Answer: The heat energy absorbed by the glass window is 84420 J.
Explanation:
Given: Mass = 15.0 kg (1 kg = 1000 g) = 15000 g
Specific heat capacity = [tex]0.840^{o}C[/tex]
Initial temperature = [tex]20^{o}C[/tex]
Final temperature = [tex]26.7^{o}C[/tex]
Formula used to calculate heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat capacity
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 15000 g \times 0.840J/g^{o}C \times (26.7 - 20.0)^{o}C\\= 84420 J[/tex]
Thus, we can conclude that heat energy absorbed by the glass window is 84420J.
Which of the following has the most energy?
heat
ultraviolet rays
the color blue
radio waves
Answer:
C
Explanation:
What is the value for AG at 300 K if AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
O
A. AG = 54 kJ/mol
O
B. AG=-18 kJ/mol
O
C. AG= 0 kJ/mol
O
D. AG = 27 kJ/mol
Answer:
0 kJ/mol
Explanation:
Step 1: Given data
Enthalpy change (ΔH): 27 kJ/molEntropy change (ΔS): 0.09 kJ/mol.KAbsolute temperature (T): 300 KStep 2: Calculate the Gibbs free energy change (ΔG)
We can calculate the Gibbs free energy change using the following expression.
ΔG = ΔH - T × ΔS
ΔG = 27 kJ/mol - 300 K × 0.09 kJ/mol.K = 0 kJ/mol
Since ΔG = 0 kJ/mol, the process in not spontaneous nor non-spontaneous.
A 3.0 g sample of a gas occupies a volume of 1.00L at 100C and 740 torr pressure. The molecular weight of the
(Give the same ANSWER for the next TWO problems)
gas is
Answer:
94.2 g/mol
Explanation:
Ideal Gases Law can useful to solve this
P . V = n . R . T
We need to make some conversions
740 Torr . 1 atm/ 760 Torr = 0.974 atm
100°C + 273 = 373K
Let's replace the values
0.974 atm . 1 L = n . 0.082 L.atm/ mol.K . 373K
n will determine the number of moles
(0.974 atm . 1 L) / (0.082 L.atm/ mol.K . 373K)
n = 0.032 moles
This amount is the weigh for 3 g of gas. How many grams does 1 mol weighs?
Molecular weight → g/mol → 3 g/0.032 moles = 94.2 g/mol
A solution of copper(II) chloride is added to a solution of sodium sulfide.
Write a balanced equation, and explain what type of reaction occurred and/or how you determined that a reaction occurred. Don't use solubility rules.
Answer:
a,morunoxidice
Explanation:
carbon - tranite>plangose ,finite, finite,MARETE
why does solid silver, Ag, conducts electricity while solid silver chloride, AgCl, does not.
Answer: A solid silver, Ag, conducts electricity because it contains ions or electrons while solid silver chloride, AgCl, does not conduct electricity because AgCl does not dissociate to give ions or electrons.
Explanation:
Solid silver (Ag) is considered to be a good conductor of electricity because there are more number of free electrons or movable atoms are present in it.
As electricity is the flow of ions or electrons. So, more is the number of ions or electrons present in a substance more will be its conductivity.
Whereas solid silver chloride is a precipitate that is insoluble in water and therefore, it will not give ions or electrons.
As a result, silver chloride is not able to conduct electricity.
what is the molarity of a solution prepared dissolving 317 g of CaCl2 into enough water to make 2.50 L of solution?
Answer:
1.14 M
Explanation:
Step 1: Calculate the moles corresponding to 317 g of calcium chloride (solute)
The molar mass of calcium chloride is 110.98 g/mol.
317 g CaCl₂ × 1 mol CaCl₂/110.98 g CaCl₂ = 2.86 mol CaCl₂
Step 2: Calculate the molarity of the solution
Molarity is equal to the moles of solute divided by the liters of solution.
M = moles of solute / liters of solution
M = 2.86 mol / 2.50 L = 1.14 mol/L = 1.14 M
Which of the following factors affects the amount of heat absorbed by a substance?
A. Boiling point of the substance
B. Specific heat capacity of the substance
C. Melting point of the substance
D. Shape of the substance
Answer:
The correct answer is B, "Specific heat capacity of the substance."
Explanation:
I just took the test. I hope this helps!
Heat absorbed changes the bonds of the molecules or the compounds to alter their state. The specific heat capacity affects the amount of heat absorbed. Thus, option B is correct.
What is specific heat capacity?Specific heat capacity is defined as the amount of heat or energy absorbed by the kilogram of the solid reactant when the system experiences a rise in temperature. It is measured in J/(kg K) or J/(kg °C).
The specific heat capacity, the mass of the substance, temperature, and the phase of the substance affects the absorption of the heat from the surrounding. The specific heat affects absorption as it tells about the substance's ability to take the heat energy.
Therefore, specific heat capacity affects heat absorption.
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En una botella hay 2x10 25 moléculas de vinagre puro ¿Cuántos mol y cuántos gramos de esta sustancia habrá en la botella?
Answer:
33.2 moles y 1994 gramos.
Explanation:
¡Hola!
En este caso, dado que es posible para nosotros relacionar moles con gramos por medio de la masa molar y moléculas con moles por medio del número de Avogadro, resulta factible para nosotros primero calcular las moles en las moléculas dadas y de esta manera luego calcular los gramos, teniendo en cuenta una masa molar de 60.05 g/mol ya que el vinagre se puede estudiar como ácido acético (CH3COOH):
[tex]2x10^{23}molec*\frac{1mol}{6.022x10^{23}molec}=33.2mol[/tex]
Seguidamente, calculamos los gramos:
[tex]33.2mol*\frac{60.05g}{1mol}=1994g[/tex]
¡Saludos!
Add coefficients to balance the equation to make water.
H2(g) +O2 (g)H20 (1)
Answer:
2H2+2O2=2H2O
Explanation:
hope this helps
Determine the empirical formula of a compound containing 0.57% hydrogen, 72,1% Todine, and 27.3\% oxygen.
Is sulfur pentoxide a ionic or covalent bond?
TEACH ME how to do question 2 through your explanations.
Answer:
Explanation:
The first two are easy:
H2O, H3O+ and OH- all exist in an equilibrium
[H3O+] = [OH-] = 10^-7 M
HCl is a strong acid so 1M of it will disassociate completely
[H3O+] = [Cl-] = 1 M
The third one is also an equilibrium as HNO2 is a weak acid. Ka is given so [HNO2] and [NO2-] can be calculated.
The fourth one is a buffer solution so its pH can be looked up to give the concentrations.
Answer:
Explanation:
H20 has pH of 7
1st reaction [H30+] = 10^-7M
[OH-] = 10^-7M
1M HCl has pH of 0
2nd reaction [H3O+] = 1M
[Cl-] = 1M
given Ka = 4.6x10^-3 = [H3O+]x[NO2-] / [HNO2]
and [HNO2] + [NO2-] = 1M
each concentration can be solved
beaker D is a buffer solution n requires more info 2 solve
How many protons, neutrons, and electrons are found in a neutral atom of hydrogen-333?
Answer:
Explanation:
A hydrogen atom has an atomic number of 1.
So it's proton number will always be 1.
A neutral hydrogen atom does not have any charge.
So it has the same amount of electrons as protons, which turns out to be also 1.
A neutral hydrogen atom has an atomic mass of ≈
1.00794 amu ≈ 1 amu.
To find the amount of neutrons, we take the proton number and subtract it from the mass number.
1 − 1 = 0
So a neutral hydrogen atom has no neutrons.
In summary,
A hydrogen atom has
1 proton
1 electron
0 neutrons
I hope that helps!
On the bottom beam of the triple beam balance, each small division stands for
A.) one centimeter
B.) one milliliter
C.) one gram
D.) one-tenth of a gram
Answer:
Hello There!!
Explanation:
I believe the answer is D.) one-tenth of a gram.
hope this helps,have a great day!!
~Pinky~
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
D.) one-tenth of a gram
Thanks.Hope it helps.How do ecosystems change overtime
Answer:
Ecosystems, the interactive system of living and nonliving organisms in a specific location, change slowly over time. When new plants and animals arrive in an area, they either thrive or struggle. Thriving species sometimes displace native species. When this happens, the system as a whole begins to change.
A nebula is often made up of hydrogen and helium gases.
True
False
Answer:
Nebulae are made of dust and gases—mostly hydrogen and helium. ... Eventually, the clump of dust and gas gets so big that it collapses from its own gravity. The collapse causes the material at the center of the cloud to heat up-and this hot core is the beginning of a star.
Explanation:
Hope this helps
Which of these is not an organ in the
digestive system?
A. heart
B. stomach
C. intestine
Answer:
a
Explanation:
organs are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system. The small intestine has three parts.
is zinc an example of a element or compound?
Answer:
Zinc is an element.
Explanation:
Compounds are composed of two or more elements
Answer:
element
Explanation:
zinc is an element with atomic number 30
What is natural gas and how does it work
Answer:
Natural Gas is a fossil energy source that formed deep beneath the Earth's surface. It is used in power plants to generate electricity by burning natural gas as their fuel.
Explanation: I hope this helped :)
Answer:
A molecule of natural gas is made up of carbon and hydrogen. When the hydrogen is segregated from the carbon and filled into a fuel cell, it fuses with oxygen to produce water, electricity, and heat. The carbon is released as carbon dioxide in smaller quantities than from gas turbines.
Explanation:
This is the site I got the info from :
How Natural Gas Works | Peak Oilhttps://www.peakoil.net › non-renewable › how-natural-g
In the buffer solution CH3COsH(aq) -> H3O+(aq) + CH3CO2-(aq)
A. H3O+ is an acid, and CH3CO2H is its conjugate base.
B. CH3CO2H is an acid, and CH3CO2- is its conjugate base.
C. H3O+ is an acid, and CH3CO2- is its conjugate base.
D. CH3CO2H is a base, and H3O+ is its conjugate acid
In the buffer solution CH₃COOH (aq) ---> H₃O⁺(aq) + CH₃CO₂⁻(aq):
CH₃CO₂H is a base, and H₃O⁺ is its conjugate acid.
Option D is correct.
What is an acid?An acid is described as a molecule or ion capable of either donating a proton, known as a Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid.
From the buffer solution above, H₃O⁺ is the conjugate acid because it donates a proton (H⁺) to a base CH₃CO₂H.
In conclusion, A conjugate acid, within the Brønsted–Lowry acid–base theory, is described as a chemical compound formed when an acid donates a proton (H⁺) to a base.
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2.3g of lithium chloride in 500cm3 of solution
Answer:
0.109M
Explanation:
Find molarity of the solution:
Molarity is defined as the ratio between the moles of the solute (Lithium Chloride in this case) per liter of solution. To solve this question we have to find the moles of LiCl and its volume as follows:
Moles LiCl -Molar mass: 42.394g/mol-
2.3g * (1mol / 42.394g) = 0.0543 moles
Volume in liters:
500cm³ * (1L / 1000cm³) = 0.500L
Molarity:
0.0543 moles / 0.500L =
0.109M
PLESE HELP WILL GIVE BRAINLYESTY
Imagine that you are Andreas Vesalius. Write a short autobiographical statement that talks about who you are, where you’re from, and some of your important contributions.
Answer:
My name is Andreas Vesalius and I'm a 16th-century Flemish anatomist, physician, and author of one of the most influential books on human anatomy, De Humani Corporis Fabrica Libri Septem. I am often referred to as the founder of modern human anatomy. I was born in Brussels, December 31, 1514 which was then part of the Habsburg Netherlands. I was a Flemish doctor who was notable for my contribution to the science of anatomy of the human body. I was the first to perform public dissection on a human corpse, a practice that was unusual in the Middle Ages due to spiritual beliefs.
Explanation:
In order to tell the difference between microwaves and visible light in the blue range, which of the following measurements should be made?
Answer:
microwaves should be made
Answer:
answer choices plzzzzz
ima edit my answer wht are the choices
Explanation:
mrk mE BRAINLIEST PLZZZZZZZZZZZz
Please help this is due today! 5-11-2021
Observe the chemical reaction below, and identify if the equation is balanced or not. If it is not balanced, then what coefficient should you place for the reactants and products? Justify with scientific reasoning.
Mg + O2---------> MgO
Make sure to include the following details in your answer in complete sentences:
- Is the chemical reaction balanced?
- Is it following the law of conservation of mass, why is not following?
- What can you do to make sure that the equation becomes balanced and follow the law?
Answer:
- The chemical reaction is not balanced. There is two oxygens on the reactant's side while there's only one oxygen on the products side.
- I would not say it's following the law of conservation of mass as it's not a balanced equation.
- To balance this equation, you would need to add the coefficient of '2' to Magnesium (Mg) on the reactants side, and add the coefficient of '2' to the products side. This would make it so that there's 2 Mg's and 2 O's on both the reactant's side and products side.
edit: I hope this helped you in some way. ^^
Convert 444 cal to joules
Answer: 1
Decimal Answer: 1.858
Using a Punnett square, what genotypes would you expect in the F2 offspring?
F1 generation
F2 (option A)
F2 (option B)
Father
Father
Father
A
A
A
A
A
a
Mother
Mother
Mother
a
Аа
«Аа
a
Аа
Аа
А
AA
Аа
a
Аа
Аа
a
Аа
Aai
aa
a
А
Answer:
can you answer mine i will help you! please
Explanation:
A pacemaker:
A. sends electrical impulses to a prosthesis, causing it to move
through brain signals.
B. measures the distance traveled with a prosthetic leg.
C. tracks the speed traveled with a prosthetic leg and adjusts
movements accordingly.
D. sends electrical impulses to the heart, causing it to beat more
regularly
SUEMIT
help me pass this test my last day of school is may 26 if you don’t mind I have more questions :)
Answer:
equal
Explanation:
Ann is studying acid base neutralization reactions and mixes sodium hydroxide and hydrochloric acid. The reactants were clear,
colorless solution and mixing them produces a clear, colorless final solution and the beaker becomes warm. She knows this reaction
forms liquid water and an aqueous salt based on the neutralization rules as shown by the chemical equation. What physical evidence
indicates that there has been a chemical rea
NaOH(aq) + HCl(aq) - NaClaq) + H2 °C)
图 40)
A)
The solution changes color.
B)
Precipitate formation occurs.
C)
The beaker changes temperature.
D)
Gas bubbles form during the reaction.
Answer:C
Explanation:
Got it right in usatestprep
The physical evidence that indicates that there has been a chemical reaction is that the beaker changes temperature and the correct option is option C.
What is Neutralization reaction?
Neutralization is a chemical reaction in which acid and base react to form salt and water. Hydrogen (H⁺) ions and hydroxide (OH⁻ ions) react with each other to form water.
The strong acid and strong base neutralization have a pH value of 7.
The beaker gets warm which indicates that the reaction between acid and base is an exothermic reaction releasing heat energy into the surroundings.
Therefore, The physical evidence that indicates that there has been a chemical reaction is that the beaker changes temperature and the correct option is option C.
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Magnesium metal reacts with oxygen according to the equation: Mg(s) + O2(g) → 2MgO2(s)
Which of the following would increase the rate of the reaction?
grinding the magnesium metal into a fine powder
packing the magnesium tightly at the bottom of the container
forming the magnesium metal into the shape of a sphere
forming the magnesium metal into single, large cube
Answer:
Grinding the magnesium metal into a fine powder. I took the test and got it right.