Answer:
Yes, this statement is true. The sun moves across our sky from east to west.
Explanation:
(fun fact: on Mars the sun moves across the sky from west to east!)
A sample of iron contains 2.806 x 1024 atoms of iron (Fe). How many moles of iron are in the sample?
Answer:
Approx. 20 moles of iron.
Explanation:
There are approx. 6.022 x 10.23 iron atoms per mole of iron. In this quantity, The number of iron atoms has a mass of
55.85 ⋅ g.
Identify the volume the gas will occupy at STP: 12.12 moles of O2
This problem is providing us with the number of moles of oxygen in a gas sample as 12.12 mol. Thus, the volume those moles occupy is required and found to be 271.5 L.
Ideal gasesIn chemistry, we study ideal gases under the assumption of no interactions among gas molecules, therefore the widely accepted equation, known as the ideal gas equation, we use to study the moles-pressure-temperature-volume relationship is:
[tex]PV=nRT[/tex]
Now, this problem gives n and asks for V at STP, which stands for standard temperature and pressure, taking the values of 273 K and 1 atm, respectively. Hence, we solve for the volume as follows:
[tex]V=\frac{nRT}{P}[/tex]
Thereafter, we plug in the numbers to obtain:
[tex]V=\frac{12.12mol*0.08206\frac{atm*L}{mol*K}*273K}{1atm}\\\\V=271.5L[/tex]
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This is the equation for the dissociation of ammonia gas at 293 K. Delta. H = 145 kJ and Delta. S = 195 J/k. 2NH3(g) Right arrow. N2(g) 3H2(g) Which correctly states the Delta. G for this dissociation and whether the process is spontaneous or nonspontaneous? Use Delta. G = Delta. H – TDelta. S. –87. 87 kJ, spontaneous –50 kJ, spontaneous 87. 9 kJ, nonspontaneous 202. 14 kJ, nonspontaneous.
The delta G for the dissociation is 87,865 joule/kg.
The process is non-spontaneous because the value of Gibbs free energy is positive.
What is dissociation?The breaking up of a compound into a simpler form that can be recombined under other conditions.
Given,
[tex]\bold{2NH_3 (g) = N_2(g) + 3H_2(g)}[/tex]
H = 145 kJ
Delta S = 195 J/k
Determining the G using the following process:
G = H -TS
[tex]\bold{G = (145\times10^3 J) -(293K \times 195 J/K})[/tex]
G = 87,865 Joules/K
Thus, the value of Delta G is 87,865 and the process is non-spontaneous.
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Answer:
C. 87.9 kJ, nonspontaneous
Explanation:
just did the quiz
Place the following from smallest to largest
heumatom
carbon-14 atom
electron
proton
glucose molecule
Answer:
i think electron but not sure ans
Answer:
Range
Explanation:
glucose molecule
Proton
heumatom
electron
carbon-14 atom
What is the total number of atoms represented in the
formula CuSO4.5H,0?
Answer:
you have ten hydrogen atoms and five oxygen atoms in total
Explanation:
hope this helps
Consider the reaction Cu + AgNO3 Ag + CUNO3 Which element is reduced? Which element is the oxidizing agent?
Answer:
Ag is both reduced and the oxidizing agent.
Explanation:
Ag is the answer for both
Cu + AgNO₃ → Ag + CuNO₃
Cu is a reducing agent, and AgNO3 is an oxidizing agent.
What is an oxidizing and a reducing agent?Oxidizing agent:In a chemical process, an oxidizing agent, also known as an oxidant, obtains electrons and becomes reduced. The oxidizing agent often referred to as the electron acceptor, is typically in one of its higher oxidation states since it will receive electrons and be reduced.
Reducing agent:In a chemical process, a reducing agent, also known as a reductant, loses electrons and is oxidized. The electron donor is a reducing substance, which is normally in one of its lower oxidation states. A reducing substance undergoes oxidation because of the redox reaction's electron loss.
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difference between a compound and a mixture , Simple and short answer please!!
A 10 kg shotgun accelerates 0.025 kg of buckshot from rest to a speed of 100 m/s in a distance of just 0.5 m. How much force is used to accelerate the shot? How much force does the gun recoil with?
Answer:
v'2 is the final velocity of the bullet
Explanation:
I had the question and found it on Chegg so credits to him/her
Using Boyle’s Law, calculate the new volume of the weather balloon at a higher altitude. Assume the volume of the balloon at ground level is 10.0 m3 where the atmospheric pressure is 1.00 atm. What will be its new volume at an altitude of 15 km where the atmospheric pressure is 0.350 atm?
Answer:
Explanation:
V1 = 10 m^3
P1 = 1.00 atmospheres
V2 = ?
P2 = 0.35
Formula
V1 * P1 = V2 * P2
Solution
10 * 1 = x * 0.35 Combine the left and divide both sides by 0.35
10/0.35 = x
x = 28.57 m^3
in a sealed and rigid container, a sample of gas at 2.00 atm and 25.0 °c is heated to 50.0 °c. what is the pressure (in atm) of the gas at 50.0 °c?
We have that the the pressure (in atm) of the gas at 50.0 °c is mathematically given as
P2= 2.17 atm
Gay-Lussac's lawThe Gay-Lussac's law states that pressure exerted by gas is directly proportional to the absolute temperature of the gas.
Generally the equation for the Gay-Lussac's law is mathematically given a
P1 / T1 = P2 / T2
Therefore
T1 = 25C
T1= 25 + 273
T1= 298 K
And
T2 = 50C
T2= 50 + 273
T2= 323 K
Therefore
[tex]P2 = \frac{2.00 x 323}{298 }[/tex]
P2= 2.17 atm
Hence, the pressure (in atm) of the gas at 50.0 °c is
[tex]P2 = \frac{2.00 x 323}{298 }[/tex]
P2= 2.17 atm
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Which type of chemical bond occurs when atoms share electrons, as shown in this diagram?.
Answer:
covalent bond
Explanation:
covalent bond, in chemistry, the interatomic linkage that results from the sharing of an electron pair between two atoms. The binding arises from the electrostatic attraction of their nuclei for the same electrons.
Of the bonds listed below the weakest bond is _______ and the strongest is ________. A strong bond is a (stable / unstable) bond 2(H—C ≡ C—H) 5(O = O) → 4 (O—C—O) 2 (H—O—H) 839 kJ/mol C ≡ C.
Diamonds and graphite are two forms of what nonmetal?.
Answer:
Carbon AtomsExplanation: Diamond and graphite are made out of carbon atoms. The difference between the two substance is the arrangement of the carbon atoms inside each one.
Answer:
Diamond and graphite are allotropes of carbon
Explanation:
» Diamond has tetrahedral edges associating through weaker vander waal forces of attraction, it is colorless and glittering, and it is very hard.
» Graphite has hexagonal edges associating vander waal forces, it is black in color and it is soft. Example of graphite is the black rod in a dry cell.
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If you had done the experiment hands-on and the environmental air pressure changed, how would your results have been affected?
Question 3 options:
There is not enough information to make a decision.
There would have been no effect, because air pressure changes would not be strong enough to change the lab results.
There would have been a change in the measurements of balloon volume because air pressure changes would have interfered with the results.
PLEASE HELP!!!
Boyle's law states the relationship between pressure and volume of a gas.
From Boyle's law, we know that volume and pressure of a given mass of gas are inversely proportional to each other. Hence, PV = k.
Now, in carrying out this experiment, the atmospheric pressure is assumed to be constant. If the atmospheric pressure changes during the experiment, here would have been a change in the measurements of balloon volume because air pressure changes would have interfered with the results.
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help would be much appreciated
Answer:
helium oxide + surfuric acid lithium carbon+ water
I don’t know what the correct answer is? Can anyone explain?
Short Answer:
C)
Long Answer:
A- When a solid is heated, it melts and becomes a liquid. (Another older term is Fusion.) An example of this is ice to water when you leave it outside the freezer.
B- When a liquid becomes a gas, it undergoes a process called boiling. Example: When you boil water, it becomes steam.
C- It is called deposition. Example: How snow forms in clouds.
Please help me
Continuing her study of soil, Mara wants to study the composition of some soil samples from two different regions of her state. She places one cup of each sample into a large jar. She slowly adds water until it is near the top. She stirs the water and the soil thoroughly, and then lets the soil sit overnight. She creates this image to record her results.
Compare the ratio of materials in the two soil samples and, based on your knowledge of soil formation, explain how the differences in soils possibly came about.
The soil in the first vessel that has the greatest amount of sand will be poor in organic matter while the other soil sample will be rich in organic matter.
What is soil?The soil is the outermost portion of the earth's crust on which plants grow. There are different types of soil such as;
Sandy soilClay soil Loamy soilHumus soilThe origin of each type of soil depends on the amount of organic matter that it contains. The soil in the first vessel that has the greatest amount of sand will be poor in organic matter while the other soil sample will be rich in organic matter.
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Answer:
the first jar is poor in nutriotion because it has less holding while the other is the oppossitye
Explanation:
What information is provided by the specific block location of an element?.
The block location of an element tells the energy sublevel of an element.
What is block location of an element?The term block location refers to the specific block in which an element is found in the periodic table. There are three blocks in the periodic table which are;
s - blockp - blockd - block and f - blockThe block location of an element tells the energy sublevel of an element.
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how large a volume is needed to contain 21 germs of sliver
Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. We calculate the volume as follows:
21 grams Ag ( 1 L / 10.5 grams ) = 2 L of container is needed for the given mass of silver
Hope this answers the question. Have a nice day.
What is the meaning of feedback mechanism in relation to homeostasis?
Answer:
A feedback mechanism is a physiological regulation system in a living body that works to return the body to its normal internal state, commonly known as homeostasis. ... The term “feedback mechanism” was first used in cybernetics to characterize a control system's ability to change its output in response to an input.
Explanation:
How many atoms are in 3.6 moles of carbon c atoms
Answer:
There are 2.17×10²⁴ atoms in 3.6 moles of carbon atom
Explanation:
No. of atoms = Mole × NA
= 3.6 × 6.022 ×10²³
= 2.17×10²⁴ atoms
A chemist prepares a solution of copper) sulfate (cuso4)by weighing out 29.9 g of copper ) sulfate into a 150 into a 150.mLvolumetric flask and filling the flask to the mark with water.
Lol Most people would say c but its A
How many neutrons are in an atom of chlorine-36?
a
19
b
need more information
c
17
d
36
Answer:
a 19
Explanation:
Cl-36 has 19 neutrons
17 protons
And 17 electrons
Explanation:
a. 19 neutrons
hope this helps you
have a nice day
Please help asap chemistry homework
Answer:
(See attachment below)
Explanation:
Answer: 4. 5.15 Moles
5. 6.02×10 atoms
. 7. 1.3545×10^23 atoms
8. 1.73075×10^22 atoms
. 10. 3.40499×110 atoms
How many electrons are in a neutral carbon-14 atom?.
Answer:
There are six electrons in a carbon-14.
What are the functions of digestive system
Answer:
ingestion, propulsion, mechanical breakdown, chemical digestion, absorption, and elimination.
Explanation:
Answer: to release waste and process the needed materials used for the construction, maintenance, and healing of the body.
Explanation: In food there are certain things that our body needs such as protein, our body chemically and physically breaks down the nutrients our body needs. Our body also needs a way to get rid of what we don't need through the excretory system.
According to Einstein, why does the photoelectric effect occur?The photoelectric effect is due to the release of electrons from atoms.The photoelectric effect changes with the emission of an atomic spectrum.The photoelectric effect is related to the number of electrons in the shells around a nucleus.The photoelectric effect has to do with the number of atoms in a material.
Answer:
Option A is the answer!
Explanation:
The photoelectric effect occur due to the release of electrons from atoms. Thus option A is correct.
What is photoelectric effect?The photoelectric effect is defined as a phenomenon in which electrically charged particles are released from or within a material when it absorb electromagnetic radiation.
It is also be defined as an emission of electrons when electromagnetic radiation hits the material.
It can be defined as a phenomena whereby light striking a metal surface causes electrons to be expelled from it.
The photoelectric effect is defined as a phenomena whereby electrons can be released from the surface of a metal when light shines on it.
Thus, the photoelectric effect occur due to the release of electrons from atoms. Thus option A is correct.
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Among the following scenarios, which best demonstrates resilience when confronted with stress?
Chance has experienced a sports-related injury. He copes with this by avoiding the advice of his trainer and continuing to try to perform his best on the field.
Antonio is presented with a project that is difficult to carry-out, but decides to view this project as a challenge that will also contribute to his personal growth.
Frank learns that he will be laid off from his job after working there for 15 years. He deals with his stress by confronting the company’s CEO with his feelings of anger and loss.
Monique is experiencing the loss of a relationship. To cope with this, she chooses to explain to people all of the ways that her former partner contributed to the demise of their relationship.
option A. best demonstrates resilience when confronted with stress.
What is stress?stress describes a person's physical or emotional reaction to the demands or pressures of daily existence. common causes of strain consist of paintings, money, relationships, and contamination.Acute stress.Episodic acute pressure.persistent stress.pressure is a feeling of emotional or physical tension. it is able to come from any event or concept that makes you sense frustrated, angry, or anxious. pressure is your frame's reaction to a task or demandLearn more about Stress here:-https://brainly.com/question/154477
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Into which type of reaction would a scientist have to infuse a lot of energy in order to cause the reaction to occur?
A) highly endothermic
B) slightly exothermic
C) slightly endothermic
D) highly exothermic
Answer:
HIGHLY ENDOTHERMIC
Explanation:
Endothermic and exothermic reactions are based on energy absorption and energy release when the product formation occurs in a chemical reaction.
Highly endothermic reactions will need a lot of energy.
What are the endo and exothermic reactions?The reaction in which the reactants absorbs the heat and energy from the system it is present to for the products is called the endothermic reaction.
The chemical reaction in which the heat is produced when the products are created is called the exothermic reaction.
Therefore, option A is correct.
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What is the biggest human advancement that has happened on earth?
Answer: Glass
Explanation: It helps us drive if we didnt have it then we would have to blink a lot more while driving which would result in a lot more people getting in to car crashes imagine plaines without windows or glass.
