Answers
Answer:
7.25 x 10^47
Explanation:
1.204 x 10^24 moles*6.022 x 10^23 avogadro's number= 7.25 x 10^
Two atoms of the element join together at ordinary temperature and pressure to generate dioxygen. Therefore, the correct option is option A.
What is oxygen?The chemical substance with symbol O as well as atomic number 8 is oxygen. It is a component of the periodic table's chalcogen group, a strong oxidizing nonmetal, as well as an oxidizing agent which quickly produces oxides for most elements and other compounds. Oxygen is the most prevalent element on Earth, and it is the third-most plentiful element in the universe after hydrogen and helium.
Two atoms of the element join together at ordinary temperature and pressure to generate dioxygen, a colorless as well as fragrant diatomic gas with both the formula O 2. Diatomic oxygen gas now makes up 20.95% of the Greenhouse effect, however this has fluctuated dramatically throughout time. Oxygen oxides represent more than half of both the Earth's crust.
mole = number of atoms/ 6.022×10²³
= 1.204 x 10²⁴/ 6.022×10²³
= 2 mole
Therefore, the correct option is option A.
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Related Questions
Photosynthesis is a cell process used by various organisms. Which of the following best
describes the process of photosynthesis? (SC.8.L.18.1)
A.Carbon dioxide and water are turned into sugar and oxygen.
B.Sugar and oxygen are turned into water and carbon dioxide.
C.Oxygen and carbon dioxide are turned into water and sugar.
D.Water and sugar are turned into oxygen and carbon dioxide.
Answers
Answer:
Carbon dioxide and water are turned into sugar and oxygen
Convert 65.4 m to mm.
Helppp please
Answers
Answer:65.4 meters= 65400 millimeters
Hope this helps
A student says that since the atomic theory is just a theory, it should not be considered useful. Which statement best argues against the student's opinion? (2 points) Scientific theories change over time. Scientific theories are the results of many experiments and observations. Scientists often do not agree about specific details of scientific theories. Scientists often propose competing theories. Scientific theories do not become Scientific Laws.
Answers
Answer:
Scientific theories are the results of many experiments and observations.
Explanation:
I think this is ti sorry if I'm wrong :|
This molecule can be synthesized from an alkyne anion and an alkyl bromide. However, there are two ways in which this molecule can be formed. One way uses a higher molecular weight alkyne anion (Part 1) and the other uses a lower molecular weight anion (Part 2). Draw the two versions in the boxes below. Omit spectator ions.
For Part 1: Draw the reactants (i.e., alkyne anion and alkyl bromide) needed for the pathway that uses a higher molecular weight alkyne anion:
For Part 2: Draw the reactants (i.e., alkyne anion and alkyl bromide) needed for the pathway that uses a lower molecular weight alkyne anion:
Answers
Answer:
See explanation below
Explanation:
First of all, we need to know the molecule that need to be synthesized. In the first picture attached, we have the molecule.
Now, according to that, the molecule can be formed in two ways. Both ways are rather different but we have one thing in common in both ways, and it's the fact that both ways requires the reaction with an alkyne. In one way, with the higher MW and the other with the lowest.
For the first way, when we need to use the higher MW, all we need to do is to put the triple bond in the highest molecule, in this case, a molecule that include the benzene ring, and the other reactant will be the alkyl bromide. You can see the picture of this product below, (Picture 2).
For the second way, the triple bond should be located in the lowest MW, in this case an ethyl group, instead of the benzene ring, and the molecule with the benzene ring would have the bromide. In both cases we will have the same product. See picture 2 for this.
Hope this helps
The temperature of a 10g sample of iron was raised by 25.4ᵒC with the addition of 114 J
of heat. What is the specific heat of iron?
Answers
Answer:
28956J
Explanation:
Specific heat capacity is equal to mass × heat capacity × temperature change
Shc = mCtheta
= 10 × 114 ×25.4
= 28956J
You have a 5M stock solution of NaCl (Formula Weight: 58.44g/mole), a 0.25M stock solution of glucose (Formula Weight; 180.156g/mole), and a bottle of solid Tris base (Formula Weight: 121.1g/mole). How would prepare (be specific) 250mL of a single solution containing 150mM Tris, 25mM glucose, and 150mM NaCl. g
Answers
Answer:
4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL
Explanation:
To prepare the single solution we need to find the moles of each solute (Tris, glucose and NaCl) from the stock solutions anf the solid:
Moles Tris:
0.250L *(0.150mol / L) = 0.0375moles Tris * (121.1g/mol) = 4.54g of Tris base must be added
Moles glucose:
0.250L * (0.025mol/L) = 6.25x10⁻³mol glucose * (1L / 0.25mol) = 0.025L = 25mL of the 0.25M stock solution of glucose must be added
Moles NaCl:
0.250L * (0.150mol / L) = 0.0375mol NaCl * (1L / 5mol) = 0.0075L =
7.5mL of the 5M stock solution of NaCl
You must add:
4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL
What is the biggest difference between thermal energy and temperature?
Answers
Answer:
Heat deals more with thermal energy whereas temperature deals with molecular kinetic energy.
2. How do chemical weathering and deposition contribute to the formation of the features shown here?
answer asap
Answers
Answer:
Explanation:
Chemical weathering of rocks and minerals is a key factor that mitigates acidic deposition and affects water chemistry. It supplies cations and alkalinity to the surface water, groundwater, ion-exchange complex, and vegetation in the watershed.
Hopefully this will help
What are the missing coefficients for the skeleton equation below? Cr(s) + Fe(NO3)2(aq) → Fe(s) + Cr(NO3)3(aq)
Answers
Answer:
2 3 3 2
Explanation:
Many food chains together create a______
Answers
hope this helps,, have a nice day :))
what is the force on a 1,000 kg elevator that is falling freely at 9.8 m/s2
Answers
Answer:
The only force on it is its weight, w=9800N
Explanation:
Name each of the following species for the following acid-base reactions. (The equilibrium lies to the right in each case, i.e., the product side is favored. If the species is an ion, include the word "ion" in the name. Use systematic names such as "methanol" instead of archaic names like "methyl alcohol" or "wood alcohol".)
(a) H3O+ (hydronium ion) + CH3O- (methoxide ion) <--> *reverse reaction arrow*
acid:?
base:?
conjugate acid:?
conjugate base:?
(b) CH3CH2O- (ethoxide ion) + HCl (hydrogen chloride) <--> *reverse reaction arrow*
acid:?
base:?
conjugate acid:?
conjugate base:?
(c) NH2- (amide ion) + CH3OH (methanol) <--> *reverse reaction arrow*
acid:?
base:?
conjugate acid:?
conjugate base:?
Answers
Answer: a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]
acid : hydronium ion
base : methoxide ion
conjugate acid : methanol
conjugate base: water
b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]
acid : hydrogen chloride
base : ethoxide ion
conjugate acid : ethanol
conjugate base: chloride ion
c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]
acid : methanol
base : amide ion
conjugate acid : ammonia
conjugate base: methoxide ion
Explanation:
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
The species accepting a proton is considered as a base and after accepting a proton, it forms a conjugate acid.
The species losing a proton is considered as an acid and after loosing a proton, it forms a conjugate base
For the given chemical equation:
a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]
acid : hydronium ion
base : methoxide ion
conjugate acid : methanol
conjugate base: water
b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]
acid : hydrogen chloride
base : ethoxide ion
conjugate acid : ethanol
conjugate base: chloride ion
c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]
acid : methanol
base : amide ion
conjugate acid : ammonia
conjugate base: methoxide ion
.
A student increases the temperature of a 200 cm3 balloon from 60°C to 100 °C.
What will the new volume of the balloon be? Round your answer to one decimal
point.
(to convert Celsius to Kelvin, add 273.15)
Answer?
Answers
Answer:
178.56 cm3
Explanation:
V1/T1=V2/T2
V2=V1T1/T2
V1 (volume) is 200 cm3
T1 (temperature) is 60°C but convert into Kelvin
T2 (temperature) is 100 °C but convert into Kelvin
Plug in the values...
V2= (200 cm3)(60+273.15)/ (100+273.15)
V2=178.56 cm3
Answer:
178.56 cm3
Explanation:
Calculate the work done when 1.000 mole of a perfect gas expands reversibly from 1.0 L to 10 L at 298.0 K. Then, calculate the amount of work done when the gas expands irreversibly against a constant external pressure of 1.00 atm. Compare the two values and comment.
Answers
Answer:
See explanation
Explanation:
For work done at constant temperature;
w = -nRTln(V2/V1)
V1 = 1.0 L
V2 = 10 L
w = -(1 * 8.314 * 298) ln(10/1)
w = -5704.8 J
When the gas expands irreversibly against a constant external pressure;
w = -(PΔV)
w = -(1.00 (10 - 1))
w = - 9 J
During expansion of a gas in which the initial and final limits of volume are given, the constant pressure process produces more work than the isothermal process as we have seen above.
Organelles_____are specialized structures that carry out particular jobs and functions?
Answers
Answer:
Cell or cellular
Explanation:
Heyy!! Not sure, but cell and cellular are the same. They carry out particular jobs and functions. Hope this helps, thank you :) !!
This is for science! I really need help.
Answers
Answer
Solid
liquid
Gas
Explanation:
the three states of matter are solid, liquid, and gas
as earth cooled and formed a planet, LESS dense elements and compounds separated and formed layers around a DENSE core. Is this true or false?
Answers
Answer:
True
Explanation:
The core of the earth is very dense so that leads me to beleive that the answer is true.
What is the mass of an object if its potential energy is 800 J and it is 2.0 m above the ground?
Answers
Answer:
potential energy = mgh put values and get your answer
wright it in 500 words Submit your persuasive essay about nuclear power. Remember to proofread your work before submitting.
Answers
Answer:
Explanation:
Introduction Paragraph. Hook. Background Points. Thesis Statement.( done)
Body Paragraph. Topic Sentence. Supporting fact 1. Supporting fact 2. Transition Sentence.(done)
Conclusion Paragraph. Re-statement of Thesis. Summary of Main Point. Challenge to the Reader.( done)
How does an atom become a positively charged ion?
Answers
The table shows the temperature and pressure of five-liter samples of four different gases. Which two gas samples do not have the
same number of molecules?
Answers
Answer:He2 & O2
Explanation:
Answer:
Answer:A
Explanation:
why
do real gases
divrate from the
Ideal
gas
law
Answers
A sample of a mixture of salt and sugar has a total mass of 0.8920 g. If the sample contains 0.0982 g of salt, what percent of the sample is sugar?
Answers
Answer:
89%
Explanation:
The computation of the sample percentage is sugar is shown below:
As we know that
The mass of the total sample mixture is
= Mass of salt + mass of sugar
= 0.8920
And, the mass of salt is 0.0982 g
So, the mass of sugar is
= 0.8920 - 0.0982
= 0.7938 g
Now the percentage of the sample is sugar is
= 0.7938 ÷ 0.8920
= 89%
How many formula units are in 4.52 moles of H3SO3?
Type your answer
Answers
Answer:
The answer is 98.07848. We assume you are converting between grams H2SO4 and mole. You can view more details on each measurement unit: This compound is also known as Sulfuric Acid. The SI base unit for amount of substance is the mole. 1 grams H2SO4 is equal to 0.010195916576195 mole.
Quick conversion chart of moles H2SO3 to grams
1 moles H2SO3 to grams = 82.07908 grams
2 moles H2SO3 to grams = 164.15816 grams
3 moles H2SO3 to grams = 246.23724 grams
4 moles H2SO3 to grams = 328.31632 grams
5 moles H2SO3 to grams = 410.3954 grams
6 moles H2SO3 to grams = 492.47448 grams
7 moles H2SO3 to grams = 574.55356 grams
8 moles H2SO3 to grams = 656.63264 grams
9 moles H2SO3 to grams = 738.71172 grams
10 moles H2SO3 to grams = 820.7908 grams
When something heats up, new energy is created, and when something cools down, energy is destroyed. Please help! this is science not chemistry.
Answers
Answer:
False
Explanation:
This isn't true. Energy is neither created nor destroyed. Heating something makes the particles move faster, but no new energy is created. Cooling results in slower particles, but once again, no energy loss.
The given statement "when something heats up, new energy is created, and when something cools down, energy is destroyed" is absolutely false.
Why energy is not destroyed in a closed system?According to the first law of thermodynamics which states that the energy of a closed system must always remain constant. It can neither be created nor destroyed without any interference from outside. This is the principle of physics.
The same concept is described by chemistry through the name known as The law of conservation of energy. This states that in a chemical reaction energy can never be created or destroyed.
When you heat up something, the movement of particle increase, not energy. Similarly, when you cool down something, the movement of particles or atoms within that decreases, not energy.
Therefore, the given statement "when something heats up, new energy is created, and when something cools down, energy is destroyed" is absolutely false.
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Convert 0.859 mg to cg.
Help me plz :(
Answers
Answer:
0.0859
Explanation:
The most important commercial ore of chromium is chromite (FeCr2O4). One of the steps in the process used to extract chromium from the ore is the reaction of chromite with coke (carbon) to produce ferrochrome (FeCr2). 2 C(s) FeCr2O4(s) FeCr2(s) 2 CO2(g) What mole ratio would you use to convert from moles of chromite to moles of ferrochrome
Answers
Answer:
1 mole FeCr2/ 1 mole FeCr2O4
Explanation:
We have to write down the equation of the reaction before we can answer the question;
2C(s) + FeCr2O4(s) -------> FeCr2(s) + 2CO2(g)
By inspection of this reaction equation, we can clearly see that the mole ratio of the reactants and products is 2:1:1:2.
Specifically, the ratio of chromites to ferrochrome is 1:1
Hence;
The mole ration required to convert chromites to ferrochrome is;
1 mole FeCr2/ 1 mole FeCr2O4
Classify each chemical reaction:
reaction
1. CH3CH2OH(f) → 3O2g + 2CO2 + 3H2Og
a. combination
b. precipitation
c. single replacement
d. combustion
e. double replacement
f. acid-base decomposition
2. MgI2 (aq) + Pb(NO3)2(aq) → Mg(NO3)2(aq) + PbI2(s)
a. combination
b. precipitation
c. single replacement
d. combustion
e. double replacement
f. acid-base decomposition
3. 16Ks + S8s → 8K2 + Ss
a. combination
b. precipitation
c. single replacement
d. combustion
e. double replacement
f. acid-base decomposition
4. CH4g + 2O2g → CO2g + 2H2Og
a. combination
b. precipitation
c. single replacement
d. combustion
e. double replacement
f. acid-base decomposition
Answers
Answer:
1) combustion
2) double replacement
3) combination
4) combustion
Explanation:
The combustion of a compound refers to the reaction of that compound with oxygen to produce heat and light. In reactions (1) and (4) above, ethanol and methane reacted with oxygen to yield carbon dioxde and water. This is a combustion reaction.
Reaction(2) is a double replacement reaction because the both cations exchange their anion partners in the product.
Reaction (3) is a combination reaction. It involves the joining of two elements to form a new compound.
The dependent variable in an experiment
A.never changes
B.will vary according to the temperature
C.shows changes during the experiment.
D.is always the larger value.
Answers
Answer:
C
Explanation:
How many moles of a gas would be held by a 6 L container of nitrogen gas at 2 atm and 300 Kelvin?
Answers
Answer:
I think you would have to multiply 6 times 2, which it equals 12. And then just divide it by 300, and that's your answer. Hope I was able to help!
Explanation: Have a good day!