 3 (the car is accelerating).
Explanation:
When the graph increases, the line is turned up (graph E). So when something accelerates, it is going to increase. In this case, it would increase by speed.
How can you help save the environment from its total destruction?
Explanation:
Change the way you get around. ...
Be mindful of eating habits. ...
Grow your own food or buy it locally. ...
Embrace secondhand shopping. ...
Replace standard products with energy efficient versions. ...
Buy recycled products. ...
Spread the word. ...
Stop using plastic water bottles.
Answer:
hope it's help u
Explanation:
Stunning Ways to Save the Environment from Destruction
Change the way you get around. ...
Be mindful of eating habits. ...
Grow your own food or buy it locally. ...
Embrace secondhand shopping. ...
Replace standard products with energy efficient versions. ...
Buy recycled products. ...
Spread the word. ...
Stop using plastic water bottles.
Which is the right answer?
Answer:
i think its C
Explanation:
Quantum Mechanics relies on probability to say what region of space an electron ismostlikelyto occupy. In your own words, describe how this principle results in the shapes ofthe orbitals.
Answer:
Explanation:
Since electrons are particles that are in constant movement in a wave-like motion, is impossible to know exactly their position and velocity at all times. That's why instead of defining an orbit for them we define an atomic orbital, which is a location in space where the probability of finding an electron is high (therefore, is an electron dense zone). Since this zone has not defined limits (the wave function characterizing the orbital extend from the nucleus to infinity), the further we go from the nucleus the less dense this "cloud" is.
There is about a 90 percent probability of finding the electron within a sphere of radius 100 pm surrounding the nucleus. Thus, we can represent the 1 s orbital by drawing a boundary surface diagram that encloses about 90 percent of the total electron density in an orbital, and the shape of this orbital is a sphere.
The boundary surface diagrams of p orbitals, for example, will have the shape of two lobes on opposite sides of the nucleus, that means that within this two lobes we have a 90 percent probability of finding the electron, and so on.
What relationship between the speed of each car and its motion after the collision do you observe? How do Newton's laws help explain your observations?
Answer:
I think that the previous answer will help you with this one, Newton´s laws explain it because of the action-reaction law, the resulting forces will be balanced or overloaded in one object, depending of the mass acceleration/speed or force applied to one object.
Explanation:
Sonja and Jeremy performed several experiments to show how changes in temperature affected the volume of an inflated balloon. They made sure the pressure stayed the same. They also showed the effects of pressure on volume if temperature stayed the same. They organized their information in this table. Which experiments provide evidence for Boyle’s law?
Answer:
They also showed the effects of pressure on volume if temperature stayed the same
Explanation:
They also showed the effects of pressure on volume if temperature stayed the same is the experiment that will provide an evidence for Boyle's law.
Boyle's law states that "the volume of a fixed mass of a gas varies inversely as the pressure changes, if the temperature is constant".
The law is an affirmation of what happens when there is a dynamics between pressure and volume if temperature is made constant. So the experiment designed to investigate this proves and shows Boyle's law.we (get) up at 4:30 yesterday morning
Answer:
oop oof
Explanation:
Ionization energy definition?
Answer:
In physics and chemistry, ionization energy or ionisation energy, is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.
I hoped this helped :D
Explanation:
According to Charles’ Law, if I __________ the Kelvin temperature, it will __________ the volume.
Answer:
increase is the answer for both ig?