Answer:
149.94J
Explanation:
According to specific heat capacity, 149.94 joules are needed to increase the temperature of 15.0 g of Fe from 20.0°C to 40.0°C .
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
Substitution in above formula gives Q=15×0.4998×20=149.94 J.
Thus 149.94 Joules are needed to increase the temperature of 15.0 g of Fe from 20.0°C to 40.0°C .
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Is this equation right?
Answer:
no
Explanation:
because the characters are invalid
Answer:
no
Explanation:
because they are not valid
Name this compound according to IUPAC nomenclature rules.
A) nitrogen oxide
B) nitrogen oxygen
C) nitrogen monoxide
D) Mononitrogen monoxide
Answer:
B: nitrogen oxygen
Explanation:
Hope it helps you thanks!!
You start at (8, 1). You move right 2 units. Where do you end
Answer:
(10,1) I Believe this is the correct response, if not I apologize. Hope it helps! (^^)
Pleaseeee help I’m desperate
If u can answer all three of them
I’ll give you brainliest
Answer:
5.80
Explanation:
When the pH of an aqueous solution is 8, what is the OH- ion concentration in moles per liter?
A. 1 × 10-14
B. 1 × 10-8
C. 1 × 10-7
D. 1 × 10-6
Answer:
D. 12 is 1 × 10-6
Explanation:
The answer is Option D is correct , the OH- ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
What is pH ?
It is a measure of how acidic/basic water is.
The range goes from 0 to 14, with 7 being neutral.
pH less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
The pH of water is a very important measurement concerning water quality.
pOH = - log [OH⁻]
pH + pOH = 14
We have been given that pH is 8
so pOH will be 14 - 8 = 6
pOH = - log[OH⁻]
[OH⁻] = antilog [- pOH]
[OH⁻] = antilog [-6]
[OH⁻] = 1 x 10 ⁻⁶ moles /liter
Therefore Option D is correct , the OH⁻ ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
To know more about The answer is Option D is correct , the OH- ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
What is pH ?
It is a measure of how acidic/basic water is.
The range goes from 0 to 14, with 7 being neutral.
pH less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
The pH of water is a very important measurement concerning water quality.
pOH = - log [OH⁻]
pH + pOH = 14
We have been given that pH is 8
so pOH will be 14 - 8 = 6
pOH = - log[OH⁻]
[OH⁻] = antilog [- pOH]
[OH⁻] = antilog [-6]
[OH⁻] = 1 x 10 ⁻⁶ moles /liter
Therefore Option D is correct , the OH⁻ ion concentration in moles per liter is 1 x 10 ⁻⁶ moles /liter .
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How much heat energy is needed to heat 250 g of water from 200C to its boiling point and then completely vaporize it?
show all work partial credit will be given
Your answer:
Answer: 40.66kJ/mol.
Explanation:Assuming that pressure is equal to Explanation:Assuming that pressure is equal to 1 atm Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C to vapor at
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C to vapor at 100
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C to vapor at 100∘
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C to vapor at 100∘C
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C to vapor at 100∘C .
Explanation:Assuming that pressure is equal to 1 atm , boiling water at its boiling point implies providing it with enough heat to turn it from liquid at 100∘C to vapor at 100∘C .The amount of heat needed to allow one mole of water to undergo this phase change is called the enthalpy change of vaporization,
nge of vaporization, Δ
nge of vaporization, ΔH
nge of vaporization, ΔHvap
nge of vaporization, ΔHvap .
nge of vaporization, ΔHvap .For water at
nge of vaporization, ΔHvap .For water at 100
nge of vaporization, ΔHvap .For water at 100∘
nge of vaporization, ΔHvap .For water at 100∘C
nge of vaporization, ΔHvap .For water at 100∘C , the enthalpy change of vaporization is equal to
nge of vaporization, ΔHvap .For water at 100∘C , the enthalpy change of vaporization is equal toΔ
nge of vaporization, ΔHvap .For water at 100∘C , the enthalpy change of vaporization is equal toΔH
nge of vaporization, ΔHvap .For water at 100∘C , the enthalpy change of vaporization is equal toΔHvap
nge of vaporization, ΔHvap .For water at 100∘C , the enthalpy change of vaporization is equal toΔHvap=
nge of vaporization, ΔHvap .For water at 100∘C , the enthalpy change of vaporization is equal toΔHvap=40.66 kJ/mol
This gardener started with much smaller plants in this park. Over time, the garden has grown into a large display of brilliant flowers. What would you tell the gardener to explain how the plants have grown and flourished so successfully?
How much heat is required to raise the temperature of a sample of copper from 0.0°C to 55.0°C, if its specific heat is 0.384 J/g°C and its mass is 10.00 g? Group of answer choices 351.4 2110 211.2 3.54
Answer:
211.2 J
Explanation:
Applying
Q = cm(t₁-t₂)............... Equation 1
Where Q = Amount of heat, c = specific heat capacity of copper, m = mass of copper, t₁ = initial temperature, t₂ = final temperature.
From the question,
Given: c = 0.384 J/g°C, m = 10 g, t₁ = 0°C, t₂ = 55°C
Substitute these value into equation 1
Q = 0.384×10×(55-0)
Q = 0.384×10×55
Q = 211.2 J
How do the circulatory system and respiratory system interact and work together?
I would say because the respiratory system brings in the oxygen for the body and the circulatory system moves it throughout the body with the blood
Answer:
The respiratory system helps you breath meanwhile your circulatory system helps the oxygen circulate in your blood throughout your body.
Explanation:
It helps you do many tasks like running, sprinting, etc.
How are ionic bonds formed?
Multiple choice question.
A)
loss of electrons by atoms
B)
sharing of electrons between atoms
C)
electrostatic forces between ions
D)
gain of electrons by atoms
Answer:
c
Explanation:
Answer:
Same type of question from quizlet
But the answer is C
I hope you got it right :)
PLS HELP ASAP NO LINKS PLS
How long is radioactive waste from nuclear plants radioactive?
1,000 years
10,000 years
100 years
100,000 years
Answer:
1000 years.
Explanation:
I'm not shure how to explain. it is a facr
CaCo3 decomposes in the equation below. What is the enthalpy of the reaction?
CaCO3 (S) ---> CaO (s) + CO2 (g)
a. 178.3 kJ
b. 571.8 kJ
C. -1029 kJ
d. -2236 kJ
Answer:Typically a decomposition reaction is endothermic. Use the decomposition of limestone (CaCO3) to draw an energy diagram for a decomposition reaction assuming it occurs at constant pressure.
Explanation:hope this helps
For this lab it is not necessary to observe any special lab precautions.
A) True
B) False
The result of combining Epson salt and ammonia are__________________.
A) Bubbles
B) Change of color
C) Formation of solid material
Answer:
Hello! Your answer would be, BELOW
Explanation:
A) True
B) Change of color
Hope I helped! Ask me anything if you have any questions. Brainiest plz!♥ Hope you make a 100%. Have a nice morning! -Amelia♥
What is Dalton’s Law as it applies to partial pressures?
Answer:
According to Dalton's law of partial pressures, the total pressure by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases. The partial pressure is defined as the pressure each gas would exert if it alone occupied the volume of the mixture at the same temperature.
A gas has a volume of 240 mL and a pressure of 0.99 atm. If the pressure is decreased to 0.951 atm, what is the new volume of the gas?
V2 = 250 ml
Explanation:
Given:
P1 = 0.99 atm. V1 = 240 ml
P2 = 0.951 atm. V2 = ?
We can use Boyle's law to solve for V2
P1V1 = P2V2
V2 = (P1/P2)V1
= (0.99 atm/0.951 atm)(240 ml)
= 250. ml
If the final mass of the system is 120g, what was the percent yield of the reaction?
Answer:
Sorry for the wrong answer plz
99% was the percent yield of the reaction. So, the correct option is A.
What is Percent yield?Percent yield is defined as the percentage ratio of the actual yield to the theoretical yield. It is a measure of the amount of moles of product formed in relation to the reactant obtained in a chemical reaction, expressed as a percentage.
For percent yield, we have to first find the number of moles.
1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)
Mole of Mg (s)= Mass of Mg/ Molar mass
=48/24= 2 moles
Moles of HCl= 73/36.5= 2moles
So, 1 mole of Mg reacts with 2 moles of HCl as per the equation which means HCl is the limiting reagent. Mg will act as excess reagent so only 1 mole of Mg will react while the unreacted Mg will be 24g i.e. 1 mole.
The product which is experimental= 120-24= 96g
Theoretical product formed= 1mole of [tex]MgCl_2[/tex]+ 1 mole of HCl= 95+2= 97gm/mole
Percentage Yield = (experimental Yield / Theoretical Yield) × 100 %
= (96/97)*100 = 98.96% which is approx. 99%
Thus, 99% was the percent yield of the reaction. So, the correct option is A.
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Your question is incomplete, most probably the complete question is:
The Following Reaction Is Carried Out:
1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)
The Initial Masses Of The Uncombined Reactants appear below:
Mass of magnesium- 48g
mass of hydrochloric acid= 73g
The reactants are combined and the final mass of the system is determined. If the final mass of the system is 120g, what was the percent yield of the reaction?
99%50%1%25%Chemistry help!
Zoom in to see better!!
Answer:
2.5 moles of Al
Explanation:
We'll begin by calculating the number of mole in 127 g of Al₂O₃. This can be obtained as follow:
Mass of Al₂O₃ = 127 g
Molar mass of Al₂O₃ = 101.961 g/mol
Mole of Al₂O₃ =?
Mole = mass / molar mass
Mole of Al₂O₃ = 127 / 101.961
Mole of Al₂O₃ = 1.25 mole
Finally, we shall determine the number of mole of Al that reacted. This can be obtained as follow:
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted to produce 2 moles of Al₂O₃.
Therefore, Xmol of Al will react to produce 1.25 moles of Al₂O₃ i.e
Xmol of Al = (1.25 × 4)/2
Xmol of Al = 2.5 moles.
Thus, 2.5 moles of Al is needed for the reaction.
Work out the relative formula mass of ammonium nitrate, NH4NO3.
Relative atomic masses: H 1; N 14; O 16.
...........................................................................................................................
...........................................................................................................................
Relative formula mass of ammonium nitrate = ...............................
Answer:
The relative molecular mass of ammonium nitrate is 80 gm
Explanation:
[tex]M_{NH4NO3}[/tex] = 14 + (4 × 1) + 14 + (16 × 3) = 80 (gm)
Response Sheet-Investigation 5
A group of young students looked at the oak trees in a local park.
They wondered this question. Giant oak trees grow from tiny acorns,
so where do all of their wood, bark, and leaves come from?
One student explained, "Once the acorn sprouted in the ground, the
plant grew so big from minerals and nutrients in the soil."
Another student said, "I think the plant's mass came from the food
it ate."
What would you say to these students?
A group of young students looked at the oak trees in a local park.
They wondered this question. Giant oak trees grow from tiny acorns,
so where do all of their wood, bark, and leaves come from?
One student explained, "Once the acorn sprouted in the ground, the
plant grew so big from minerals and nutrients in the soil."
Another student said, "I think the plant's mass came from the food
it ate."
What would you say to these students?
First, I will tell the students that oak trees do indeed grow from tiny acorns (nut), seeds, or stem cuttings.
Then, I will go ahead to explain to them how they grow so big with their wood, bark, and leaves.
The seeds first sprout from the acorn by utilizing the food reserves in the seed's embryo for its metabolismOnce the acorn sprouts, the root takes up mineral, nutrient, and water from the soil and these materials are used by seed cotyledons to manufacture food via photosynthesismanufactured foods are utilized to build the plant's body, including increase in the number of leaves, girths, barks, and woods.More on the oak plant can be found here: https://brainly.com/question/22999577
Are new atoms made during a chemical reaction?
Answer:yes
Explanation:depending on the chemical properties and amount of the chemical and the state of matter and amount of mass
Find the pH of a solution with a [H+] of 0.045M.
Answer:
1.35Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ {H}^{+} ])[/tex]
From the question
[H+] = 0.045 M
We have
[tex]pH = - log(0.045) \\ = 1.346787...[/tex]
We have the final answer as
1.35Hope this helps you
Answer:
1.35
Explanation:
44.0L of O2 react with excess Sulfur dioxide gas. All gases are kept at the same temperature, pressure, and volume. What will be the theoretical yield of Sulfur trioxide gas in Liters?
Answer:
The theoretical yield of sulfur trioxide is 88.0 Litres
Explanation:
The chemical reaction occurring between oxygen and sulfur dioxide is given in the chemical equation below :
2SO₂ + O₂ ----> 2SO₃
From the equation of reaction, 2 moles of sulfur dioxide reacts with 1 mole of oxygen to produce 2 moles of sulfur trioxide.
Volume of 1 mole of a gas at STP is 22.4 L
Number of moles of gas in 44.0 L = 44.0/22.4 moles
1 mole of oxygen reacts with 2 moles sulfur dioxide to produce 2 moles of sulfur trioxide;
44/22.4 moles of oxygen will react with excess sulfur dioxide to produce 2 × 44/22.4 moles of sulfur trioxide = 88/22.4 moles of sulfur trioxide
88/22.4 moles of sulfur trioxide will have a volume of 88/22.4 × 22.4 Litres = 88.0 Litres
Therefore, the theoretical yield of sulfur trioxide is 88.0 Litres
plz help me solve this question is it A,B,C or D
Answer:
c
Explanation:
to reduce pressure on the reactants
Which of the following is the same as 1 second?
O A. 1,000 ks
B. 0.1 ms
C. 100 cs
D. 100 ms
Which of these is true for a fission reaction?
A. it is an endothermic reaction
B.a heavy nucleus splits into two smaller nuclei
C.two light nuclei combine to form a single heavier nucleus
D.it is an interaction between valence electrons of a atom.
Answer:
Explanation:
The answer is B heavy nucleus splits into two smaller nuclei
Which of the following diagrams represents summer in the northern hemisphere?
Answer:
a
Explanation:
becuse the way is look
Please and thank you in advance. Due today
Answer:
Sorry I really don't know but can you help with one of my question I posted please thanks.
What design element of an astronaut's spacesuits protects him or her from micrometeoroids, which are tiny bits of space debris travelling at high speeds?
Answer:
Tough outer shell
Explanation:
Three types of space suits based on their purpose are IVA (Intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity)
Space suits have an outer layer known as the Integrated Thermal Micrometeoroid Garment also known as the TMG or ITMG
The functions of the TMG includes the provision of an insulation medium to the wearer of the suit thereby preventing loss of heat and keeping the wearer warm, protect the wearer from solar radiation which are harmful as well as from Micrometeoroid and debris orbiting in space known as MMOD
The outermost layer of the EMU TMG suits is white Ortho-Fabric that consists of Nomex, Kevlar and Gore-Tex, making it fire resistant, very strong and very tough, and water proof as well as breathable.
Fullerenes (like the one shown) are made up of hexagonal rings of carbon atoms (like in graphite or graphene) and alternating pentagonal and heptagonal carbon rings to allow curvature of the surface producing molecules that have a complete hollow shape.
The extremely small diameter of the nanoparticle fullerenes (which act like a cage) allows them to readily pass through cell membranes and be readily absorbed into the body.
What potential benefit does this have in the pharmaceutical industry as well as medicine?
A)
The very small fullerene molecules would keep cancer cells from invading other healthy cells. As a result, it would keep cancer from spreading.
B)
The very small fullerene molecules could allow surgeons to see the insides of cells with tiny cameras as they perform complex surgery.
C)
The very small fullerene molecules could obstruct hazardous chemicals from getting into absorbed into cells.
D)
The very small fullerene molecules could easily deliver drugs directly into cells in a highly controlled manner.
Answer:
Your answer choice is D
Explanation:
I just got it right on USATestprep :))
At 15 mph, how long does it take to travel 15 miles?
Answer:
1 hour
Explanation:
Travelling at 15 miles per hour will get take 1 hour to travel 15 miles.