Answer:
Energy cannot be created or destroyed.
Explanation:
According to the law of conservation of energy, energy can neither be created nor it can be destroyed. Energy can only be transformed from one matter to another. The conservation of energy remains constant in an isolated system. The law is applicable in the system that does not exchange energy in the environment. Energy changes its form but remains constant.
Answer:
Energy cannot be created or destroyed
Explanation:
It's A on Edge
In the reaction between Lithium Sulfate and an excess of Lead (II) Nitrate, how many molecules of Lithium Nitrate can be expected as a product if 13.3 grams of Lithium Sulfate are used? Show your work.
Li2SO4 + Pb(NO3)2 =
Answer:
[tex]1.46x10^{23}molecules \ LiNO_3[/tex]
Explanation:
Hello,
In this case, the undergoing chemical reaction is:
[tex]Li_2SO_4 + Pb(NO_3)_2 \rightarrow PbSO_4+2LiNO_3[/tex]
Thus, since lead (II) nitrate is in excess, we can directly compute the moles of lithium nitrate by applying the 1:2 molar ratio between them in the chemical reaction as well as the molar mass of Lithium Sulfate that is 110 g/mol for the stoichiometric shown below factor:
[tex]n_{LiNO_3}=13.3gLi_2SO_4*\frac{1molLi_2SO_4}{110gLi_2SO_4} *\frac{2molLiNO_3}{1molLi_2SO_4} =0.242molLiNO_3[/tex]
Finally, by using the Avogadro's number we are able to compute the molecules:
[tex]0.242molLiNO_3*\frac{6.022x10^{23}molecules\ LiNO_3}{1mol}=1.46x10^{23}molecules \ LiNO_3[/tex]
Best regards.
Complete question:
In the reaction between Lithium Sulfate and an excess of Lead (II) Nitrate, how many molecules of Lithium Nitrate can be expected as a product if 13.3 grams of Lithium Sulfate are used? Show your work.
Li₂SO4 + Pb(NO3)₂ = LiNO₃ + PbSO₄
Answer:
0.242 molecules of Lithium Nitrate
Explanation:
Given:
Li₂SO₄ + Pb(NO3)₂ = LiNO₃ + PbSO₄
A balanced form of the equation:
Li₂SO₄ + Pb(NO3)₂ = 2LiNO₃ + PbSO₄
When 13.3 grams of Lithium Sulfate (Li₂SO4 ) are used, the number of molecules of Lithium Nitrate (LiNO₃) that can be expected as a product is calculated as;
molecular mass of Li₂SO₄ = (7 x 2) + (32) + (16 x 4)
= 14 + 32 + 64
= 110 g
110 g of Lithium Sulfate -----------> 2 molecules of Lithium Nitrate
13.3 g of Lithium Sulfate ------------> ? molecules of Lithium Nitrate
= (2 x 13.3) / 110
= 0.242 molecules of Lithium Nitrate
Therefore, 13.3 grams of Lithium Sulfate will produce 0.242 molecules of Lithium Nitrate
What would the pOH of a solution be if the [H"]= 3.00 x 10-5 moles/liter?
8.52
9.48
Answer:
9.48
Explanation:
pH=-log(H+)
pOH+pH=14
Answer:
9.48
Explanation:
Got it right on Odessyware ;) Have a Nice Day!!!!
A solution has [OH-] of 1x10^-2, what is the pOH of this solution
Answer:
The answer is: [D]: "12" .
Explanation:
i just did it
4 Points
The battery in the circuit shown is 9.0 V, and the current flowing through the
circuit is 3.0 A. What is the resistance?
Answer:
3 ohms
Explanation:
R=V / I
R=9V / 3 A
R=3 ohms
The rows on the periodic table are arranged so that ______ are on the right side and ______ are on the left side.
Non-metals/Metals
Metals/Non-metals
Gases/Metals
Metals/Gases
Answer:
Metals on the right side and non metals on the left side.
The correct answer is; Non-metals/Metals
Metals are found at the left hand side of the periodic table while non metals are found at the right hand side of the periodic table.
The periodic table is an arrangement of elements in order of increasing atomic number according to the modern periodic law.
The elements in the periodic table are arranged in rows and columns. The rows are called periods while the columns are called groups.
Metals are found at the left hand side of the table while non metals are found at the right hand side of the table.
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A news report is an example of what kind of literature?
What type of literature often contains deeper ideas and concepts?
Answer:
1) I dont knoe
2) Poetry
Explanation:
Answer: Symbolic language is used by an author to hint at deeper meanings.
Explanation: penn foster
A well-known scientist testifies that she believes a piece of evidence is accepted by science. The judge rules that the evidence is not, in his opinion, admissible. Which case applies to the decision?
a. Daubert v. Merrell Dow Pharmaceuticals
b. Daubert v. Frye
c. Kumho Tire Co. Ltd. v. Daubert
d. Frye v. United States
Answer:
The correct answer is C:
Kumho Tire Co. Ltd V. Daubert
Explanation:
In this case, the appellant (Daubert) has sued Kumho Tire Co. Ltd (the defendant) when 3 months prior the right rear tyre of his car exploded while the car was in motion killing a passenger and injuring others severely.
The appellant employed the services of an expert who had worked for 10 years with Michelin to give his opinion as having studied the attributes of the tire technology.
In a counter-argument, the defendant rather than dispute the opinion of the expert urged the court to exclude it as evidence because his methodology didn't conform to the requirements of the Law as given in Rule 702 of the Federal Rules of Evidence.
True to the defendants' position, the Law by the ruling in Daubert v Merrell Dow Pharmaceuticals required that for the opinion to count, it had to be scientifically correct. It was hence excluded as evidence in the case.
Cheers!
When 47.2 J of heat is added to 13.4 g of a liquid, its
temperature rises by 1.74 °C.
What is the heat capacity of the liquid?
Answer: 2.02 J/g°C
Explanation:
To find the heat capacity, we have to manipulate the equation for heat.
q=mCΔT becomes C=q/(mΔT) to find heat capacity. Since we are given our values, we can plug in to find C.
[tex]C=\frac{47.2J}{13.4g*1.74°C}[/tex]
*Please ignore the capital A in front of the °C. In order to have ° in the equaiton, the A pops up.
[tex]C=2.02J/g°C[/tex]
In the following table, all the columns for the element oxygen are filled out correctly. Element Electron Structure of Atom Electron Structure of Ion Net Ionic Charge Oxygen 1s2, 2s2, 2p4 1s2, 2s2, 2p6 -2 True False
Answer:
1s², 2s², 2p⁴
Explanation:
Hello,
To determine the filling of electrons in an orbital, we'll have to apply several rules such as
1. Aufbau principle
2. Hunds rule
3. Pauli's exclusion principle.
I won't explain the above rules because I don't want to deviate from the question, but however if you understand them, it'll make questions like this easier to answer.
For oxygen atom
₈O = 1s² 2s² 2p⁴
The filling of the orbital must start with 1s orbital till the space of the two electrons are filled before moving to 2s orbital filling the two space in the shell and then finally the remaining 4 electrons on the 2p orbital.
Assuming the net ionic charge of oxygen in this case is zero (0) and has not accepted electron.
However, oxygen usually accepts 2e⁻(electrons) to attain stability (all orbital strive to attain duplet or octet configuration).
Assuming we have O²⁻, the electron configuration change to 1s² 2s² 2p⁶. This is the state oxygen usually forms compounds in excerpts with group 1 metals where it is able to form super oxide.
HELPPPPPP
Cracking of heptane please help! Show the chemical formula and the diagrams
7. What is the shape of an s orbital?
A dumbbell
B clover leat
C spherical
D donut
List the ways in which lightning can be produced
Answer:
Lightning is produced by the rapid transfer of free electrons when one of the following conditions exist:
One part of a cloud is positively charged and a neighboring part of the same cloud is negatively charged.
A positively charged cloud comes near a negatively charged cloud.
A cloud with either a positive charge or a negative charge comes near the earth.
An 85 kg construction worker has 37 485 J of gravitational potential energy. To the nearest whole number, the worker is___
m above the ground
Answer:
44,1 m
Explanation:
Ep= m * g * h
37485 = 85 * 10 * h
h = 44,1 m
Answer:
The answer is 45 on edge 2020
Explanation:
hope this helps :)
Elastic energy is stored when an object is stretched. Is this an example of potential or kinetic energy?
Answer:
potentialExplanation:
Each time energy is transferred into an object, two things happen.
It is either used to do work, or it is stored in the object.
If it is stored, the object is given potential energy that can be released to do work.
it is like in a coiled spring or a stretched elastic band. The energy is stored in the bonds between atoms. The bonds absorb energy as they are put under stress and release the energy as they relax (when the object returns to its original shape).
Myka wants to know more about the physical properties of salt and sugar. She performs the investigation in the video above. What can she conclude about salt and sugar?
Question 5 options:
The bonds in sugar are stronger than the bonds in salt, because sugar was so reactive when the heat was added.
The bonds on salt are stronger than the bonds in sugar, because it would have required adding even more energy to break the bonds in salt.
Answer:
Hi there!
The correct answer is: The bonds on salt are stronger than the bonds in sugar, because it would have required adding even more energy to break the bonds in salt.
Explanation:
Salt has ionic bonds, while sugar has covalent bonds.
Ionic bonds are stronger than covalent bonds, therefore it takes more energy to break.
Which structure shows the correct electron arrangement in CCl4?
A central upper C is single bonded to upper H above, below, and to the left, and single-bonded to upper C l to the right. The C l has three pairs of electron dots, above, right, and below.
A central upper C is single bonded to upper C l to the top, bottom, and left; those upper C l atoms have three pairs of electron dots on the sides away from the bond. The C is also single bonded to an upper H to the right.
A central upper C is single bonded to upper H above and below, and to upper C l to the left and right. The C l have three pairs of dots, above, below, and to the side opposite the bond.
A central upper C is single bonded to upper C l above, right, left, and below. All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond.
Answer:
the correct answer is D.
Explanation:
Got it right on edg. 2020
The correct structure for [tex]CCl_{4}[/tex] will be " All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond."
What is bond?A chemical bond would be a strong bond which could be formed among atoms, ions, as well as molecules to create chemical compounds.
What is electron dots?Lewis dot structures, commonly known as electron dot structures, were schematics showing the interatomic chemical bonds in such a molecule.
The electron dot structure of [tex]CCl_{4}[/tex] is shown below:
It can be seen that each carbon attached by single bond.
The correct structure for [tex]CCl_{4}[/tex] will be " All the Cl atoms have 3 pair of electron dots, on the three sides that do not have the bond."
Therefore, the correct answer will be option (D).
To know more about electron dot structure.
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Drag each label to the correct location on the diagram. Each label can be used more than once.
What is the correct way to represent the ionic compound sodium fluoride?
Answer:
NaF
Explanation:
I'm not exactly sure what you are asking for, but this is the formula for sodium fluroride.
We need the diagram to be able to help you with this, please take a screenshot of the diagram.
Explain why mixtures are examples of a physical change. Why aren’t they a chemical change? What separates a physical change from a chemical change?
Help Pleaseee!!
Answer:
This is a physical change because it's not permanent and no chemical reaction occurs. Mixtures - Mixing together materials where one is not soluble in the other is a physical change. Note the properties of a mixture may be different from its components.
Explanation:
The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water....
What are the conditions for an addition reaction?
Answer:
I don't understand
Explanation:
Answer:
Molecules containing carbon—hetero double bonds like carbonyl (C=O) groups, or imine (C=N) groups, can undergo addition, as they too have double-bond character. An addition reaction is the reverse of an elimination reaction. For instance, the hydration of an alkene to an alcohol is reversed by dehydration.
hope that helps!
Which of the following is true about Earth's supplies of freshwater?
a. Most liquid freshwater is stored in rivers and lakes.
b. Groundwater is a significant reservoir of liquid freshwater.
c. Liquid freshwater is about half of all the water on Earth.
d. None of the above.
Answer:
b
Explanation:
Groundwater is a significant reservoir of liquid freshwater is true about Earth supplies of ground water.
What is Fresh water?Freshwater refer to maturally occurring wateror frozen water containing that is supplied by the Earth which has low concentrations of dissolved salts and other total dissolved solids.
Freshwater is normally supplied by the Earth.
Therefore, Groundwater is a significant reservoir of liquid freshwater is true about Earth supplies of ground water.
Learn more about Freshwater from the link below.
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How are elements in the last column of the periodic table similar?
A. They are all solids.
O B. They are all liquids.
C. They react easily.
D. They rarely react.
Elements in the same column of the Periodic Table have similar chemical properties. So what does that mean about their valence electrons? You guessed it! Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.
Elements in the last column of the periodic table similar D. They rarely react.
How are the elements in the last column of the periodic table similar?Similarly, in the last group (column) of the Periodic Table, all of the elements have their valence electron shells filled, so they are (for the most part) un-reactive with other elements; for this reason, we call this last group the "noble gases".
How are elements in the same column of the periodic table similar?Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements.
To learn more about the Periodic Table, refer
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How is the Bohr atomic model different from the plum-pudding model?
A. In Bohr's model, the atom's mass is found at its center instead of
distributed throughout.
B. In Bohr's model, the atom's mass is mostly made up of electrons
instead of protons.
C. In Bohr's model, the volume of the atom is mostly made up of the
nucleus.
D. In Bohr's model, the atom consists of positive charges circling a
negatively charged nucleus.
Answer:
A. In Bohr's model, the atom's mass is found at its center instead of distributed throughout.
Explanation:
The Plum-Pudding model of an atom was proposed by the late J.J Thompson. In this model, an atom is seen as negative charged particles that are surrounded by a soup of positive charge, which was liken to Plum Pudding, an English dessert.
While in Bohr's model of an atom; negatively charged electrons move in clearly defined circular orbits around the atom's mass (positively charged), called Nucleus.
The Bohr's model has been consisted of the central atom's mass. Thus option A is correct.
Atom has been smallest particle of matter has been consisted of electrons, protons, and neutrons as the subatomic particle. The structure of atom has been postulated with different theories and model.
Thomson's Plum Pudding Model has been the first model for elucidating the structure of the atom.
According to Thomson, the atom has been consisted of central positive nucleus with electrons present outside the nucleus in the distributed model. The structure has been similar to English dessert Plum and has been named as Plum pudding model.
The Bohr's atomic model has been the most accepted with the nucleus has been a small entity in the atom. The electrons have been supposed to be present in the atomic orbitals, and revolves around the nucleus. The model resembles solar system.
The Bohr's model has been different from the Plum pudding model as in Bohr's model, atoms have been consisted within the orbitals consisting of negative charged electrons and are revolving around the positive nucleus.
The atomic mass of the atom has been consisted in the central nucleus. Thus, option D is correct.
For more information about the atomic model, refer to the link:
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Drag the tiles to the correct locations. Each tile can be used more than once, but not all tiles will be used. Some locations will remain empty.
Chloramine has the chemical formula NH,CI. Nitrogen has five valence electrons, each hydrogen has one valence electron, and chlorine has
seven valence electrons. Complete the Lewis structure for this covalent compound.
Answer:
A lewis structure shows the electrons on the valence shell of a molecule as dots.
Explanation:
A lewis structure refers to a structure in which dots are used to represent the electrons present on the outermost shells of the atoms comprising the bond. So stones a line is used to show a pair of electrons shared by two atoms in a covalent bond.
This system was put toward by Sir G.N Lewis in 1916 in his article titled, 'The atom and the molecule'. Lewis structures are based on the octet rule.
The image attached shows the lewis structure of chloramine. All the electrons present on the valence shell of all the bonding atoms is adequately shown in the image. There are fourteen valence electrons in the molecule as shown in the diagram. Recall that chlorine has seven valence electrons, nitrogen has five and each hydrogen atom has one valence electron each. The three lone pairs on the chlorine atom and one lone pair on the nitrogen atom is clearly shown in the image.
Please Help!
Look at the electron-dot diagram for neon in the table above. Based on the table, explain why does neon have a very high ionization energy? Please use at least ONE complete content related sentence.
Answer:
Cause the electron-dot diagram for neon is the highest: 18
Explanation:
In a single displacement reaction between Sodium Phosphate and Barium, how much of each product (in grams) will be formed from 10.0 grams of Barium? Show your work.
Answer:
14.6 g of barium phosphate
3.35 g of sodium metal
Explanation:
2Na3PO4(aq) + 3Ba(s) -------> Ba3(PO4)2(aq) + 6Na(s)
The first step in any such reaction is to but down the balanced reaction equation according to the stoichiometry of the reaction.
The two products formed are barium phosphate and sodium metal.
Number of moles of barium corresponding to 10.0g of barium = mass of barium/ molar mass of barium
Molar mass of barium = 137.327 g
Number of moles of barium = 10/137.327
Number of moles of barium = 0.0728 moles
For barium phosphate;
3 moles of barium yields 1 mole of barium phosphate
0.0728 moles yields 0.0728 moles × 1/3 = 0.0243 moles of barium phosphate
Molar mass of barium phosphate = 601.93 g/mol
Therefore mass of barium phosphate = 0.0243 moles × 601.93 g/mol = 14.6 g of barium phosphate
For sodium metal
3 moles of barium yields 6 moles of sodium metal
0.0728 moles of barium yields 0.0728 × 6 / 3 = 0.1456 moles of sodium
Molar mass of sodium metal= 23 gmol-1
Mass of sodium metal= 0.1456g × 23 gmol-1 = 3.35 g of sodium metal
does anyone know the answer?????
Answer:
In chemistry, pH (/piːˈeɪtʃ/) (abbr. power of hydrogen or potential for hydrogen) is a scale used to specify how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH.
Explanation:
that should answer ur question
HELLLPPP!
Interval Training means:
A)Incorporating a variety of exercises into your workout routine
B)Alternating short bursts of intense activity with active recovery
C)Strength training alternated with cardio exercises
D)Exercising for 10 minute periods multiple times a day
C)Strength training alternated with cardio exercises
Explanation:
Interval training is a type of training that involves a series of high intensity workouts interspersed with rest or relief periods. The high-intensity periods are typically at or close to anaerobic exercise, while the recovery periods involve activity of lower intensity.
Discribe how to prepare 50.00mL of a 3.00M hydrochloric acid solution using 12.0 M HCl.
Answer:
The answer to your question is given below.
Explanation:
To prepare 50mL of 3M HCl, we must calculate the volume of the stock solution needed. This can obtained as follow:
Molarity of stock solution (M1) = 12M
Volume of stock solution needed (V1) =?
Molarity of diluted solution (M2) = 3M
Volume of diluted solution (V2) = 50mL
The volume of the stock solution needed can be obtained by using the dilution formula as shown below:
M1V1 = M2V2
12 x V1 = 3 x 50
Divide both side by 12
V1 = (3 x 50)/12
V1 = 12.5mL
The volume of the stock solution needed is 12.5mL
Therefore, to prepare 50mL of 3M HCl, we must measure 12.5mL of the stock solution i.e 12M HCl and then, add water to the mark in a 1L volumetric flask. Now we can measure out 50mL of the solution.
Tansition elements form:
A) colorless ions in solution, multiple positive
oxidation states
B) colorless ions in solution, multiple negative
oxidation states
C) colored ions in solution, multiple positive
oxidation states
D) colored ions in solution, multiple negative
oxidation states
**Please I need it fast**
When an electron of a hydrogen atom travels from n = 4 to n = 2, a photon of energy 4.165 × 10-19 joules is released. Calculate the wavelength associated with this radiation.
Answer:
Explanation:
please delete this it was a mistake
Answer:
4.77 × 10-7 meters
Explanation:
Energy of photon, E = hν
Frequency of photon,
Thus, energy of photon,
Therefore, 4.165 × 10-19 joules =
λ =
λ =
λ = 4.77 × 10-7 meters
The frequency of a photon having energy of 4.165 × 10-34 joules is 4.77 × 10-7 meters.