Answers
Answer:
1. The enthalpy change for the backward reaction is –20 KJmol¯¹
2. The forward reaction is endothermic.
3. The activation energy for the forward reaction is +70 KJmol¯¹.
Explanation:
Considering the diagram given above, the following data were obtained:
1. The enthalpy change for the forward reaction being is +20 KJmol¯¹ and so, the enthalpy change for the backward reaction is –20 KJmol¯¹
2. The heat energy of the product is higher than that of the reactant. Therefore, the forward reaction is endothermic.
3. Activation energy is the minimum energy needed to be overcome in order for the reaction to proceed to product. It can be obtained from the energy profile diagram by considering the energy between the reactants and the peak.
For the question given above, Activation energy = 20 + 50
Activation energy = +70 KJmol¯¹
Related Questions
Suppose the innermost orbit an electron can occupy has an energy level of -19 eV. Based on the absorption spectrum shown below, what is the energy of energy level 4?
A. -2 eV
B. -8 eV
C. -11 eV
D. -13 eV
Answers
Answer:
It's B.
Explanation:
I got it wrong, it's B
How is Earth’s geologic history classified?
Answers
How many protons, electrons and neutrons does 116Sn4+ have?
Answers
Answer:
46 electrons, all I know.
Sorry!
Explanation:
please help me :(
In two or more complete sentences explain how to balance the chemical equation,
CH2 + O2 CO2 + H2O and include all steps.
Answers
Remember:
to balance equations in chemistry, you have to count the amount of atoms there are in a chemical eg:
the number of atoms in H20 are:
2 atoms of hydrogen
1 atom of oxygen (when there are no numbers by the letter it means that theres only 1 atom of it!)
The number next to a letter means the number of atoms thta it is made up of and atoms are the things it is made up of eg chocolate the ingredients are cocoa, milk and sugar ect so just like that CO2, H20 an ALL types of chemicals are made up of atoms. BUT WE WANT TO KNOW HOW MANY ATOMS- so u need to list these for all the 4 chemicals in the equation.
Im telling u this so that u can list out all of the atoms in each chemical (I will do the first two)
CH2=
1 atom of Carbon
2 atoms of hydrogen
O2=
2 atoms of oxygen
once u have listed out all the atoms from EACH of the chemicals in ur question (CH2, 02, CO2 and H20) categorise them like this
CH2
Carbon=........ Atoms
Hydrogen= .......Atoms
(Make sure the table is like vertical like lemme show u as an example. ATTACHED IS AN EXAMPLE OF WHAT UR WORK SHOULD BE SET OUT AS)
When you see the addition sign it means that elements like oxygen and hydrogen etc..basically add them up like CO2 + H20 theres oxygen in both so add up the atoms of oxygen FOR JUST CO2 AND H20 like if there was one atom of oxygen in CO2 and 2 in h20 add them up and it makes three (1+2=3). 1 oygen atom from CO2 plus 2 oxygen atoms in H20 that makes 3 atoms for both the chemiclas together (THIS WAS JUST AN EXMAPLE THERE ARENT ACTUALLY 2 ATOMS IN H20 OR 1 ATOM IN C02)
Look at the similarities OF ATOM NUMBERS like if CH2 has one atom of Carbon, CO2 ALSO has one atom of carbon which is fine BUT when it comes to differences u need to cross those out and PUT THAT NUMBER on both sides like if O2 has 2 atoms of oxygen and h20 has 1 that means that they need to be balanced like they either both need to be 1 atom or 2 atoms so for that u need to look attachment sorry u just need to cross them out and make them the same
make sure to write about what atoms are, to list out atoms for each chemical, compare the chemicals in both word chemicals and make them even!
Explanation:
Do you think Hugh would have been able to perform this experiment in his laboratory at home 20 years ago? Explain your answer.
Answers
Answer:scientists finished deciding the human genome in 2001. This research helped genetics analyze and islote sections of DNA for investigation. Without this information and the technology invented during the Human Genome Project, Hugh would not have been able to extract portions of his daughters DNA. Also, he wouldn’t have been able to see the genes that did not function properly in his daughters DNA.
Explanation: this is a right answer for PLATO.
Which statement would be true if glucagon secretion were permanently inhibited, resulting in negative feedback?
Blood glucose levels would decrease.
Glycogen formation would be inhibited.
Insulin production would decrease.
The synthesis of fat would decrease.
Answers
Answer:
Insulin production would decrease.
Explanation:
Insulin and Glucagon work together to balance the sugar levels in the human blood stream. They work together in a negative feedback loop. Glucagon stimulates the liver to release glucose into the bloodstream in a process known as glycogenolysis. Insulin on the other hand is a sugar-lowering hormone.
Therefore, if glucagon secretion were permanently inhibited, insulin production would decrease as there would not be excess blood sugar to be reduced.
Answer:
Insulin production would decrease.
The soluble bases are called alkalis. *
true or false
Answers
Answer:
True
Explanation:
Those bases which are soluble in water are called alkalis
A scientist was working in a nuclear reactor facility and was exposed to radioactive particles. Although the scientist was wearing only basic clothing as protection, she exhibited no symptoms of radiation poisoning. What type of radiation was the scientist most likely exposed to?
Group of answer choices
A. Beta
B. Gamma
C. Alpha
D. None of the above
Answers
Answer:
C. Alpha
Explanation:
In a nuclear reactor facility, radioactive decay takes place, which is any several processes by which unstable nuclei emit subatomic particles and ionizing radiation and disintegrate into one or more smaller nuclei. A scientist working under this condition is likely to be exposed to alpha particles because it contains a minimal absorption range and they are the least dangerous regarding external exposure.
75% of the gases that make up the atmosphere are found below
16 kilometers
6 kilometers
10 kilometers
12 kilometers
Answers
Can someone help me with this??
Answers
ﾟ+*:ꔫ:*﹤ ﹥*:ꔫ:*+ﾟAnswer:ﾟ+*:ꔫ:*﹤ ﹥*:ꔫ:*+ﾟ
The following: Jupiter, Saturn, Uranus, or Neptune.
ﾟ+*:ꔫ:*﹤ ﹥*:ꔫ:*+ﾟExplanation:ﾟ+*:ꔫ:*﹤ ﹥*:ꔫ:*+ﾟ
any of the planets Jupiter, Saturn, Uranus, and Neptune whose orbits lie beyond the asteroid belt.
Answer:
it is Saturn
Explanation:
and outer planter is just a planet outside the asteroid belt
In which isine is the strong nuclear force na strong enough to balance destuetatic forces between Gond?
carton 12
hydrosyen 2
neon21
uranum-22
Answers
Answer:
neon 21 ang sagot diyan
Explanation:
iyan ang sagot ko its a frank hindi yan ang sagot ko
2.At 35°C, a small sample of methane gas (CH4) has a volume of 1.5 liters. The temperature of the methane gas is slowly cooled to 17°C. What is the new volume of the methane sample?
Answers
Answer:
V₂ = 1.41 L
Explanation:
Given data:
Initial temperature = 35°C (35 +273.15 K = 308.15 K)
Initial volume = 1.5 L
Final temperature = 17°C (17+273.15 K = 290.15 K)
Final volume = ?
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 1.5 L × 290.15 K / 308.15 k
V₂ = 435.23 L.K / 308.15 k
V₂ = 1.41 L
What is the part of the male reproductive organ that stores newly-formed sperm cell?
A. Testes
B. Epididymis
C. Vas Deferens
D. Urethra
Please explain(clearly) your answer Thank you
Answers
Answer:
B. Epididymis
Explanation:
Sperm are stored in the epididymis until fully developed. The epididymis is located on the back part of the testis, the male’s reproductive organ.
Hydrogen is placed separately from the other elements in the periodic table because it
A. Is a gas
B. Has atomic number 1
C. Has many unique properties
D. Does not exist as a free element in nature
Answers
Hydrogen is the chemical element that is placed separately from the other elements because it has atomic number 1.
What is hydrogen?It is the simplest chemical element (consisting of only one proton and one electron) with atomic number 1.
It is the lightest of the elements and the most abundant in the universe and in the earth's crust, in the atmosphere, hydrogen is found as a colorless, odorless and flammable gas, in its molecular form H2.
Therefore, we can conclude that Hydrogen is the chemical element that is placed separately from the other elements because it has atomic number 1.
Learn more about hydrogen here: https://brainly.com/question/4630891
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What is (3 X 10^3) +(2.5 X 10^6)? *
Answers
Answer:
Scientific Notation: 2.503 × 10⁶
Standard Form: 2,503,000
Hey there!
[tex]\mathsf{(3 \times 10^3) + (2.5 \times 10^6)}[/tex]
[tex]\mathsf{= 3 \times 10^3 + 2.5 \times10^6}[/tex]
[tex]\mathsf{10^3}[/tex]
[tex]\mathsf{= 10 \times 10 \times 10}[/tex]
[tex]\mathsf{= 100 \times 10}[/tex]
[tex]\mathsf{\bf = 1,000}[/tex]
[tex]\mathsf{10^6}[/tex]
[tex]\mathsf{= 10 \times 10 \times 10 \times 10 \times 10 \times 10}[/tex]
[tex]\mathsf{= 100 \times100 \times100}[/tex]
[tex]\mathsf{= 10,000\times100}[/tex]
[tex]\mathsf{= \bf 1,000,000}[/tex]
[tex]\mathsf{= 3\times 1,000 + 2.5 \times 1,000,000}[/tex]
[tex]\mathsf{3\times1,000}[/tex]
[tex]\mathsf{\bf = 3,000}[/tex]
[tex]\mathsf{2.5 \times 1,000,000}[/tex]
[tex]\mathsf{\bf = 2,500,000}[/tex]
[tex]\mathsf{3,000 + 2,500,000}[/tex]
[tex]\mathsf{= \bf 2,503,000}[/tex]
[tex]\boxed{\boxed{\large\textsf{Answer: } \mathsf{ \bf 2,503,000 \ or \ 2.503 \times 10^6}}}\huge\checkmark[/tex]
[tex]\large\textsf{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
24. Two boys were each pushing a box to the right, one boy applied a force of 3N and
the other boy applied a force of 5N. Another boy was pushing the box to the left
with a force of 8N. What was the net force of the box?
Answers
Answer:
Explanation:
Two boys were each pushing a box to the right, one boy applied a force of 3N and the other boy applied a force of 5N.
Total force applied to the left = 3 + 5 = 8 N . The forces are added up because they act in the same direction .
Another boy was pushing the box to the left with a force of 8N.
8 N force acts opposite to the total force of 8 N exerted by two earlier boys so
net force = 8N - 8N = 0 .
Net force on the box = 0 .
A gas occupies a volume of 0.20 L at 25 kPa. What volume will the gas occupy at 2.0 kPa?
Answers
Answer:
2 L
Explanation:
which statement correctly describes the relationship between a blackbody radiator, its temperature, and the electromagnetic radiation it gives off?
a. as the blackbody radiator becomes warmer, it emits light of shorter wavelength
b. as the blackbody radiator becomes cooler, it emits light of shorter wavelength
c. as the blackbody radiator becomes warmer, it reflects different wavelengths of light
d. as the blackbody radiator becomes warmer, it emits random wavelengths of light
Answers
Answer:
its not c because i just took the test and i got it wrong
Explanation:
Answer:A
Explanation:
The energy stored in chemical bonds is known as
chemical energy
O electromagnetic energy
O thermal energy
O kinetic energy.
Answers
Answer: chemical
Explanation:
Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy. Except at absolute zero (the coldest temperature it is possible to reach), all molecules move.
Which of the following does NOT contain a covalent bond?
á Cao
b H2
CHCI
d HCN
e C6H12O6
f CO2
Answers
Answer:
b.h2
i think it is.i am not sure.
Among the following the molecule which does NOT contain a covalent bond is CaO Hence correct option is (A).
What is Covalent bond ?Covalent bond, in chemistry, the interatomic linkage that results from the sharing of an electron pair between two atoms.
As in CaO , Ca is considered as Metal which has Electron donor nature hence it will donate electron to Oxygen.
Whereas Oxygen Considered as Non metal as it gains electron. which has electron gainer nature.
Ca donates electron and Oxygen gains electron. Thus, the bond formed between both will be the Ionic bond which is formed by the transfer of Electron.
Therefore, Among the following the molecule which does NOT contain a covalent bond is CaO Hence correct option is (A).
Learn more about Covalent bond here ;
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An atom of carbon (C) forms covalent bonds with two atoms of oxygen (O) to form carbon dioxide. How are the valence electrons of these atoms rearranged to form the bonds?
Electrons are transferred from the carbon atom to the oxygen atoms.
Electrons are transferred from the oxygen atoms to the carbon atoms.
Many valence electrons are shared between the atoms.
A few valence electrons are shared between the atoms.
Answers
Answer:
Many valence electrons are shared between the atoms.
Explanation:
For the atoms to form a covalent bond, a many of the valence electrons are shared between the atoms.
When a covalent bond is to be formed, the valence electrons which are the outermost electrons are shared between the atoms that are combining.
Carbon is made up of 4 valence electrons. Oxygen is made up of 6 valence electronsFor both atoms to be isoelectronic with the noble gases, carbon shares all of its 4 electrons with oxygen. Oxygen bonds shares 4 electrons using two of its atom with the carbon.Answer:
c
Explanation:
on edge
What is Li2SO4???????
Answers
Answer:
Lithium sulfate
Hope this helps.
Explanation:
Answer:
Lithium sulfate
Explanation:
A white inorganic salt with the formula Li₂SO₄. It is the lithium salt of sulfuric acid.
What does oxygen and sulfur make?
Answers
Answer: sulfur dioxide
Explanation:
Question
The illustration below uses arrows to show how Earth's tectonic plates move.
Oceanic crust
B
tenen
Lithosphere -
Continental crust
Lithosphere
A
As thenosphere
Which statement below best describes where and why a particular type of rock may be found?
O Metamorphic rock may be found at location B, where magma escapes from the area where oceanic crust dives under continental crust.
O Sedimentary rock may be found at location B, where rock has been weathered by water to form sand.
Sedimentary rock may be found at location A, where it is formed from melting and solidifying sediments.
O Metamorphic rock may be found at location A, where pressure and heat is supplied by the layers above.
Answers
Answer: a
Explanation:
2344
The statement that best describes where and why a particular type of rock may be found is that Metamorphic rock may be found at location B, where magma escapes from the area where oceanic crust dives under continental crust.
What is Tectonic Plate?A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.
They are made up of oceanic crust and continental crust. Earthquakes occur around mid-ocean ridges and the large faults which mark the edges of the plates.
Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest.
Therefore, The statement that best describes where and why a particular type of rock may be found is that Metamorphic rock may be found at location B, where magma escapes from the area where oceanic crust dives under continental crust.
Learn more about Tectonic Plates, here:
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In an exothermic reaction, what happens to the surroundings?
O A. The temperature decreases.
B. The activation energy is restored.
C. The temperature increases.
D. The thermal capacitance is increased.
Answers
calculate the mass in grams of 1 mole of iron
Answers
Answer:
1 mole is equal to 1 moles Iron, or 55.845 grams.
Write the equation for the dissolution of magnesium chlorate in water. How many moles of ions are produced for every 1 mol of magnesium chlorate dissolved. H2O Mg(ClO3 ) 2 (s) ⟶
Answers
Answer:
Explanation:
Mg(ClO₃ )₂ (s) ⇄ Mg⁺² + 2ClO₃⁻
1 mole 1 mole 2 mole
Mole of magnesium ion produced = 1 mole .
Mole of chlorate ion produced = 2 mole .
Total moles of ion produced = 2 + 1 = 3 moles .
How are earthquakes, volcanoes, and tsunamis related to the ring of fire?
Answers
Answer:
they are not................
Answer: The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area. Along much of the Ring of Fire, plates overlap at convergent boundaries called subduction zones. That is, the plate that is underneath is pushed down, or subducted, by the plate above
Explanation:
Data collected that describes the quality of the data set is called _______ data.
quantitative
qualitative
mode
mean
An investigation where you compare objects to find a relationship is a(n) _______.
control group
descriptive investigation
comparative investigation
If the number 5 occurs with the most frequency in the data set, it is called the _________.
qualitative
mode
mean
median
Answers
Answer:
1. Qualitative.
2. Comparative investigation.
3. Mode.
Explanation:
1. Data collected that describes the quality of the data set is called qualitative data. This data type are non-numerical in nature i.e they are categorical. Some examples are excellent, poor, gender, religion etc.
2. An investigation where you compare objects to find a relationship is a comparative investigation. For example, a researcher trying to find out which bag is heavier by determining their weight.
3. If the number 5 occurs with the most frequency in the data set, it is called the mode.
For example, given A = (1, 5, 2, 5, 1, 5 4, 5). The mode is 5 because it appeared the most i.e four (4) times.
How many grams would 6.02 x 10^23 atoms of Ca be?
Answers
Answer:
sorry I just need points
