Answers
Answer:
Reaction 1 = -462.5 kJ/mol
Reaction 2 = -572 kJ/mol
Magnesium combustion = -601.83 kJ/mol
Related Questions
What is the oxidation state of S in S2032-?
O A. +3
O B. -2
O C. +4
D. +2
Answers
Answer: D.) +2
so the oxidation state of sulfur is +2.
Explanation:
Rust forming on a piece of iron is an example of which of the following? *
1The natural process of decay as metallic ions age
2 A physical change because the process can be reversed
3 A chemical change because oxygen atoms from the atmosphere bonded with the iron atoms
4 A violation of the laws of physics because new mass has been created
Answers
Match the words and the definitions (15 points for you, please answer quickly <3)
Question 1 options:
Umbra
Eclipse
Penumbra
Corona
1.
The outer, larger, lighter shadow
2.
During a solar eclipse, the moon covers the sun, a small ring of fire is visible around the edge
3.
to vanish
4.
the inner, darkest, cone-shaped shadow is
Answers
Umbra is cone shaped, darkest, inner shadow, eclipse means to vanish, when moon covers sun during solar eclipse, ring of fire visible is called as corona, and larger, lighter shadow of outside is called penumbra. Thus, 1. D, 2. C. 3. B, 4. A are correct.
What is an eclipse?When any astronomical object is temporarily become unclear, because its light is blocked by another object bypassing it, during an astronomical event it is called as eclipse.
Umbra and penumbra re caused by solar eclipse. When light source is completely covered by light source, it is called umbra and when, partial illumination or partial shadow occur, it is called penumbra.
The ring of light visible around edges, during solar eclipse, it is called as corona. Therefore, option 1. D, 2. C. 3. B, 4. A are correct.
Learn more about eclipse, here:
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An idea is being proposed. The steps that led to the idea are listed below:
There was a review by the scientific community.
The data collected was observable and measurable.
Opinion and values of all social groups were implemented.
Can this idea be scientific?
A. Yes, because the idea was tested empirically.
B. No, because opinions and social values may lead to bias.
C. Yes, because all steps of the scientific method were followed.
D. No, because the scientific community often favors its peers.
Answers
Answer:
No because opinion and social values may lead to bias
Explanation:
I'm smart >:)
B. No, because opinions and social values may lead to bias.
if it's wrong correct me but I'm pretty sure that's right!
i need this answer today help pls
Answers
Answer:
A. 28 days
Explanation:
Answer:
about 29.53 days
So, 28 days.
Explanation:
If you want the exact, It takes 27 days, 7 hours, and 43 minutes. Yes, i was bored so i calculated it. I'm good with astrology.
which of the following acts as a catalyst in catalytic converters?
A. Wood
B. Metal
C. Water
D. Gas
Answers
Answer:
B. Metal
Explanation:
The catalyst used in the converter is mostly a precious metal such as platinum, palladium and rhodium. Platinum is used as a reduction catalyst and as an oxidation catalyst. Although platinum is a very active catalyst and widely used, it is very expensive and not suitable for all applications.
Hope it helps plz mark brainlist :)
someone help ,, I'll give brainliest lolll .
Answers
Answer:
# 4
Explanation:
Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism.
Which of the following objects would take you the greatest amount of force to accelerate?
Answers
Complete question is;
Which of the following object would take you the greatest amount of force to accelerate.
A) a soccer ball with a mass of 0.5 kg
B) a refrigerator with a mass of 200 kg, C) a bike with a mass of 25 kg
D) a car with a mass of 5,000 kg,
Answer:
D) a car with a mass of 5,000 kg
Explanation:
Formula for force is;
F = ma
Where;
F is force
m is mass
a is acceleration
Now, Force is directly proportional to the acceleration and mass.
Thus, the higher the mass, the greater the force.
Thus, the object that will require the most force is the one that has the highest mass.
Looking at the options, the one with the highest mass is option D.
Why do lawmakers have so much to consider when debating effective energy policies 
Answers
Answer: Different ways of distributing energy have different short-term and long-term environmental consequences.
Explanation:
Due to the big issue of some energy sources being non-renewable and some being renewable, lawmakers have a lot on their plate. Non-renewable sources of energy are harmful to the environment, but they work the best. Renewable sources of energy cost a lot and work, but they require a lot of effort.
In a solution made of baking soda and water, the baking soda is the?
Answers
Answer:
solute
Explanation:
water is the solvent and baking soda is the solute and it dissolve in water to make a solution
A tower built of Iron is 500 meter tall. What is the change in height (m) if it is exposed to 25 0 Celsius during summer and at 1.00 Celsius during winter. α iron = 1.2 x 10-5/ Celsius
Answers
Answer:
-0.144 m
Explanation:
From the question,
α = Δh/(h₁Δt).................... Equation 1
Where α = coefficient of linear expansivity of iron, Δh = change in height, h₁ = initial height, Δt = change in temperature.
make Δh the subject of the equation
Δh = α(h₁Δt)..................... Equation 2
Given: α = 1.2×10⁻⁵/°C, h₁ = 500 m,
Δt = (t₂-t₁) Where t₂ and t₁ = Final and initial temperature respectively.
Δt = (1-25) = -24 °C
Substitute these values into equation 2
Δh = 1.2×10⁻⁵[500×(-24)]
Δh = 1.2×10⁻⁵(-12000)
Δh = -0.144 m
The balanced equation below shows the products that are formed when butane (C4H10) is combusted.
2C4H10 + 13O2 Right arrow. 8CO2 + 10H2O
What is the mole ratio of butane to carbon dioxide?
2:8
1:5
13:8
13:10
Answers
Answer:
2:8
Explanation:
Answer:
2:8
Explanation:
got it right on edge
Which is true of the enthalpy of a reaction?
Answers
Answer:
C. Its Value Does Not Depend On Which Reactions Are Added
Explanation:
I Just took the test
The true statement of the enthalpy of a reaction is its value does not depend on which reaction is added. The correct option is C.
What is enthalpy?
Enthalpy is a term of thermodynamics. It is the total internal energy and product of the pressure and volume of a system. It can not be calculated, but can be changed.
Thus, the correct option is C, its value does not depend on which reaction is added.
Learn more about enthalpy
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does anybody know the answer to this?
Answers
Answer:
The answer is Conduction.
Which plate is the South American plate?
Web
D
O A D
B. A
C. B
В
D C
Answers
Answer:
C. B
Explanation:
The correct plate is showing n the green color that is of South America and is a major tectonic plate. The plate belongs to the south American continent and forms the southernmost part of the mid-Atlantic ridge. According to the plate movement, it's still moving to the west away from the Atlantic ridges due to the seafloor spreading. Has The plate has an approx area of 43,600,000 km square.How has the atom changed since Rutherford’s Early Atomic Model?
Answers
Answer:
the atom has changed in many ways, we have found sizes, masses, electrons, neutrons, and more.
Explanation:
whats the number of atoms in 5CaC12?
Answers
There are 70 atoms in 5CaC12
Calculate the energy of interaction between a lithium ion and a magnesium ion at a distance of 4.55x10^-10 m
Answers
11. What is the molarity of a solution that has 0.512 moles of NaCl dissolved in 0.24 L of solution? (Show WORK. Circle the correct answer: 2.1M or 1.2M)
Answers
Answer:
2.1 M
Explanation:
Molarity is moles per liter:
0.512 mol NaCl / 0.24 L = 2.1 M
How does living in a group help wolves?
Answers
Answer: They can hunt together.
Explanation:
Answer:
Wolves are pack animals. They live together in small groups, or families.It's a howl of support, to let the pups know that the pack is there. The other pack members tip their heads back and add their voices to the call.
Explanation:
Match the items to use the analogy of time to the vocabulary of chemistry.
1 Year
Amount of Matter
Time in general
-
1 Atom/Particle
1 Second
1 Mole
1
Answers
Answer:
1 year- 1 mole
time in general- amount of matter
1 second- 1 atom/ particle
Where is most of an atom's atomic mass?
Answers
Answer:
The nucleus contains the majority of an atom's mass because protons and neutrons are much heavier than electrons, whereas electrons occupy almost all of an atom's volume. The diameter of an atom is on the order of 10−10 m, whereas the diameter of the nucleus is roughly 10−15 m—about 100,000 times smaller.
Explanation:
Answer: Nucleus.
Explanation:
can someone help me i need it before 10:10
Answers
Answer:
B 6NO A 5N2 C 6H2O D 4Nhd
Explanation:
Describe the periodic trend in the ionization energy of elements down a group. Use the periodic table, ionization energy and your knowledge of atomic radius as evidence.
Answers
Answer:
As we move down the group it increases.
Explanation:
This is because the electrons are farther away from the nucleus and hence they are not tightly bounded.
In a metallic bond electrons are _______________. A. transferred C. shared B. delocalized D. lost
Answers
Answer:
in a metallic bond electrons are delocalized
A solid has a fixed ___________________ and a fixed ____________
Answers
Answer:
Shape and volume
hope this helps
have a good day :)
Explanation:
definition of diameter?
Answers
Answer:
a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
Explanation:
a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
Explain why the Cell A (nerve cell) and Cell B (red blood cell) cannot switch jobs
Answers
That is copied from “gene expression” article
But all in all, the cells have different structures and different jobs. This means that they are produced for that one job and cannot be made to do another job that they aren’t specifically made for. As well the dna make up will produce these cells specifically and in different cells than the other.
Hopefully this helps some. Have a nice day!
Question #9: What is the
temperature at an altitude of 50
kilometers above sea level?
Answers
Answer:
20ºCelsius
Explanation:
If you get a root canal or any other potentially painful procedure done at the dentist's office, he or she will probably inject your gums with a local anesthetic to "numb the pain." Neurons that trigger pain are called nociceptors. They trigger pain in order to alert the body to potentially dangerous stimuli. Most local anesthetics hinder the activity of all local neurons, not just nociceptors, so pain is not the only sensation that goes away temporarily. Because all feeling is gone, you can end up drooling on yourself without knowing it.
Considering this information about local anesthestics, which of the following statements best demonstrates that science is an ongoing process that changes in response to new information and discoveries?
A. There are a variety of local anesthetics being used today, including lidocaine, prilocaine, and mepivacaine.
B. Sir Charles Sherrington, who discovered nociceptors, wrote a book about the nervous system that helped show its role in allowing organisms to adapt to their environments.
C. Unlike a local anesthetic, a general anesthetic causes a person to lose consciousness rather than sensation in one area.
D. Scientists have discovered a way to use a compound found in hot peppers, capsaicin, along with an anesthetic in order to block nociceptors only.