Answer:
Size of cation is lower than neutral atom because as a particular atom looses electron, no of proton become more than no of electron and attraction forces increases so radius decreases.
Which equation correctly represents the dissociation of a strong acid in water?
Question 26 options:
CH3COOH ↔H++ CH3COO−
NaOH →Na++OH−
HCl →H+ +Cl−
NH3+ H2O↔ NH4++ OH−
The equation that correctly represents the dissociation of a strong acid in water is as follows: HCl → H+ + Cl−
What is acid dissociation?Acid dissociation is the process by which an acid breaks up into it's constituent ions in an aqueous solution.
Acids are known to contain hydrogen ions (H+), hence, dissociate into H+ and an anion.
A strong acid like HCl dissociates completely in an aqueous solution while a weak acid does not dissociate completely.
According to this question, hydrogen chloride (HCl) is said to dissociate into hydrogen ion (H+) and chloride (Cl-) according to the following expression:
HCl → H+ + Cl−
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Which two geographic features form as a result of continental-continetal convergent
plates?
Answer:
Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries. Volcanoes are one kind of feature that forms along convergent plate boundaries, where two tectonic plates collide and one moves beneath the other.
Explanation:
I hope it's help u
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Which component of a river system is made of streams and small rivers that feed into a large river? Which component of a river system is also called a drainage basin? Which component of a river system is a ridge between water flowing in two directions?
Explanation: A river drainage basin is an area drained by a river and all of its tributaries. A river basin is made up of many different watersheds. A watershed is a small version of a river basin. Every stream and tributary has its own watershed, which drains to a larger stream or wetland.
The component of a river system is made of stream and small rivers that feed into a large river is tributaries. The component of a river system also called a drainage system is watersheds. The component of a river system is a ridge between water flowing in two directions is divided.
What are tributaries and watersheds?
Tributaries are the small rivers or streams that are made from the big or main river.
Watershed is the place where the rainwater from all river lines come to a point.
Thus, the correct options are tributaries, watersheds, and divided.
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Balance this equation
Fe2O2 + C -> Fe + CO2
2 FeO + 1 C ===》2 Fe + 1 CO2
Explanation:
Fe2O2+C-----> 2Fe+CO2
balanced equation..
hope it helps.
stay safe healthy and happy.......Sodium chloride is produced from its elements through a synthesis reaction. What mass of each reactant would be required to produce 22.0 mol of sodium chloride? sodium
Answer:
506.0 g sodium and 778.8 g chlorine gas
Explanation:
The elements from which sodium chloride (NaCl) is composed are sodium (Na) and chlorine (Cl). Thus, the chemical equation for the production of sodium chloride (NaCl) from sodium (Na) and chlorine gas (Cl₂) is the following:
2Na(s) + Cl₂(g) → 2NaCl(s)
According to the balanced equation, 2 moles of NaCl are produced from 2 moles of Na(s) and 1 mol of Cl₂. To produce 22.0 mol of NaCl, we need:
22.0 mol NaCl x 2 mol Na(s)/2 mol NaCl = 22.0 mol Na(s)
22.0 mol NaCl x 1 mol Cl₂/2 mol NaCl = 11.0 mol Cl₂
Now, we convert the moles of each reactant to grams with the molar mass (MM) of the compound:
MM(Na) = 23 g/mol
22.0 mol Na x 23 g/mol = 506.0 g Na(s)
MM(Cl₂) = 35.4 g/mol x 2 = 70.8 g/mol
11.0 mol Cl₂ x 70.8 g/mol = 778.8 g Cl₂
Therefore, it is required a mass of 506.0 grams of Na(s) and a mass of 778.8 grams of Cl₂ to produce 22.0 mol of NaCl.
Can u please help me
Answer:
they are all true
Explanation:
HI! I REALLY NEED HELP WITH THIS, THANK YOU!
ig The right answer is -Give the reaction more time.
Which planet would make the closest approach to Earth as the planet orbits the sun?
Planet
Distance from the Sun in AU
Mercury
0.387
Venus
0.723
Earth
1
Mars
1.52
Jupiter
5.20
Saturn
9.54
Uranus
19.2
Neptune
30.1
A. Mercury
B. Jupiter
C. Venus
D. Mars
Answer:
D
Explanation:
Mars is nearest to Earth
Among the given planets, Mercury would make the closest approach to Earth as it orbits the Sun. This is because Mercury has the smallest average distance from the Sun, with a value of 0.387 astronomical units (AU).
The distances of the planets from the Sun are measured in astronomical units, where 1 AU is the average distance between the Earth and the Sun. With a distance of 0.387 AU, Mercury's orbit is closer to the Sun compared to the other planets listed.
As Mercury orbits the Sun, its path occasionally brings it closer to Earth when both planets align in their respective orbits. This phenomenon is known as a close approach or inferior conjunction. During this alignment, Mercury appears closer to Earth in the night sky, making it the planet that would make the closest approach to Earth among the given options.
Hence, the correct option is option A.
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If a piece of pure gold jewelers weighs 11.81 grams, how many atoms is it made of?
Answer:30.573 Billion atoms are in one gram
Explanation:
Does the excess reactant get used up completely in a reaction??
Answer:
In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed.
Explanation:
Since we know that _______________, we can conclude that the gas produced when mixing bath bombs in water could not be baking soda, citric acid, or water.
Answer:
Sodium bicarbonate.
Explanation:
The gas produced during the mixing of bath bombs in water is Sodium bicarbonate. If the reaction is with citric acid then Sodium citrate can be produced. They are weak acid with bicarbonate base. These bath bombs can be a mixture of wet and dry substances and any shape can be mold.
Can someone help me please? I’d appreciate it! Also please do not send me a link or delete your answer! Thanks
The piston of an internal combustion engine
compresses 218 mL of gas. The final pressure
is 15 times greater than the initial pressure.
What is the final volume of the gas, assuming
constant temperature?
Answer in units of mL.
Answer:
14.53ML
Explanation:
V1=218
V2=?
P2=15p1
USING BOYLE'S LAW
P1V1=P2V2
V2=P1V1/P2=P1(218ML)/15P1
=14.53ML
How many electrons did chlorine gain to become an atom with -1 charge ?
Answer:
17 electrons. On the right, the chloride ion has 18 electrons and has a 1− charge.
Explanation:
Which of the following is a correct statement about water? (3 points)
Hydrogen bonding causes water to be strongly cohesive.
Hydrogen bonding causes water to have a low surface tension.
Water is a universal solvent because polar and nonpolar solutes can dissolve in it.
Water is less dense as a liquid than as a solid because of changes in bond structure.
Answer:
A: Hydrogen bonding causes water to be strongly cohesive.
Explanation:
Water has a high surafce tension. Hence droplets of water
Water cannot dissolve non polar substances like oil; only polar
Water is actually less dense in solid form :)
Hydrogen bonding causes water to be strongly cohesive.
This sticking together of like substances is called cohesion. Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other. Therefore, water is very cohesive.
Cohesion
Cohesion, also called cohesive attraction or cohesive force, is the action or property of like molecules sticking together, being mutually attractive. It is an intrinsic property of a substance that is caused by the shape and structure of its molecules, which makes the distribution of surrounding electrons irregular when molecules get close to one another, creating an electrical attraction that can maintain a microscopic structure such as a water drop. In other words, cohesion allows for surface tension, creating a "solid-like" state upon which light-weight or low-density materials can be placed.
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PLZ HELP... provide the correct coefficients to balance the chemical equation C2H6+O2 -> CO2 + H20
Find the molecular weight of CO
Answer:
The molecular weight of CO is 28.01g/mole.
HELP ME PLEASE
IM LITERALLY FAILING
Which of the following is not a component of cell theory?
a. Cells can be generated by element condensation in water vapor.
b. All organisms are made of one or more cells.
c. Cells are basic building blocks of all life.
d. Cells must come from pre-existing cells.
Answer:
A
Explanation:
Definitely not in the cell theory
Base your answer on the information below. The radioisotope uranium-238 occurs naturally in Earth's crust. The disintegration of this radioisotope is the first in a series of spontaneous decays. The sixth decay in this series produces the radioisotope radon-222. The decay of radon-222 produces the radioisotope polonium-218 that has a half- life of 3.04 minutes. Eventually, the stable isotope lead-206 is produced by the alpha decay of an unstable nuclide. Determine the original mass of a sample of Po-218, if 1.50 milligram of the sample remains unchanged after 9.12 minutes
Answer:
12 mmilligrams of Po-218 was the mass of the original starting material
Explanation:
The half-life of a radioactive material is the time taken for half the amount ofnthe original material present in a radioactive material to decay or disintegrate.
After each half-life, half the original material present at the start remains.
For the radioactive polonium-218 having a half-life of 3.04 minutes, it means that if 1 g is the starting material, after 3.04 minutes, 1/2 g will be remaining; after, 6.08 minutes 1/2 of 1/2 which is 1/4 of the starting material will be remaining; and after 9.12 minutes, 1/2 of 1/4 = 1/8 g will be remaining.
From the question, number of half-lives undergone after 9.12 minutes = 9.12/3.04 = 3 half-lives.
After 3 half-lives, 1/8 of the original material is remaining.
1/8 = 1.50 mg
The original mass of the sample at the start = 1.50 mg × 8 = 12 mg
Therefore, 12 milligrams of Po-218 was the mass of the original starting material.
Tritium (hydrogen-3) has a half-life of 12.3 years. How old is a bottle of wine if the tritium content is determined to be 25% in new bottle of wine
Answer:
24.6 years
Explanation:
Applying,
A = (A')[tex]2^{a/n}[/tex]..................... Equation 1
Where A = Original Tritium content in the wine, A' = Tritium content in the wine after decay, a = age of the old bottle, n = half life of Tritium
From the question,
Let A = X, therefore, A' = 0.25X
Given: n = 12.3 years
Substitute these values into equation 1
X = 0.25X([tex]2^{a/n}[/tex])
1 = 0.25×([tex]2^{a/12.3}[/tex])
1/0.25 =
4 = [tex]2^{a/12.3}[/tex]
[tex]2^{a/12.3}[/tex] = 2²
Equation the base,
a/12.3 = 2
a = 12.3×2
a = 24.6 years
2Al + 6HCl --> 2AlCl3 + 3H2 Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP? ( 8.8 g )
Answer:
8.8g of Al are necessaries
Explanation:
Based on the reaction, 2 moles of Al are required to produce 3 moles of hydrogen gas.
To solve this question we must find the moles of H2 in 11L at STP using PV = nRT. With these moles we can find the moles of Al required and its mass as follows:
Moles H2:
PV = nRT; PV/RT = n
Where P is pressure = 1atm at STP; V is volume = 11L; R is gas constant = 0.082atmL/molK and T is absolute temperature = 273.15K at STP
Replacing:
1atm*11L/0.082atmL/molK*273.15K = n
n = 0.491 moles of H2 must be produced
Moles Al:
0.491 moles of H2 * (2mol Al / 3mol H2) = 0.327moles of Al are required
Mass Al -Molar mass: 26.98g/mol-:
0.327moles of Al * (26.98g / mol) = 8.8g of Al are necessaries
cultura de Australia ?
La cultura de Australia es una cultura occidental derivada principalmente de Gran Bretaña, pero también influenciada por la geografía única del continente australiano, la diversa aportación de aborígenes, isleños del Estrecho de Torres y otros pueblos de Oceanía. ... Los australianos son generalmente relajados, abiertos y directos.
5 moles of oxygen gas is equal to how many grams?
Answer:
160 g
Explanation:
1 mole of oxygen atom = 16 g
Number of moles of oxygen given = 5 mole
Molecular weight of oxygen molecule = 32 g/ mole
Weight of oxygen in gram = 5 mol x 32 g/mol= 160 g
Therefore, 160 g of oxygen is present in 5 moles.
What is the mass number of a atom with 10 protons and 13 neutrons
What is the hottest place on the planet?
Answer:
Death Valley in California U.S. is the hottest place in the world
A chloride ion, : Cl :i– , acts as a alternate base when it combines with
A. a OH– ion
B. a K+ ion
C. an H– ion
D. an H+ ion
Answer:
D
Explanation:
The answer is D...and if you need explanation you can comment
Why does air density decrease with increasing altitude within Earth's atmosphere?
Explanation:
As the altitude increases, the pressure and the density of the atmosphere decrease.
Study the particle below carefully and answer
the questions that followed.
a)ldentify the particle.
b)Write the electronic configuration of the
particle.
c)State
i.Atomic number
ii.Mass number
iii.Proton number
iv.Electron number
d) Calculate the neutron number
e) State the valency
f)What is the valence electrons?
Answer:
b is the answer hope that helps
0.444 mol C2H5OH= how many molecules
Explanation:
hope it make sense to u :)
What are five different types of air pollutant each
my chem test is tomorrow!! please help
Answer:
The pH of the pure water is not always neutral but actually sometimes it can be slightly acidic but not of the same extent or value as HCl obviously. However ,it is enough to result to a color change in the presence of phenolphthalein.
Explanation:
I will try to be brief and spare the boring details .Basically ,this is caused by the reaction of water and CO2 that is naturally present in the atmosphere to produce a weak acid known as carbonic acid.
~Hope this helps:)