Answer:
Explanation:
The specific heat of a substance is the amount of heat required to the raise the temperature of a unit mass of substance by 1°C.
This physical quantity is usually determined in the laboratory. It is an intensive property of substances and a constant for pure samples of material.
Specific heat for the steel wire 0.82J/g°C
specific heat for the steel wire 0.47J/g°C
specific heat for the lead pellets 0.25J/g°C
Specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.
It has been a physical quantity and has been directly proportional to the motion of molecules.
Specific heat:
The increase in mass of the substance results in the increase in the attraction force and thus the motion of the atoms has been slow down. Thus, with the increase in mass of the element, the specific heat decreases.
The specific heat of the following elements has been:
Specific heat of aluminum wire, [tex]c=0.82\rm \;J/g^\circ C[/tex]Specific heat of steel wire, [tex]c=0.47\rm \;J/g^\circ C[/tex]Specific heat of lead pellets, [tex]c=0.25\rm \;J/g^\circ C[/tex]For more information about specific heat, refer to the link:
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Which word equation shows hydrogen reacting with oxygen to form water?
O oxygen + water → hydrogen
O hydrogen + oxygen Water
O oxygen + water → hydrogen + 'water
O hydrogen + water → oxygen
Nex
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Mark this and return
Explanation:
hydrogen + oxygen = water
Word equation that shows hydrogen reacting with oxygen to form water is Hydrogen + oxygen → Water
In a chemical reaction the compounds that are present in the left hand side of the reaction is reactants and those present on the right hand side are products.
Given options are-
O oxygen + water → hydrogen
O hydrogen + oxygen→ Water
O oxygen + water → hydrogen + 'water
O hydrogen + water → oxygen
Therefore, Word equation that shows hydrogen reacting with oxygen to form water is Hydrogen + oxygen → Water.
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Select the correct answer.
For the reaction PC15(e) + heat - PC13(e) + Cl2ce), what will happen when the temperature is decreased?
OA.
There will not be a shift in equilibrium.
OB.
There will be a shift toward the products.
OC.
There will be a shift toward the reactants.
OD. Not enough information is given.
Reset
Next
Answer:
Option D. There will be a shift toward the reactants.Explanation:
The reaction is:
[tex]PCl_5(g)+heat\rightleftharpoons PCl_3(g)+Cl_2(g)[/tex]
The application of LeChatelier's principle leads to consider the heat as a reactant or a product depending on if it is on the left side or the right side.
In this reaction, the heat is on the left side, thus it must be considered a reactant.
Decreasing the temperature is equivalent to remove or consume heat. Thus, the reaction must shif to the left to compensate that reduction of heat. That is the reverse reaction shall be favored.
In conclusion, there will be a shift toward the reactants.
time that is measured in definite periods such as minutes, day,and years is called
Answer:
1. relative time
2.absolute time
Explanation:
Time that is measured in definite periods such as minutes, days, and years is called
a. Relative time.
b. absolute time.
A boy makes a small snowball and then pushes it around in the snow to make it bigger. He pushes it at a constant speed as the snowball gets bigger. If the snowball doubles in mass, what will happen to the kinetic energy ( Motion energy) of the snowball?
Answer:
It will decrease
Explanation:
As the snowball gets bigger, the kinetic energy of the body begins to reduce appreciably.
The condition given in this problem is constant speed.
At constant speed, the snowball is not accelerating and there is no external force acting appreciably on the ball.
Now, we know that;
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass of the ball
v is the velocity of the ball
In this scenario, the velocity of the ball is constant and not changing. But the mass of the ball begins to increase, eventually, the kinetic energy of the ball will reduce.
The increasing mass without an appreciable increase in velocity will bring the body to rest as a result of increase inertia of the body.
1a. A spring takes a force of 5.ON to extend it by 2.0cm. What is the spring
constant in N/m?
Answer:
Use Hooke's law
Explanation:
Apply formula: F = kxSub values in: 5 = 0.02kUse algebra: k = 250The spring constant is 250 N/mis li3n ionic or covalent
Final answer:
Li3N, or lithium nitride, is primarily an ionic compound formed by the transfer of electrons from lithium to nitrogen, resulting in Li+ cations and N3- anions.
Explanation:
The compound Li3N (lithium nitride) is primarily considered to be ionic in nature. Lithium (Li), being in Group 1 of the periodic table, is a metal, and nitrogen (N2), being in Group 15, is a nonmetal. The electronegativity difference between them is significant, which leads to the formation of ionic bonds as lithium donates electrons to nitrogen, forming cations (Li+) and an anion (N3-). Although lithium can form polar covalent bonds due to its high charge density and the polarizing effect it has on its bonding partners, in the case of lithium nitride, the overwhelmingly dominant type of bonding is ionic.
While lithium can form more covalent type bonds in organometallic compounds, when combined with a nonmetal such as nitrogen, the result is an ionic compound. It is important to consider that while the distinction between ionic and covalent bonds is taught, in reality, there is often a continuum with many compounds exhibiting characteristics of both ionic and covalent bonding. However, based on lithium nitride's composition and attributes, it falls closer to the ionic side of the spectrum.
Which best describes the people who use chemistry in their careers?
Answer:
D
Explanation:
Answ
D
Explanation:
Any ones whos job requires chemical
How many cups do you need for 4 moles rock salt (NaCl)? Rock salt weighs 520g per 1 cup
How many cups do you need for 1 kg of ice? Ice cubes weigh 220g per 1 cup
Answer :
(1) The number of cups needed are, 0.45 cups.
(2) The number of cups needed are, 5 cups.
Explanation :
Part 1:
First we have to calculate the moles of NaCl.
[tex]\text{Moles of NaCl}=\frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}}[/tex]
[tex]\text{Moles of NaCl}=\frac{520g}{58.5g/mol}=8.89mol[/tex]
Now we have to calculate the number of cups needed.
As, the number of cups needed for 8.89 mole of NaCl = 1 cups
So, the number of cups needed for 4 mole of NaCl = [tex]\frac{4}{8.89}=0.45[/tex] cups
Thus, the number of cups needed are, 0.45 cups.
Part 2:
Given:
Mass of ice cubes = 1 kg = 1000 g
Now we have to calculate the number of cups needed.
As, the number of cups needed for 220 g of ice = 1 cups
So, the number of cups needed for 1000 g of ice = [tex]\frac{1000}{220}=4.5\approx 5[/tex] cups
Thus, the number of cups needed are, 5 cups.
Why corrosion of aluminum is an advantage for the metal and why the corrosion of iron a serious problem
Answer:a
Explanation: duh man
Answer:
To answer your first question, when the outer layer of aluminum interacts with oxygen, it forms an aluminum oxide layer that is passive. While the outer layer corrodes, it provides a protective coating that protects the inner layer from further deterioration. As a result, aluminum corrosion is beneficial.
To answer your second question, corrosion of iron is a serious problem because almost all things in our civilization is made of iron or one of its alloys, from automobiles to homes, tools to prosthetics.
When you look back at the past of corrosion research, you'll notice that it all began with the question "why does iron rust?" The most powerful organization of corrosion engineers, NACE, crunched the numbers, and the total amount of iron (only in the United States) is in the billions!
When you consider how inexpensive iron is in comparison to other metals, you can see why it is so widely used; and when you consider all of the developments in metallurgy over the last century, you can see how scientists have worked to improve its sturdiness: new alloys with improved corrosion resistance and strength; treatments to postpone corrosion and even attempt to replace it.
Explanation:
I deeply apologize if this is a late or overdue answer. I also hope this answers your original question and if it doesn't, I deeply apologize.
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To what pressure must a gas be compressed in order to get into a 3.00 cubic foot tank
the entire weight of a gas that occupies 400.0 cu. ft. at standard pressure?
Answer:
101333.33mmHg
Explanation:
The following were obtained from the question:
P1 = at stp = 760mmHg
V1 = 400.0cu.ft
V2 = 3cu.ft
P2 =?
Using Boyle's law equation, we obtained:
P1V1 = P2V2
760 x 400 = P2 x 3
Divide both side by the 3
P2 = (760 x 400) /3
P2 = 101333.33mmHg
The gas must b compressed to a pressure of 101333.33mmHg
explain polarizing power with ionic radius
Answer:
Polarizing Power is the basis of Fajan's rules of covalent character generally in ionic compounds.
Charges and radius are a function of Polarizing Power, because the higher the charge is, the larger the polarizing power is for cations with the same radius. Also the smaller the radius is, the larger the polarizing power is for cations with the same charge.
Explanation:
A simple of helium measuring 6L was kept at a pressure is of 1.5 atm ,if pressure is doubled what would be its new volume ?
Answer:
3L
Explanation:
The following data were obtained from the question:
V1 (original volume) = 6L
P1 (original pressure) = 1.5 atm
P2 (new pressure) = 2 x P1 ( since the new pressure is doubled)
P2 = 2 x 1.5
P2 = 3 atm
V2 (new volume) =?
Using the Boyle's law equation P1V1 = P2V2, the new volume can be obtain as follow:
P1V1 = P2V2
1.5 x 6 = 3 x V2
Divide both side by 3
V2 = (1.5 x 6)/3
V2 = 3L
From our calculations, the new volume will be half the original volume and this will be 3L
How many grams of carbon are in 36.6 grams in glucose
Answer:
14.64 grams of carbon
Explanation:
The Molecular formula of Glucose is C₆H₁₂O₆.
From the molecular formula, the Molar mass of Glucose is,
Mass of Carbon in Glucose = 6*12 = 72.
Mass of Hydrogen in Glucose = 12*1 = 12.
Mass of Oxygen in Glucose = 6*16 = 96.
Molar mass of Glucose = 72+12+96 = 180 grams.
180 grams of Glucose contains 72 grams of Carbon.
How many grams of Carbon are there in 36.6 grams of Glucose.
180 --> 72
36.6 --> ?
Let it be 'x' grams
Then, by Criss Cross, (x)(180) = (36.6)(72) => x = 14.64 grams.
Therefore 14.64 grams of carbon are there in 36.6 grams in glucose.
Which of the following combinations would produce a neutralization reaction?
A. a substance with a pH of 7 and a substance with a pH of 9.
B. a substance with a pH of 2 and a substance with a pH of 10.
C. a substance with a pH of 12 and a substance with a pH of 8.
D. two solutions with the same pH levels.
Explain please, i don't want rushed answers
Answer:
it is option b
Explanation:
this is because neutralisation reaction takes place only between a base and an acid.
now, in OPTION A it is a neutral and base
OPTIONB it is acid and base
OPTION C both are base
OPTION D IT IS NOT POSSIBLE
A neutralization reaction involves an acid and a base, with pH levels generally below and above 7 respectively. To identify a combination that would result in such a reaction, we require an acidic and a basic substance. Thus, the correct combination would be option B: a substance with a pH of 2 (acid) and a substance with a pH of 10 (base).
Explanation:The subject in question pertains to neutralization reactions in chemistry. A neutralization reaction typically involves a strong acid and a strong base reacting to form water and a type of salt. The pH scale measures how acidic or basic a solution is, and ranges from 0 to 14. If we remember that a pH of 7 is neutral, acids are typically represented with a pH less than 7, and bases are represented with a pH greater than 7, we can use that to find our answer.
Based on these principles, options A and C wouldn't yield a neutralization reaction because they both involve a neutral or basic substance with another base. Option D does not guarantee a neutralization reaction either as the two solutions could be both acidic or basic. Therefore, the correct choice would be option B: a substance with a pH of 2 (which would be an acid) and a substance with a pH of 10 (which would be a base). The acid-base combination would result in a neutralization reaction.
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Which is transferred due to a temperature difference?
A. heat energy
B. electrical energy
C. chemical energy
Answer:
A
Explanation:
heat energy is transfered through a hot object touching a cold object
Final answer:
Heat energy is the transfer of energy due to a temperature difference between two systems, such as from a warm hand to a colder ice cube. This transfer occurs spontaneously and can result in the change of state of matter, like melting. Heat flows from a higher to a lower temperature and can play a role in various chemical and physical processes.
Explanation:
Energy transfer due to a temperature difference is known as heat energy. This kind of energy transfer occurs because heat is the spontaneous transfer of energy that happens when there is a difference in temperature between two systems. For instance, when an ice cube is held in your hand, the heat from your hand is transferred to the ice cube, causing it to melt.
Thermodynamically, heat energy is the energy that is transferred from one system to another that is not work. This might occur during various processes, such as when electrical energy is converted into light energy in a light bulb and some energy is lost as heat, or during cellular metabolic reactions. Additionally, matter has thermal energy due to the kinetic energy (KE) of its molecules, and temperature corresponds to the average KE of those molecules. Heat energy flows from a higher to a lower temperature, and it can be absorbed or released during chemical and physical processes.
Room has a dimension of 10ft x 20 ft x 8 ft. What is the volume of the room in cubic yards if 1 yard = 3ft
Answer:
1600/27 cubic yards
Explanation:
Convert each of the dimensions into yards, getting 10/3, 20/3, and 8/3. Multiply them all to get 1600/27
how to balance Na + FeBr3 →
Hey there!
Na + FeBr₂ → NaBr + Fe
Firstly, balance Br.
Two on the left, one on the right. Add a coefficient of 2 in front of NaBr.
Na + FeBr₂ → 2NaBr + Fe
Next, balance Na.
One on the left, two on the right. Add a coefficient of 2 in front of Na.
2Na + FeBr₂ → 2NaBr + Fe
Lastly, balance Fe.
One on the left, one on the right. Already balanced.
Our final balanced equation:
2Na + FeBr₂ → 2NaBr + Fe
Hope this helps!
the law of conservation of mass states that in achemical reaction,matter is not cratered or destroyed. is it True or False
Answer: true
Explanation: matter can’t be created or destroyed, none the less
How Can Chemically React Fluoroantimonic acid (1) and Diethynylbenzene Dianion (2) :-
H ₂FSbF ₆ (1) + C ₆H ₄C²⁻ ₄ (2) →
Explanation:
your protons will likely go towards (2)
leaving you with
FSbF6^-2+ H2C6H4C4
A baseball is thrown high into the air. As it travels upwards it loses speed and slowly comes to a stop high above the grove what is it converting to
Answer:
Potential energy
Explanation:
The thrown baseball is converting from kinetic energy into potential energy. When it finally stops at a particular height, it attains its maximum potential energy at the position or point.
Potential energy is the energy at rest of body. Kinetic energy is the energy due to the motion of body.The more a body speeds, the higher its kinetic energy attained.
As a body comes to rest, at a height, it attains potential energy.
The body during flight decreases in kinetic energy but increases its potential energy due to gravity pulling it to rest.
The answer is Potential Energy.
Reasoning:
The thrown baseball is converting from kinetic energy into potential energy. When it finally stops at a particular height, it attains its maximum potential energy at the position or point. Potential energy is the energy at rest of body. Kinetic energy is the energy due to the motion of body. The more a body speeds, the higher its kinetic energy attained. As a body comes to rest, at a height, it attains potential energy. The body during flight decreases in kinetic energy but increases its potential energy due to gravity pulling it to rest.
Plants grow in many different shapes and sizes. Much of their shape depends on an internal structure that is composed of carbon-containing molecules such as cellulose and lignin. Plants that have a strong internal structure can grow larger than other plants because their structure can support their size.
Plants obtain the majority of the carbon necessary for building these structural molecules from —
A) air
B) microorganisms
C) soil
D) water
Answer:
A. Air
Explanation:
Lignin which has a glucos link is a unique hydrocarbon comprising 8-20% of the cell wall of plants. It is a complex, dense, amorphous, secondary cell wall polymer found in the trachea elements and sclerenchyma of terrestrial plants.
Since plant absorbs carbon dioxide from air to form glucose and hence, starch; That is the source of carbon to build other macromolecules.
Water which it absorbs from soil is not of carbon content neither do plant take in microorganisms.
Plants obtain the majority of the carbon necessary for building these structural molecules from air
General, plants that have a very strong internal structure can grow larger than other plants because their structure can support their size. They absorbs carbon dioxide from air to form those carbon-containing molecules
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3. A sample of a gas has a mass of 1.25 g and a volume of 1000 cubic centimeters. Solve for density and
identify the gas.
Answer:
The density of the gas is 0.00125 g/cc and the gas is Air.
Explanation:
Given,
mass of gas = 1.25 grams
Volume = 1000 cc.
Density = ?
Density of the gas can be found by using the formula
Density = Mass/Volume
Substituting the values we get,
Density = 1.25/1000 = 0.00125 g/cc.
The gas is air because at room temperature and pressure air has a density of 0.00125 g/cc.
How are the layers of Earth's atmosphere grouped?
(A) by similarities in thermal characteristics, chemical composition,
movement, and density
(B) by differences in thermal characteristics, chemical composition,
movement, and density
(c) by similarities in thermal characteristics and chemical composition but
differences in movement and density
(D) by differences in thermal characteristics and chemical composition but
similarities in movement and density
Answer:
B)
Explanation:
The layers of the atmosphere are classified by changes in temperature in accordance with height.
the blank is a structure in a cell that contains information that controls a cells function
Answer:
The nucleus
Explanation:
The nucleus controls the metabolic functions of the cell by producing mRNA which encodes for enzymes e.g. insulin. The nucleus controls the structure of the cell by transcribing DNA which encodes for structural proteins such as actin and keratin.
4) How many grams are there in 7.40 moles of AgNO37
Answer:
1258 grams of AgN03
Explanation:
We calculate the weight of 1 mol of AgN03:
Weight 1 mol AgN03= Weight Ag + Weight N +( Weight 0)x3=108g+ 14g+16gx3=170 g/mol
1 mol----170 g AgN03
7,4mol---x= (7,4 mol x170 g AgN03)/1 mol=1258 g AgN03
Why must the chemical equation be balanced ?
A. Insure proper computation of molecular mass
B.To do extra work
C.Insure proper mole ratio between reactants and products
D.to fulfill the Law of Conservation of Energy
Answer:
D
Explanation:
the answer is d as the law of conservation must be hold good during the equation
Write a chemical equation for the reaction between ammonia and sulfuric acid
Answer:
NH3 + H2SO4 ---> ((NH4)2)SO4 + H2O
Explanation:
This is a common reaction; ammonia and sulfate make ammonium sulfate and the excess hydrogen and oxygen(not part of a polyatomic ion) get into the form of H2O
I hope this helps!
(This can commonly be confused as double replacements but hydrogen is in both reactants.)
What is the gfm of CO2?
Answer:
44.01 g/mol because its basically the weight
Explanation: 12.0107 + 15.9994*2
The gfm (Gram Formula Mass) or molar mass of CO₂ (Carbon Dioxide) is calculated by adding the atomic masses of its constituents: one Carbon atom (12.01 g/mol) and two Oxygen atoms (32 g/mol). This adds up to 44.01 g/mol.
Explanation:You asked for the gfm (Gram Formula Mass) of CO₂. Gram Formula Mass is another term for molar mass, which is calculated by adding up the atomic masses of all the atoms in the molecule. In the case of CO₂, we have one atom of Carbon and two atoms of Oxygen.
The atomic mass of Carbon (C) is approximately 12.01 g/mol, and that of Oxygen (O) is approximately 16.00 g/mol. Since there are two Oxygen atoms, their combined mass is 2 * 16.00 = 32.00 g/mol.
Adding the atomic masses of Carbon and Oxygen together gives us the total gfm of CO2: 12.01 g/mol (Carbon) + 32.00 g/mol (Oxygen) = 44.01 g/mol (for CO₂).
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What is the pressure of 2.0 mol nitrogen (N2) gas in a 0.5 L container at 310
K?
(The universal gas constant is 0.0821 L'atm/mol.K.)
O
O
A. 6.4 atm
B. 100 atm
C. 0.0098 atm
O D. 25 atm
SUBMIT
Answer:
100 atm
Explanation:
Answer:
Option B. 100atm
Explanation:
The following data were obtained from the question:
n = 2moles
V = 0.5L
T = 310K
R = 0.0821 L.atm/mol.K
P =?
The pressure can obtained by doing the following:
PV = nRT
P = nRT /V
P = (2 x 0.0821 x 310)/0.5
P = 100atm
a. Write a balanced chemical equation for this reaction below.
Fe(s) + H2O2(aq) produces FeO3(s) + H2O (l)
Answer:
Fe(s) + 3H2O2(aq) ................. FeO3(s) + 3H2O (l)
Explanation:
Fe(s) + H2O2(aq) ---------------- FeO3(s) + H2O (l)
To balance the equation put coefficient of 3 at back of H2O and H2O2
Fe(s) + 3H2O2(aq) ................. FeO3(s) + 3H2O (l)
To check, the number of atoms of each element on the left must be equal to that of the right.
Element Left. Right
Fe. 1 1
H. 3×2=6 2×3=6
O. 3×2 =6. 3+3 = 6
This shows that the equation is balanced
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