Chemistry High School

Which must be the same when comparing 1 mol of oxygen gas, O2, with 1 mol of carbon
monoxide gas, CO?

a)the mass
b)the volume
c)the number of molecules
d)the number of oxygen atoms

Answers

Answer 1
c the number of molecules
Answer 2

Answer : The correct option is, (C)the number of molecules

Explanation :

When we are comparing 1 mole of oxygen gas [tex](O_2)[/tex] with 1 mole of carbon monoxide gas [tex](CO)[/tex] then we conclude that,

In 1 mole of oxygen gas [tex](O_2)[/tex], there are two number of molecules of oxygen.

In 1 mole of carbon monoxide gas [tex](CO)[/tex], there are two number of molecules (carbon and oxygen).

Hence, the number of molecules must be the same when comparing 1 mole of oxygen gas, with 1 mole of carbon monoxide gas.

Related Questions

Demonstrate your knowledge of waves.Describe the difference between mechanical and electromagnetic waves. Give an example of each kind of wave related to telecommunications. Answer using complete sentences and key vocabulary

PLEASE HELP

Answers

There are some methods that differentiate waves; one thing is by its medium. Electromagnetic waves did not require a medium for transmission such as in a vacuum while mechanical waves require a medium to travel such as air, water or anything that can serve as a transmission aid.  

The most common sample of EM waves in telecommunication is radio, light and infra-red signals. An example of a mechanical wave is a sound wave, which requires air to travel. Oscillating molecules made the sound waves. 

What is the pressure exerted by 3.00 mol of ar gas with a volume of 50.0 l at 25.0ºc (298.2 k)?

Answers

U should use pv=nRT.. this is the gas equation

I need help, the longer I look at this question the more I confuse myself!!!
Consider the unbalanced equation:
HC2H3O2 (aq) +Ba(OH)2 (aq) --> H2O (l) +Ba(C2H3O2)2 (aq)

balance the equation and determine how many moles of Ba(OH)2 are required to completely neutralize 0.461 mole of HC2H3O2.

Answers

The balanced equation is:
 2C2H4O2 + Ba(OH)2 --> 2H2O + Ba(C2H3O2)2
 The molar ratio between Ba(OH)2 and C2H4O2 is 1 to 2 (seen from the balanced equation). Thus, when we set the proportion --> 0.461:x = 2:1; x=0.2305mol of Ba(OH)2 is needed to neutralize 0.461 mole of HC2H3O2.

Which is the correct symbol for the atom with 42 protons and 49 neutrons?

Answers

Explanation:

Number of protons present in an atom are actually the atomic number of atom. Each element will have different atomic number.

Hence, each element is different in nature. On the other hand, atomic mass is the sum of number of protons and number of neutrons present in an element.

For example, Molybdenum is the element with 42 protons and 49 neutrons. Molybdenum is represented by the symbol Mo.

Therefore, we can conclude that Mo is the correct symbol for the atom with 42 protons and 49 neutrons.

The correct symbol for the atom with 42 protons and 49 neutrons is ^91Mo.

Atomic notation explained.

The correct symbol for the atom with 42 protons and 49 neutrons is ^91Mo.

In atomic notation, the image for an component consists of the nuclear number (number of protons) as a subscript and the mass number (entirety of protons and neutrons) as a superscript.

For the given atom with 42 protons and 49 neutrons, the overall mass number is 42 + 49 = 91. Hence, the image for this particle is ^91Mo, speaking to the component Molybdenum (Moment) with a mass number of 91.

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Why carbontetra chloride exist in liquid form at room temperature?,

Answers

Carbon Tetrachloride or CCl4 has four Cl atoms attached to one C atom. Since the molecule is non-polar, they experience London forces. These forces are relatively higher than a gas like methane due to the electronegativity difference between C and Cl molecules.

Determine the number of moles of a gas which occupies 39.0mL at 27°C if the pressure is 107 kPa.
3.14 x 10-3 mol

5.52 x 10-3 mol

2.45 x 10-3 mol

1.67 x 10-3 mol

Answers

we can use the ideal gas law equation to solve for the number of moles present 
PV = nRT
P - pressure - 107 kPa
V - 39.0 x 10⁻⁶ m³
n - number of moles 
R - 8.314 Jmol⁻¹K⁻¹
T - temperature in K - 27 °C + 273 = 300 K
Substituting these values into the equation
107 000 Pa x 39.0 x 10⁻⁶ m³ = n x 8.314 Jmol⁻¹K⁻¹ x 300 K
n = 1.67 x 10⁻³ mol

Connect It Imagine that you can see the particles of ice, liquid water, and water vapor. Describe how these three states of water differ.

Answers

Particle of ice is much closer together. Particle of liquid water moves much more freely than ice but is still slower than water vapor. Particles of liquid water are also spaced out a bit farther than ice. Water vapor moves around fast and there are many of them. They are the most spread out.

How does a volcano form?

Answers

A volcano is formed when magma (Lava) spews up from deep within the earth. After each eruption the Volcano gets bigger and bigger, so basically after periods of time the volcano will get larger. Lava will rise in cracks in the earth or weak spots in the earths crust. The pressure is relieved thus resulting in a volcanic eruptions it forms the new crust and then eventually builds up in that spot making a volcano. They also form in places called hot spots and various other places.

magnesium reacts with aluminum chloride. if you have 40g of each, how many grams of Al can you make? what is the LR? how much excess is left over after the reaction takes place

Answers

Q1)
Magnesium reacts with AlCl₃ and displaces Al.
3Mg + 2AlCl₃ ---> 3MgCl₂ + 2Al
stoichiometry of Mg to AlCl₃ is 3:2
Mass of Al₂Cl₃ present - 40 g
Therefore number of Al moles - 40 g/ 133.3 g/mol = 0.3 mol
Mass of Mg present - 40 g
Therefore number of moles - 40 g/ 24.3 g/mol = 1.6 mol
If Mg is the limiting reactant;
number of AlCl₃ moles that react with 3 mol of Mg  - 2 mol
Therefore number of AlCl₃ moles with 1.6 mol - 2/3 x 1.6 = 1.07 mol
However only 0.3 mol of Al present, therefore Mg is in excess and AlCl₃ is the limiting reactant .

Q2)
stoichiometry of AlCl₃ to Al is 2:2 
SInce AlCl₃ is the limiting reactant, the amount of Al produced depends on the amount of limiting reactant present.
Number of AlCl₃ moles reacted - 0.3 mol
Since molar ratio of AlCl₃ to Al is 1:1
the number of Al moles produced - 0.3 mol
The mass of Al produced - 0.3 mol x 27 g/mol = 8.1 g

Q3) AlCl₃ is the limiting reactant. limiting reactant is the reagent which is fully used up in the reaction. Reagent in excess is the reactant which is present in excess, amount present is more than what is required for the reaction.
Number of AlCl₃ moles reacted - 0.3 mol
Number of Mg moles reacted with 2 mol of AlCl₃ - 3 mol
Therefore with 0.3  mol of AlCl₃ - 3/2 x 0.3 mol = 0.45 mol
Number of Mg moles present initially - 1.6 mol 
moles reacted - 0.45 mol
therefore excess moles left after the reaction - 1.6 - 0.45 = 1.15 mol

here are approximately 15 milliliters (mL) in 1 tablespoon (tbsp).

Which expression can be used to find the approximate number of milliliters in 3 tbsp?
1 tbsp x 15ml/3tbsp
1 tbsp x 3ml/15tbsp
3tbsp x 1 tbsp/15ml
3tbsp x 15ml/1tbsp

Answers

If there are 15 mL in 1 tablespoon, then 3 tablespoons should have triple the volume as originally stated.
   Note in all of the four choices, the units simplify to mL because tbsp x ml/tbsp = mL (tbsp/tbsp = 1)
   The second and third choice give ultimately the same, incorrect value. The fourth option gives an incorrect fraction - there are not 15 mL for every tablespoon. The correct answer is 1 tbsp x 15mL/3tbsp

Answer:

The correct option is 3tbsp x 15ml/1tbsp

Explanation:

According to the question, 15 milliliters (mL) is equivalent to 1 tablespoon (tbsp), how many milliliters will be equivalent to 3 tablespoons. Let use "X" as the unknown number of milliliters.

If 15 milliliters ⇒ 1 tablespoon

X milliliters ⇒ 3 tablespoons

cross multiply

15 mL × 3 tbsp ⇒ 1 tbsp × X mL

X mL = 15 mL × 3 tbsp/1 tbsp

2H2S + 3O2 mc008-1.jpg 2SO2 + 2H2O Which option gives the correct mole ratios?

Answers

Consider the balanced equation below.

2H2S + 3O2 ---> 2SO2 + 2H2O

Which option gives the correct mole ratios?
H2S:SO2 = 2:2 and O2:H2O = 3:2
H2S:SO2 = 2:3 and O2:H2O = 3:2
H2S:SO2 = 4:4 and O2:H2O = 5:4
H2S:SO2 = 4:6 and O2:H2O = 4:4



is the aswer   H2S:SO2=2:2 and O2:H2O=3:2

Lightning is a very large flow of electrical energy. Describe the type of energy that creates the electrical energy.
A) The electrical energy comes from the thermal energy stored up in the water molecules.
B) The electrical energy comes from the gravitational potential energy of the water molecules.
C) The electrical energy comes from the chemical potential energy of the water molecules in the clouds.
D) The electrical energy comes from the attraction between charges in the cloud and the ground creating an electric potential.

Answers

d..........................................

During lightning, the electrical energy comes from the attraction between electrical charges in the cloud and the ground generating an electric potential. Therefore, option (D) is correct.

What is lightning?

Lightning can be described as a naturally occurring electrostatic discharge in which two electrically charged regions, both in the atmosphere and the ground, temporarily neutralize themselves, causing the instantaneous release of energy.

Lightning occurs when the negative charges of electrons in the bottom of the cloud are attracted to the positive charges of the protons in the ground.

This discharge creates a wide range of electromagnetic radiation, from the heat created by the rapid movement of electrons, to brilliant flashes of visible light.

Lightning causes a sound of the shock wave which produces gases in the vicinity of the discharge experiencing an instant increase in pressure. Lightning takes place during thunderstorms as well as other kinds of energetic weather systems.

Therefore, the electrical energy during lightning produces the attraction between electrical charges in the cloud.

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When one atom of sodium (Na) combines with one atom of fluorine (F), they form the compound sodium fluoride (NaF). Which of the following best describes the arrangement of valence electrons in a bond between Na and F?

1. The valence electrons are shared equally between Na and F.
2. The valence electrons spend more time around the atom of Na.
3. The valence electrons spend more time around the atom of F.
4. The valence electrons are given up by the Na and gained by the F.

Answers

The correct answer is:  
____________________________________________________________

4)  "The valence electrons are given up by the Na and gained by the F. "
____________________________________________________________

Answer:

4. The valence electrons are given up by the Na and gained by the F.

Explanation:

Sodium and fluorine bond ionically, they do not share electrons. Instead, ionic bonding involves the each atom of the metal, sodium, giving up its one electron in it's valence shell to each atom of the non-metal, fluorine.

If a solution containing 51.429 g of mercury(ii) perchlorate is allowed to react completely with a solution containing 16.642 g of sodium sulfate, how many grams of solid precipitate will be formed?

Answers

Hg(No3)2  +NaSO4   --->2NaNO3  +  HgSO4(s)
calculate  the moles  of   each  reactant
moles=mass/molar  mass

moles of  Hg(NO3)2=  51.429g/  324.6  g/mol(molar  mass  of  Hg(NO3)2)=0.158  moles

moles Na2SO4  16.642g/142g/mol=  0.117  moles  of  Na2SO4

Na2SO4  is  the  limiting  reagent in  the   equation   and  by  use  mole  ratio  Na2So4  to  HgSO4  is  1:1   therefore  the  moles  of  HgSO4  =0.117  moles

mass  of  HgSO4=moles  x  molar   mass  of  HgSo4=  0.117 g x  303.6g/mol=  35.5212  grams

Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass? Antoine Lavoisier Dmitri Mendeleev Henry Moseley John Newlands

Answers

the answer is Henry Moseley

The answer is: Henry Moseley.

Henry Gwyn Jeffreys Moseley (1887–1915) proposed that the number of positive nuclear charges (protons) in atom is equal to its atomic number in the periodic table.

Mendeleev did not know about isotopes and he arranged the elements in order of increasing relative atomic mass.

For example, positions of iodine and tellurium were reversed in Mendeleev's table, because of different isotopes, but Moseley solved anomalies like this one.

A transverse and longitudinal wave combine to form __________. a sound wave a radio wave a surface wave an electromagentic wave

Answers

A transverse and longitudinal wave combine to form a Water Wave.
they combine to make a surface wave. hope this helps

Why is oxygen called a gas. Give two reasons.,

Answers

It does not have a volume or settled shape. Solids have a volume and settled shape. Liquids have a volume volume and their shape is based on their container. It can be compressed. Solids can not be compressed nor liquids.

An unknown compound has the empirical formula CH2O and a molecular mass of 180 amu. What is the molecular formula of the compound

Answers

the empirical formula gives the simplest ratio of whole numbers of components in the compound. Molecular formula gives the actual composition of elements in the compound.
empirical formula - CH₂O
Mass of one empirical unit = 12 + (1x2) + 16 = 30 a.m.u
We have to next calculate how many empirical units make up the molecular formula. For that we have to divide molecular mass by mass of one empirical unit.
Number of empirical units = 180 a.m.u / 30 = 6
There are 6 empirical units 
Therefore molecular formula = 6 x(CH₂O) = C₆H₁₂O₆
Molecular formula = C₆H₁₂O₆

Uranium is a metallic element that is used in nuclear reactors and nuclear weapons. the vast majority of uranium found on earth is in the form of uranium-238, an isotope with a mass number of 238, while the uranium that is used for nuclear reactors and weapons is uranium-235, an isotope with a mass number of 235. what is the atomic difference between uranium-235 and uranium-238? uranium-235 has three fewer protons than uranium-238. uranium-235 has three fewer neutrons than uranium-238. uranium-235 has three fewer electrons than uranium-238. uranium-235 has three fewer atoms than uranium-238.

Answers

Answer:

U-235 and U-238 are two radioactive isotopes of Uranium. The main difference between U-235 and U-238 is that the number of neutrons present in the U-235 nucleus is 143 whereas the number of protons present in the U-238 nucleus is 146.

Explanation:

At room temperature, the surface tension of water is 72.0 mJ·m–2. What is the energy required to change a spherical drop of water with a diameter of 1.20 mm to five smaller spherical drops of equal size? The surface area of a sphere of radius r is 4π r2 and the volume is 4π r3/3.

Answers

It is given that the surface area of sphere is 4 π r² and its volume is (4/3 π r³)
With a diameter of 1.2 mm you have a radius of 0.6 mm so the surface area about 4.5 mm² and the volume is about 0.9 mm³ 
The total surface energy of the original droplet is (4.5 x 10⁻⁶ m x 72) = 3.24 x 10⁻⁴mJ
The five smaller droplets need to have the same volume as the original so:
5 V = 0.9 mm³ so the volume of smaller sphere will equal 0.18 mm³
Since this smaller volume still have volume (4/3 π r³) so r = 0.35 mm
Each of the smaller droplets has a surface are = 1.54 mm² 
The surface energy of the 5 smaller droplet is then (5 x 1.54 x 10⁻⁶ m x 72) = 5.54 x 10⁻⁴ mJ
From this radius the surface energy of all smaller droplets is 5.54 x 10⁻⁴ and the difference in energy is (5.54 x 10⁻⁴) - (3.24 x 10⁻⁴) = 2.3 x 10⁻⁴ mJ
Therefore we need about 2.3 x 10⁻⁴ mJ of energy to change a spherical droplet of water of diameter 1.2 mm into 5 identical smaller droplets

Which metal atom below cannot form a cation of several different charges?

Answers

Missing question: Cr, Mn, Fe, Ba, Cu.
Answer is: Ba (barium).
Barium is metal from second group of periodic table of elements. Barium looses two electrons and has oxidation number +2.
Chromium has different oxidation numbers, usually +3 and +6, iron has oxidation numbers +2 and +3, copper +1 and +2 in their compounds.

Which of the following accurately describes the behavior of water when subjected to temperature change?

A. A mass of water will expand if heated from 0°C to 2°C.
B. The volume of water will increase if cooled from 3°C to 2°C.
C. The volume of water will decrease if heated from 6°C to 7°C.
D. A mass of water will contract if cooled from 1°C to 0°C.

Answers

I believe this is the best one:
B. The volume of water will increase if cooled from 3°C to 2°C.

I don't think D) because water expands from 4°C to 0°C

"When liquid water is cooled, it contracts like one would expect until a temp of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point."

The answer option which accurately describes the behavior of water when subjected to temperature change is: B. The volume of water will increase if cooled from 3°C to 2°C.

Water refers to a liquid molecule that is typically made up of two (2) main chemical elements in the following proportion;

Two atoms of hydrogen.One atom of oxygen.

Generally, the volume of water is directly proportional to its temperature.

Hence, an increase in the temperature of water causes the volume of water to increase because its molecules gain energy and move more rapidly, which in turn makes the water molecules to be further apart.

When water is cooled, it contracts (decrease in volume) until a temperature of approximately four degree Celsius (4°C) is reached and then it begins to expand (increase in volume) at lower temperatures (3°C to 2°C), until it reaches its freezing point, which is typically at zero degree Celsius (0°C).

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Balance equation Al(s)+__CuSO4(aq) = ____Al2(SO4)3(aq)+____Cu(s)

Answers

2Al +3CuSO4=Al2 (SO4)3+3Cu.

is the balanced equation.

HOPE IT HELPS YOU '_'
2 Aluminum
3 Sulfate
3 Copper

#1: Which of the following scientists came up with the first widely recognized atomic theory?

A. John Dalton

B. Antione Lavoisier

C. Robert Millikan

D. J.J. Thomson

***My answer: A. John Dalton
is that right??,

Answers

Yes that answer is correct. John dalton was an english scientist who lived during the 18th and 19th centuries and he is most famous for proposing the modern first widely recognized atomic theory. But, it is thought that his theory is influenced by the ideas of another scientist called Bryan Higgins .

What are 3 things you can do to increase the rate of dissolving?

Answers

Increase surface area
Increase temperature of solvent
Stir the solution

Bonus:
Increase pressure

Hope I could help you :)

#1: In an icy glass of lemonade, which of the following is the solvent?

A. lemon juice

B. ice

C. sugar

D. water

**my answer: D. water

is that right? :/ @chmvijay :)

Answers

In a solution, there are two components that is solvent and solute. Solute is one that is dissolved and solvent is one in which is used for dissolving solute or it can be said that it is the which is used for dissolving. So in the icy glass of lemonade, there is a substance that is used for dissolving solute and it will be water as it is used for dissolving solute.

What happens to the temperature of a thermometer near an endothermic reaction?

Answers

The temperature shown on the thermometer decreases,as the temperature of the surrounding area decreases. This is due to the energy which is being taken in from the surroundings for the reaction, so as to break the bonds.

what is quartz made of

Answers

silicon and oxygen  that is what quartz are made of 
A little late but silicon and oxygen

Snow melting in sunshine is an example of which type of change

Answers

it is physical change

In general, in which direction do convection cells in Earth's atmosphere move heat around the planet?
A. clockwise along the jet streams
B. from the equator toward the poles
C. from the surface to the upper atmosphere
D. from east to west, along with the westerlies,

Answers

A convection cell happens when density differences occur within a liquid or gas. The convection cells in Earth’s atmosphere are also called Hadley cells. The convection cells in Earth’s atmosphere move heat from the equator towards the poles. This helps balance the weather patterns.
The direction of the convection cells in Earth's atmosphere that moves heat arouund the planet is from the equator toward the poles. The answer is letter B. The movement from equator to the poles will warm the temperature.
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A school issues tokens to the children for good behavior. this issue of a token is an example of 5.What is another word for Lithogenous |-2x+6|=-8 absolute value equations What motivated arrhenius to calculate how changes in carbon dioxide might affect the climate? Most flat screen TVs today are made with an aspect ratio (ratio of the length to the height) of 16:9. Xenock Electronics' top selling TV is their 28-inch model, whose viewing area has a length of 24 inches and a height of 13.5 inches. This TV costs $226.99. They have three main competitors that claim to offer a better deal per viewing area. Phil's Supercenter claims their 18-inch model, whose viewing area length is of the length of Xenock's 28-inch model, is a better deal per viewing area at $152.99. Tyler's Electronics claims their 33-inch model, whose viewing area height is 20% taller than Xenock's 28-inch model, is a better deal per viewing area at $276.99. Beltre's Superstore claims their 82-inch model, whose viewing area dimensions are 300% as large as Xenock's 28-inch model, is a better deal per viewing area at $2,079.99. List the TV's in order of best deal per viewing area. Assume all TV's have the same aspect ratio. Benjamin Franklin is known for the famous line "Give me Liberty, or give me death!" Which couple is most apt to report the highest marital satisfaction? tonya and mark, who do not have children shanti and greg, who have children in elementary school pavitra and sameer, who have a teenage daughter beth and jonah, whose son has just left home but their daughters have not? When wilson returned to the united states in 1919 with the treaty of versailles, he found there was general popular support for the treaty. a. True b. False? What did President Johnson hope to accomplish with his Great Society programs? throughout history what cultrual practice contributed to spread of religouse belief Gray wolves disappeared from yellowstone national park because what are the mean,median ,mode and range of the data set given the altitude of lakes in feet -11, -28, - 17, -25, -28, -39, -6, and -46 help me plzzzz i will give u a medal Which statement best describes how light waves travel in a uniform medium? A.in straight linesB.in extending circlesC.in bent linesD.in shrinking ripples, Fill in the blank with the correct form of the verb in parentheses Juan ______ (tener) muchos pantalones By the time the fertilized human reaches the uterus, the rapidly dividing ball of cells, now known as a blastocyst, has separated into two sections. The inner group of cells will become the embryo. The outer group will become the cells that nourish and protect it. On contact, it will burrow into the uterine wall for nourishment. This process is called A pathway by which a chemical element or molecule moves through both biotic and abiotic compartments of an ecosystem. What is the role of endorphins during continuous exercise Which one of these lines uses iambic pentameter Which example from "Everyday Use" best shows the reader that the narrator is strong and a hard worker? A.It seems to me I have talked to them always with one foot raised in flight. B.I can kill and clean a hog as mercilessly as a man. C.Sometimes I dream a dream in which Dee and I are suddenly brought together. D.My hair glistens in the hot bright lights. While a(n) ____ is the group of individuals actually observed in a research study, the ____ is the group of individuals that researchers want to generalize or extend their findings to describe?