The change in enthalpy of the given reaction is 175.91 kJ/mol, which shows that reaction is exothermic.
How we calculate ΔH for the reaction?Change in enthalpy for the overall reaction will be calculated as:
ΔH = Enthalpy (H) of the product - Enthalpy (H) of the reactant
Given chemical reaction is:
NH₃(g) + HCl(g) → NH₄Cl
Heat of enthalpy of NH₃ = -46. 19 kJ/mol
Heat of enthalpy of HCl = -92. 30 kJ/mol
Heat of enthalpy of NH₄Cl = -314. 4 kJ/mol
Enthalpy of the reaction is calculated as:
ΔH = -314. 4 - [-46. 19 + (-92. 30)]
ΔH = -314. 4 - (-138.49)
ΔH = -175.91 kJ/mol
Hence, ΔH for the reaction is -175.91 kJ/mol.
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Which water sample (A, B or local sample) was more acidic to begin with.
what is your reasoning?
Answer:
B
Explanation:
Sample B takes more drops for both P- and T-alkalinity tests to reach pH 8.3 and 4.5. So it is more acidic to begin with.
pH is equal for all three.
Now look at the drops amount
21<52<25Higher the drops lower the solubility or its less acidic.
So sample A is most acidic then local then sample B
Let’s assume the clothes in the dryer are made of cotton. Cotton is made of long chains of carbon atoms that form fibers. Determine the number of protons, neutrons, and electrons in an atom of carbon using the information on the right.
Answer:
Protons = 6
Electrons = 6
Neutrons = 6
Explanation:
Given that:
Atomic number of C = 6
Mass number of C = 12
No. of protons:
We know that atomic number is the number of protons, so:
Protons = 6
No. of electrons:
Protons = electrons so:
Electrons = 6
No. of neutrons:
= Mass number - Atomic No.
= 12 - 6
Neutrons = 6
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If more greenhouse gasses were added to the atmosphere, what would happen to Earth's heat budget and the planet's temperature?
Answer:
Global Warming!
Explanation:
Greenhouse gases help keeping the Earth warm for example; Carbon dioxide, methane etc. But recently there has been too much pollution which produced more greenhouse gases like; carbon dioxide...Usually trees and plants would help in keeping the air clean by eliminating carbon dioxide but as we know trees are being cut down. Which increases the amount of CO2 (chemical formula of Carbon dioxide) and they capture more heat. Which causes the temperature to gradually increase in earth and ice caps to melt in Antarctica, and causes the water levels to rise.
This molecule has ___ bonds and is a ___ molecule.
a. nonpolar, polar
b. polar, nonpolar
c. nonpolar, nonpolar
d. polar, polar
explain why
A balloon contains 2.0 L of air at 101.5 kPa. you squeeze the balloon to a volume of 0.5 L. what is the pressure of air inside the balloon?"
A. 13 kPa
B. 101 kPa
C. 406 kPa
D. 812 kPa
Answer:
C
Explanation:
view the Attached photo i added to see how i got that answer
what mass of CaCl2 would be needed in order to make 750.00mL of a 2.00m CaCl2 solution
Answer:
The molality of the substance (CaCl2) ( C a C l 2 ) is Molality=2.88 m Molality = 2.88 m.
Hope this helps✌
hello friends ~
Food cans are coated with tin and not with zinc because:
A. Zinc is less reactive than tin.
B. Zinc is more reactive than tin.
C. Zinc has a higher melting point than tin.
D. Zinc is costlier than tin
Explanation:
it is because
zinc is more reactive than tin
At first glance because hydrogen is a nonmetal, it may seem like it is in the
wrong place in the periodic table. But there is a good reason for putting it
in that position. Why do you think hydrogen is located where it is?
Explanation:
because it has ns1 electron configuration like the alkali metals.Consider the following reaction: 2Mg + CO2 <--> 2MgO + C . A laboratory technician wants to increase the amount of MgO produced. Which of the following is the best way to accomplish this?
Add catalyst
increase the carbon
decrease the carbon
decrease the Mg
This problem is providing the equilibrium reaction between magnesium and carbon and asks for a way to increase the amount of magnesium oxide, a product. Thus, the answer turns out to be decrease the carbon.
Le Cha telier's principle.In chemistry, when a chemical reaction attempts to go to completion, it might experience a limitation known as equilibrium; a condition where it is not able to proceed any further.
In such a way, for the given reaction:
[tex]2Mg+CO_2\rightleftharpoons2MgO+C[/tex]
One can see that the increase of magnesium oxide, as required, can be accomplished by either increasing any reactant or removing any product in order to shift the equilibrium towards it.
In such a way, one concludes that the correct choice is decrease carbon as it will shift the reaction towards the product; however, we must keep in mind that neither solid nor liquid species contribute to the equilibrium.
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During an experiment, a chemistry student finds the concentration of a solid in a liquid by dividing 3.024 g by 0.07 mL. Using significant digits, what amount should the student record in the lab report
Answer:
40 g/mL
Explanation: i did it and got it right
Answer:
40 g/mL
Explanation:
got it right
Which of the following are signs of a
chemical change?
A. changes in state of matter, volume, and mass
B. changes in odor, color, and temperature
C. changes in shape, position, and size
D. changes in size, temperature, and state of matter
Answer:
A
Explanation:
Answer:
B. Changes in odor, color, and temp
Explanation:
The others are physical changes
hello people ~
. A substance is said to be sonorous if it _________.
A. conducts heat
B. conducts electricity
C. conducts water through metal pipes
D. produces a ringing sound when beaten
The Correct choice is D
Sonorous objects make ringing sound when they are beaten, eg. almost all metals are Sonorous.
what is the molarity of a solution that contains 3.4 moles of NaCL in 2.2 L of solution ?
Answer:
what is the molarity of a solution that contains 3.4 moles of NaCL in 2.2 L of solution ?
Explanation:
which layer is the oldest layer?
PLEASE ANSWER
Answer:
rock strata farthest from the ground surface are the oldest
THERE U GO
I HOPE IT HELPS YOU PLEASE MARK ME BRAINLIEST IF YOU ARE SATISFIED BY THE ANSWER:)What could cause a build up of algae which would decrease the amount of oxygen available for the organisms in the river? protecting natural vegetation along the river. erosion of the watershed factory pollution fertilizer run off from crops into the river
Answer:
In addition, other pollutants like fertilizers, pesticides, and heavy metals are often attached to the soil particles and wash into the water bodies, causing algal blooms and depleted oxygen, which is deadly to most aquatic life.
What is anaerobic respiration in your own words
Answer:
Anaerobic respiration is the type of respiration through which cells can break down sugars to generate energy when oxygen isnt there
Explanation:
hope this helps!
Anaerobic respiration occurs without oxygen and releases less energy but more quickly than aerobic respiration.
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What could we do to destroy energy?
A. transfer energy to a black hole
B. nothing
C. reduce the output of power plants
Na + H2 → NaCl balanced equation
Answer:
..............
........
.............
[tex]\\ \rm\rightarrowtail 2Na+H_2\longrightarrow 2NaH[/tex]
On both sides
Na=2H=2Hence balanced
How
molecules of iron (iii) oxide
many
can be produced from 13.5 moles fe?
The number of molecules of iron (iii) oxide F₂O₃ that can be produced from 13.5 moles of Fe is 4.06×10²⁴ molecules
Balanced equation4Fe + 3O₂ —> 2F₂O₃
From the balanced equation above,
4 moles of Fe reacted to produce 2 moles of F₂O₃.
Therefore,
13.5 moles of Fe will react to produce = (13.5 × 2) / 4 = 6.75 moles of F₂O₃
How to determine the number of molecules of F₂O₃ produced
From Avogadro's hypothesis,
1 mole of F₂O₃ = 6.02×10²³ molecules
Therefore,
6.75 moles of F₂O₃ = 6.75 × 6.02×10²³
6.75 moles of F₂O₃ = 4.06×10²⁴ molecules
Thus, 4.06×10²⁴ molecules of F₂O₃ were obtained from the reaction
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6.00g of gold was heated from 20.0c to 22.0c. How much heat was applied to the gold
Over long periods of time, the climate of an area can change. Which of these can cause a change in climate?
Answer:
You didnt give use the choices you have but I can try to help. Climate can change when it snows,rains,when it is sunny,or cloudy.
Explanation:
The rain allows the climate to cool down depending in the weather out. Same with cloudy weather. Snow can also cause temperature to drop down. When it is sunny, the climate in the sun will be warm, until getting in the shade and it gets cold again.
The more directly the sun strikes a place on earth’s surface, the more _______ the energy is and the _______ it will be. Areas that receive less direct sunlight experience colder months.
Question 1 options:
colder, less
concentrated, warmer
warmer, concentrated
less, colder
Answer:
concentrated,warmer
Explanation:
direct sunrays means that the place recieves more insolation so the energy will be more concentrated there and the place will be warmer.
Nitrogen gas and hydrogen gas react to produce ammonia according to the following equation.
N2 + 3H2 → 2NH3
Which ratio of components is correct?
A For every 2 moles of nitrogen gas, the reaction requires 3 moles of hydrogen gas.
B For every 3 moles of hydrogen gas, the reaction produces 2 moles of ammonia.
C For every mole of hydrogen gas, the reaction produces 2 moles of ammonia.
D For every mole of nitrogen gas, the reaction produces 1 mole of ammonia.
Answer:
The answer will be "B"
Explanation:
It is B, because as we can see in the problem, it shows that there are three hydrogen gas, which is H₂. So, it shows that the ratio of Hydrogen gas to Ammonia is 3:2. In the answer, it says for every 3 mol of H₂ 2 moles of ammonia is produce. Therefore, B is correct.
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The reaction between bromine gas and fluorine gas to create bromine monofluoride gas has reached equilibrium. What is the effect of adding more bromine gas to the reaction chamber
Answer: The reaction between bromine gas and fluorine gas to create bromine monofluoride gas has reached equilibrium. What is the effect of adding more bromine gas to the reaction chamber?
More fluorine gas will be produced.
More bromine gas will be produced.
More bromine monofluoride gas will be produced.
Less bromine monofluoride gas will be produced.
I think it is more bromine monofluoride will be produce
Explanation:
2 NaOH(aq) + H₂SO4 (aq) → Na₂SO4(aq) + 2 H₂O (1)
convert this equation into a full ionic equations and half equation with an explanation :)
Which chemical process generates the atp produced in glycolysis?.
Atp is a form of energy and it is generated through a chemical process called substrate level phosphorylation.
What is substrate level phosphorylation?Substrate-level phosphorylation is a reaction that makes use of substrate to generate Adenosine triphosphate (ATP) which is a form of energy.
ATP is produced through the transfer of phosphate group from the substrate directly to adenosine diphosphate (ADP).
Therefore, substrate-level phosphorylation generates the atp produced in glycolysis.
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How do big mountain ranges form?
Answer:
Large mountain ranges form when tectonic plates hit each other in a short process called plate tectonics, and then fasten, like the hood of a car.
Write down your observations of what the pieces of cabbage in the images look like
During a chemistry experiment, two colorless liquids were combined in a beaker. The beaker
became warm to the touch. Then a yellow solid settled to the bottom of the beaker. Which
statement best explains the observations?
The chemical reaction occurs due to which heat energy is released. This type of reaction is also called exothermic reaction.
What is exothermic reaction?Exothermic reactions are those chemical reactions that produce heat or thermal energy to the surrounding environment so we can conclude that chemical reaction occurs when the temperature of the beaker is suddenly increased.
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Predict the following products balance determine reaction