Answer:
B) n2=V2N1/V1
the second part is 0.080
Explanation:
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The volume and number of moles of a gas are in direct proportion. Hence, as the volume increases from 5 ml to 1 L, number of moles increases from 0.040 to 8 moles.
What is Avogadro's law?Avogadro's law, states that, at constant pressure and temperature, the number of moles of a gas is directly proportional to the volume of the gas. Hence,
V1/n1 = V2/n2, for two different volumes.
Given that, v1 = 5 ml
v2 = 1 L = 1000 ml
n1 = 0.040 mol
then n2 = v2 n1/ v2
Number of moles at 1 L = (0.040 mol × 1000 ml)/5 ml = 8 moles.
Hence, the number of moles of the gas added = 8 - 0.040 = 7.96 moles.
Therefore, the amount of gas added at the increased volume is 7.96 moles.
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A scientist studies the bond energies of different compounds containing nitrogen (N). The scientist observes that the N–N bonds in one group of compounds have a bond energy of 209 kJ/mol, while the N–N bonds in another group of compounds have a bond energy of 418 kJ/mol. In one or two sentences, postulate a reason for this difference
The first case has N-N single bond has the second case has N-N double bond.
What is bond energy?The term bond energy is referred to as the energy that is released when a bond is formed it is equal to the energy that is required to break the bond.
In the first case, the N-N bond has an energy of about 209 kJ/mol indicating that it must be a single bond. The second case has a bond energy of 418 kJ/mol indicating that it is an N-N double bond.
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Answer:
Explanation:
The difference in bond energies of N–N bonds in different compounds could be due to the presence of different chemical groups around the nitrogen atoms. These chemical groups can influence the bond strength between the nitrogen atoms, causing the bond energy to vary. Additionally, different bonding arrangements, such as single or double bonds, could also contribute to the difference in bond energy.
Please please helppp
Answer:
is that geography because that is my favourite subject... I can help
Do you think aerodynamics is MORE important or LESS important in CO2 cars compared to regular pinewood derby cars?
Answer:
more
Explanation:
bc it makes science so I hope you get it tight.
Based on the table above, oil would transfer heat the best because its specific heat is the
Answer:
Based on the table above, sesame oil would transfer heat the best because its specific heat is the lowest.
Explanation:
Edge 2022
will mark as brainliest if correct
Answer:
A) The bonds of the reactants must be broken
D) The bonds of the products must be formed
E) Breaking bonds require an input of energy
H) Forming bonds releases energy
These are all the 4 correct statements
Explanation:
Breaking bonds is an ENDOTHERMIC process, meaning that it takes in energy to break the bonds of the reactants.
Forming bonds is an EXOTHERMIC process, meaning that it takes in energy to break the bonds of the reactants.
Explain the properties of metals by completing the following sentences, The of transition metals ncreases as the number of delocalized electrons Because the in metals are strongly attracted to the delocalized electrons in the metal, they are not easily from the metal causing the metal to be very Alkali metals are than transition metals because they have only per atom The of metals vary greatly. The melting points are not as extreme as the It does not take an extreme amount of energy for to be able to move past each other. However, during atoms must be separated from a group of which requires a lot of Copyright McGraw-Hill Education Light absorbed and released by the in a metal accounts for the of the metal,
The high melting and boiling point of metals is due to the attraction between the delocalized electrons and the positive ions in metallic bonding.
What are metals?Metals are mostly hards and shiny solid elements which forms ions by loss of electrons.
Metals are found in group 1, 2 and 3 of the periodic table of elements.
Transition metals are found in the d- and f-block of the periodic table.
The melting and boiling point of transition metals increases as the number of delocalized electrons increases.
Because the positive ions in metals are strongly attracted to the delocalized electrons in the metal, they are not easily removed from the metal causing the metal to be very hard, malleable and ductile.
Alkali metals are more reactive than transition metals because they have only one valence electron per atom
The boiling points of metals vary greatly.
The melting points are not as extreme as the boiling point. It does not take an extreme amount of energy for atoms to be able to move past each other. However, during boiling, atoms must be separated from a group of which requires a lot of energy.
Light absorbed and released by the electrons in a metal accounts for the luster of the metal.
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Which of these compounds would you expect
to contain covalent bonds? Why?
a. KCI
b. PBr3
c. CIBr
d. Nal
which of the following elements is the most reactive between boron, sulfur, and chlorine
Answer:
Chlorine would be the answer
Explanation:
What is an enzyme and how does it affect a chemical reaction?
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Answer: Enzymes are catalysts which will lower the activation energy of a chemical reaction. Activation energy is the energy needed to get a reaction going. By lowering the amount of energy needed to start a reaction, the reaction can go more quickly.
What is observed in aqueous mixture of zinc chloride and silver nitrate
Calculate the number of atoms in a 3.31 x 10 g sample of lithium.
g
Explanation:
atomic mass of Li = 7 amu
so we know that there are about (33.1)/7 = 0.47 mol
Multiply this by 6.02 * 10^23 particles per mol, and we get about 2.83 * 10^23 particles
Which of the following is a polyatomic ion?
A.) Chloride, Cl−
B.) Nitrate, NO3 −
C.) Carbon dioxide, CO2
D.) Iron(III), Fe3+
What was the chemical purpose of heating the MnSO4⋅H2O? Why is this procedure important?
The chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.
Dehydration reactionsDehydration reaction is a type of chemical reaction that involves the removal of water which would eventually lead to the formation of a new compound.
The molecule of MnSO4⋅H2O contains a molecule of water(H2O). After heating of the molecule, water is lost giving rise to the dry compound MnSO4.
Other examples of dehydration reactions are:
Reactions that produce acid anhydrides.Reactions that involve the production of polymers.Reaction of sucrose with concentrated sulfuric acidTherefore, the chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.
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HELP PLEASE :D
(science)
For the first drop down its: Friction,gravity, normal force,push
Thanks
[tex]\bold{Heya~!}[/tex]
For the first drop down.
Your answer will be is :
C. Normal force.And, the second drop down.
Your answer will be is :
Hope It Helps ! ~
#LearnWithBrainly
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Jace ~
What is the definition of a reducing agent?
Answer:
a substance that tends to bring about reduction by being oxidized and losing electrons.
Answer:
a substance that reduces a chemical compound usually by donating electrons.
Look at the diagram below , which shows gas particles in a container. If the piston was lowered, so that the size of the container decreases, what would happen to the pressure? Explain your reasoning. In your explanation, include which gas law (Boyle's law, Charles' law, or Gay-Lussac's law) this involves.
The pressure of the gas is expected to increase in accordance to Boyle's law.
What is Boyle's law?Boyle's law states that, the volume of a given mass of gas is inversely proportional to its pressure at constant temperature.
By implication, when the piston is lowered and the volume of the gas is decreased, the pressure of the gas is expected to increase in accordance to Boyle's law.
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Draw the orbital diagrams of the valence orbitals of tantalum when it bonds with the following ligands. Indicate clearly how each ligand brings electrons into the metal orbitals. ( 8 Marks) (a) Three chloride ions (b) A singlet carbene (c) A triplet carbene (d) Ethene
Orbital diagrams are diagrammatic representations of the arrangement of electrons in an atom.
What are orbital diagrams?Orbital diagrams are diagrammatic representations of the arrangement of electrons in an atom. The element Tantalum is a transition element of the third row.
1) When three chloride ions attach to Ta^2+, the three 5d orbitals are involved.
2) When Ta^2+ bonds to a singlet carbene, the 6s orbital is used.
3)When Ta^2+ is bonded to a triplet carbene, the outer 6p orbitals
4) When Ta^2+ is bonded to ethene the outer 6p orbitals.
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It is almost time to explain to the people of Westfield how the rust in their water formed. What have
you learned so far about how new substances form?
Explanation:
its asking how will you explain to the people on what made the water rust? what have you learned about how water rust in your class? just explain it what you already know!!
the mass of one mole of sulfur is
Aspirin, C9H8O4, slowly decomposes at room temperature by reacting with water in the atmosphere to produce acetic acid, HC2H3O2, and 2-hydroxybenzoic acid, C7H6O3 (this is why old bottles of aspirin often smell like vinegar):
Based on the chemical reactivity, the decomposition of aspirin in the presence of water produces acetic acid and 2-hydroxybenzoic acid.
What is a decomposition reaction?A decomposition reaction is a reaction in which a large substance is broken down into smaller substances.
Example of a decomposition reaction is the decomposition of aspirin to produce acetic acid.
Aspirin (C9H8O4) slowly decomposes at room temperature by reacting with water in the atmosphere to produce acetic acid, HC2H3O2, and 2-hydroxybenzoic acid, C7H6O3.
The equation of the reaction is given below:
C9H8O4 + H2O -----> HC2H3O2 + C7H6O3Therefore, the decomposition of aspirin produces acetic acid and 2-hydroxybenzoic acid.
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2. Barium compounds are chemically very similar to strontium compounds. Water-soluble
compounds of both are toxic, but to different degrees. An antidote for barium chloride
poisoning is to orally administer 30 grams of sodium sulfate in 250 mL of water. Explain the
chemical basis for this antidote.
The ability of sodium sulfate to act as an antidote to barium chloride poisoning is because displaces barium in barium chloride to form sodium chloride and insoluble harmless barium sulfate.
Why is a solution of sodium sulfate used as an antidote?The ability of sodium sulfate to act as an antidote to barium chloride poisoning is because of the reactivity of sodium.
Sodium is a more reactive metal than barium, so it displaces barium in barium chloride to form sodium chloride and insoluble harmless barium sulfate.
The equation of the reaction is given below:
BaCl2 + Na2SO4 ----> BaSO4 + NaClTherefore, the ability of sodium sulfate to act as an antidote to barium chloride poisoning is because displaces barium in barium chloride to form sodium chloride and insoluble harmless barium sulfate.
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There are different kinds of poisonings. Sodium sulfate are known to be an effective antidote because they create or produce a kind of precipitate with barium that is said to be not easily absorbed from the gastrointestinal tract.
There have been a lot of Cases of barium poisoning that are known to be followed by high hypokalemia.Soluble sulfates such as sodium sulfate and others such as potassium infusion are known to be a key antidote.
If given promptly and in the right dosage, soluble sulfates are known to be an effective antidote.
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Suppose that a person eats a diet of 2398 Calories per day.
Convert this energy into joules.
Convert this energy into kilojoules.
Convert this energy into kilowatt-hours.
Answer:
10,033,232 joules
10,033.232 kilojoules
2.78837209 kilowatt-hours
Explanation:
2398 * 4184 =
2398 * 4.184 =
2398 / 860 =
the line of best fit is v = t +
Answer:
So we're going to use our slope formula y2. Minus y1 over x2 minus x1 that's five minus negative three over X 2 minus X 1 that's seven minus 1 so that gives us 6. And this gives us 8 which equals 4/3.
Explanation:
Answer:
THE LINE OF BEST FIT
V = 0.003 OR .003
T = 0.003 OR .003
Explanation:
V and T are DIRECTLY PROPORTIONAL
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P.S This was a struggle question for me too but this answer is right!
Fe2+(s) + Cr6+(aq) → Fe3+(aq) + Cr3+(aq)
Which element is being reduced?_______
Which element is being oxidized?_______
Which reactant is the reducing agent?_______
Which reactant is the oxidizing agent?_______
Explanation:
A. Cr reduced
B. Fe oxidized
C. Fe reducing agent
D. Cr oxidizing agent
[tex]ok \: here \: is \: your \: answer \: [/tex]
1) Cr is being reduced.
2) Fe is being oxidized.
3) Fe is the reducing agent.
4) Cr is the oxidizing agent.
100 points+Brainliest for correct answer
An electron on an energy level has an energy of 16.32 x 10−19 J. It moves to another level by releasing 5.4 x 10−19 J of energy. Which of the following descriptions mostly likely explains what occurred?
The electron moved down to an energy level and has an energy of 10.92 x 10−19 J.
The electron moved down to an energy level and has an energy of 21.72 x 10−19 J.
The electron moved up to an energy level and has an energy of 10.92 x 10−19 J.
The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
Answer:
O Option 1
Explanation:
IF ENERGY IS RELEASED, THEN ENERGY RELEASED SHOULD BE SUBTRACTED FROM ORIGINAL.
(16.32 X 10^-19) - (5.4 X 10^-19)
10.92 X 10^-19
Two escalators move people up and down between floors of a shopping mall at the same rate, either up or down. What of the following statements regarding the motion of escalators is true?
Answer:
Velocity can vary when speed is constant
The liquid and solid state exist because of:
Answer: Its B
Explanation:
An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm3, what is the mass of
74.2 mL of ethyl alcohol?
O a. none of these
O b.58.6 g
O c.93.9 g
O d. 7.90 g
Oe. 10.6 g
Answer:
b) 58.6
Explanation:
1ml = 1cm³
74.2 x 0.790 = 58.618g
The Haber-Bosch process operates at reaction pressures of 200.0
atm and higher. What is this pressure in psi? fill in the blank
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A bike moves with a speed of 40 km/h for 1 h and then with a speed of 60 km/h for the next 2 h. What is the total distance covered by the bike during the complete journey?
Answer:
40×1=40
60×2=120
40+120=160