Answer:
The answer is C
Explanation:
A sealed container is heated from 110K to 175K. The gas begins at a volume of 95L, what is the new volume of the gas upon heating?
Calcule el volumen de disolución de LiOH a 3.5 M, necesario para neutralizar una disolución de 25 ml de H2SO3 cuya densidad es de 1.03 g/ml y su riqueza del 60%. (60 PTS.) Alguien puede ayudarme con esto porfabor
Respuesta:
0.11 L
Explicación:
Paso 1: Escribir la ecuación balanceada
2 LiOH + H₂SO₃ ⇒ Li₂SO₃ + H₂O
Paso 2: Calcular la masa de solución de H₂SO₃
25 mL de solución de H₂SO₃ tiene una denisdad de 1.03 g/mL.
25 mL × 1.03 g/mL = 28 g
Paso 3: Calcular la masa de H₂SO₃ en 26 g de Solución de H₂SO₃
La riqueza de H₂SO₃ es 60%, es decir, cada 100 g de solución hay 60 g de H₂SO₃.
26 g Sol × 60 g H₂SO₃/100 g Sol = 16 g H₂SO₃
Paso 4: Calcular los moles correspondientes a 16 g de H₂SO₃
La masa molar de H₂SO₃ es 82.07 g/mol.
16 g × 1 mol/82.07 g = 0.19 mol
Paso 5: Calcular los moles de LiOH que reaccionan con 0.19 moles de H₂SO₃
La relación molar de LiOH a H₂SO₃ es 2:1. Los moles de LiOH que reaccionan son 2/1 × 0.19 mol = 0.38 mol.
Paso 6: Calcular el volumen de solución de LiOH
0.38 moles de LiOH están en una solución 3.5 M. El volumen requerido es:
0.38 mol × 1 L/3.5 mol = 0.11 L
What can lead to being curious and also lead to fascinating scientific investigations? a. Questions b. Answers c. Qualitative Measurements d. Quantitative Measurements
Answer:
Questions
Explanation:
The word "science" was obtained from the Latin word "Scire" which means "to know". Hence science is a systematic investigation into the nature of the universe.
Scientific investigations begin with asking questions about the universe. It is this curiosity to know about occurrences in the universe as well as how to solve problems in the universe that leads to fascinating scientific investigations and discoveries.
How many grams are in 5 mols of KOH
Answer:
0.08911760029829444
Explanation:
hop that this what you wanted
Can someone please help
Answer:
1. c) shiny
2) True. Reactivity is a chemical property.
1. A metal is shiny
2. yes
that's all
help please. its over dilutions in chemistry
Answer:
The molarity of the solution is given as 0.15 M. This means that it contains 0.15 moles of NaOH in 1 liter of solution.
hope this helps you☺️☺️
Describe how ultrasonic waves help ships navigate and how ultrasonic waves can be used for medical purposes
How many formula units are there in 1.34 moles of Lithium Bromide (LiBr)? (write your answer in scientific notation).
Answer:
8.07×10²³ units
Explanation:
6.02×10²³×1.34
8.07×10²³ units
Why is it necessary to know the temperature of the reactants and the products of a reaction in order to determine change in the Gibbs free energy of the reaction
Answer:
Free Energy (G) can either increase or decrease for a reaction when the temperature increases. It depends on the entropy (S) change. The change in a quantity is represented by the Greek letter delta. ... Hence, when the temperature increases the numeric value of the free energy becomes larger.
Explanation:
The change in Gibbs free energy (ΔG) of a chemical reaction depends on the initial and final states of the reactants and products, as well as on the temperature and pressure conditions of the reaction.
What is Gibb's free energy?The Gibbs free energy of a reaction tells us whether a reaction is spontaneous or not under given conditions, with negative ΔG values indicating a spontaneous reaction and positive ΔG values indicating a non-spontaneous reaction.
The temperature of the reactants and products is important in determining the Gibbs free energy change because the Gibbs free energy change is related to the enthalpy change (ΔH) and the entropy change (ΔS) of the reaction through the equation:
ΔG = ΔH - TΔS
where T is the temperature in Kelvin.
Thus, the temperature of the reactants and products must be known in order to calculate the Gibbs free energy change of a reaction accurately.
To learn more about the Gibb's free energy, follow the link:
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Name the gases that mostly compose the atmosphere.
O Argon and Carbon Dioxide
O Oxygen and Carbon Dioxide
Oxygen and Nitrogen
Carbon Dioxide and Nitrogen
Explanation:
Oxygen and Nitrogen. is the correct pair.
Explain why, if soil on a vehicle is in a clump, care
should be taken to keep the clump intact.
Answer:
it could harbor dangerous chemicals that damage the car if released
it could be holding parts together
it could have something dangerous inside
What happens with electrons in a non-polar bond?
Brainliest!!!!!!!
Answer:
In a nonpolar covalent bond, the atoms share electrons equally with one another.
Explanation:
Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecule.
What is the poh of a solution with a ph of 1.30? PLZZ ANSWER
Answer:
12.70
Explanation:
Your friend says, “chemical changes are caused by an input in energy. In physical changes, there is no transfer of energy” is your friend correct? Why or why not?
Answer: Your friend is incorrect.
Explanation: If we have an object or something that isn’t moving, (let’s say a notebook on a desk). If there is change, and the notebook moves, there is acceleration. Force = Mass times acceleration, f = m*a. There has to be a force, first of all. If you touched the notebook and moved it, some of your energy is transferred and now the notebook has kinetic energy. If our system is you and the notebook, the total energy doesn’t change. the energy is transferred, but doesn’t change. Your friend is not correct. Please give brainliest hope this helped!
SOMEONE PLEASE HELP ME ON THIS QUESTION ASAP!!! NO LINKS
Answer:
as for my answer is C.....
how does dipping an iron bucket in Molten zinc protect it?
Answer:
It forms a barrier that prevents corrosive substances from reaching the underlying steel or iron. The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc. The zinc protects its base metal by corroding before iron.
Explanation:
Answer:
It protects it from corrosion.
Explanation:
Zinc protects iron and steel from the relentless forces of corrosion. Galvanizing iron and steel by dipping them in molten zinc creates an alloy that can, in the right environmental conditions, protect the iron or steel beneath it for 100 years or more.
can someone pleaze help me
Answer:
I think its the last one
Explanation:
Super sorry if its incorrect.
Where are Gold, Limestone and kaiolin found.
6. A container has a volume of 53.9 L. Assuming it is at STP, how many moles of gas particles does it contain?
Answer:
2.41 mol
Explanation:
53.9 L x 1 mol/22.4 L = 2.41 mol
A kicked soccer ball
eventually comes
to rest. What
force causes
this?
ce
Answer:
friction
Explanation:
jwjwkkskskaksksk
can alluminium sulphate or carbonate test the purity of water
Explanation:
When added to water, aluminum sulfate causes microscopic impurities to clump together into larger and larger particles. These clumps then settle to the bottom of the container and can be filtered out. This makes the water safer to drink
,
What is the H+ ion concentration of a solution with a pH of 7?
Answer:
10-7mol/l
Explanation:
Answer: 10-7mol/l
Explanation:
BRAINS
explain what is meant by an exothermic reaction and write balanced equation for any two exothermic changes
Please do not answer from links
Please answer correctly
Urgent
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \red{ \underline{ \large \orange{\tt{ ꧁ A \: N\: S \: W \: E \: R ꧂}}}}[/tex]
✧ [tex] \large{ \red{\tt{E\:X \: O \: T \: H \: E \: R \: M \: I \: C \: \: R \: E \: A \: C \: T\: I \: O \: N}} : }[/tex]
☃ The chemical reaction in which heat is released to the surroundings is called exothermic reaction. The amount of heat energy released is written along with products. This indicates that heat is given out.
[tex] \pink{ \text{Any \: two \: balanced \: equation \: for \: Exothermic \: changes}} : [/tex]
C + O₂ ⇾ CO₂ + HeatCaO + H₂O ⇾ Ca ( OH )₂ + Heatツ Hope I helped! ♡
☂ Have a wonderful day / night ! ☄
[tex] \underbrace{ \overbrace{ \mathfrak{Carry \: On \: Learning}}}[/tex] ✎
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
Which of the following are solutions?
Choose more than one if needed
1. Gas dissolved in a liquid
2. Liquid dissolved in a liquid
3. Solid mixed with solid
4. Solid dissolved in a liquid
Answer:
3
Explanation:
How do we designate recessive
genes?
A. They are male.
B. They are lower case letters.
C. They are female.
D. They are capital letters.
Un elemento hipotético posee un número másico igual 45 y en estado neutro (sin carga), tiene 22 electrones. Indicar el número de neutrones que posee dicho elemento hipotético:
Answer:
23 neutrones.
Explanation:
Bajo el modelo atómico actual, los átomos están hechos de neutrones (Particulas sin carga y número másico de 1), electrones (Partículas con carga de -1 y número másico de 0) y protones (Partículas con carga de +1 y número másico de 1).
El elemento contiene 22 electrones y carga neutra. Esto significa que contiene igual número de protones:
22 protones.
Como el número másico es de 45 y los protones aportarán solo 22 de número másico, el elemento debería tener:
23 neutrones para completar así, el número másico.
The molarity of a solution that contains 28 g KOH (molar mass 56 g/mol) per 250 mL of solution is:
Which term describes the molecule shown below?
H-C=C-H
ethyne CxHy
A. Unsaturated alkene
B. Unsaturated alkyne
O C. Saturated alkyne
O D. Saturated alkene
Answer:
Saturated alkyne
Explanation:
The hydrocarbons are known as the compounds which is made up of only carbon and hydrogen atoms. They may be saturated or unsaturated based on the number of bonds present. The molecule H-C≡C-H is an Unsaturated alkyne. The correct option is B.
The hydrocarbons in which the carbon and hydrogen atoms are connected through double or triple bonds are known as unsaturated hydrocarbons. Here ethyne is an unsaturated hydrocarbon.
Ethyne is an alkyne which have the C-C and C-H atoms connected through triple and single bonds.
Thus ethyne is option B.
To know more about Unsaturated hydrocarbons, visit;
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A majority of the world's electricity comes from water power.
True
False
Answer:
True.
Explanation:
A material in which electrons are able to move easily or freely is a(n)
A none of these
В electric field
C insulator
D conductor
Answer:b
Explanation: