Which of these is a ball and stick model?
C subscript 2 H subscript 4.
2 overlapping large black spheres each with 2 small blue spheres overlapping it.
2 medium sized black spheres connected by 2 grey sticks. Each black sphere has 2 small blue spheres connected to it by 1 grey stick.
2 C's connected by 2 black lines. Each C has 2 H's connected to it each by 1 black line.
Answers
The ball and stick model of C subscript 2 H subscript 4 is described as Option C: Each C has 2 H's connected to it each by 1 black.
This means the same as the 3D structure image of ethylene (C2H4) and means 2 C's connected by 2 black lines.
line.
The structure of ethylene is made up of 2 carbon atoms and 4 hydrogen atoms.
The carbon atoms are located at the middle position and the hydrogen atom surrounding the carbon atoms with two hydrogen atoms connected to each carbon atom. The two black lines connecting the carbons are the double bonds.
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Answer:
C
Explanation:
Related Questions
. Why do we experience night and day? A. The moon blocks out the Sun during the night. B. The moon blocks sunlight from getting to one side of Earth. C.The side of Earth facing the Sun receives the sunlight. D.the side of Earth facing the Sun does not receive sunlight.
Answers
Hello Darling, it's because (C) The side of the Earth facing the Sun receives sunlight.
Hope this help~ ^^
Answer: C
The side facing the Sun receives the sunlight. The side that doesn’t face the sun downs’t recieve sunlight. The side that receives the sunlight experiences day, and the side that doesn’t receive sunlight experiences night.
:)
how many atoms of zinc are required to weigh 5.4 ng
Answers
Answer:
4.97 X 10^13 ATOMS OF Zn
Explanation:
how many atoms of zinc are required to weigh 5.4 ng
a nano gram is 10^-9 grams
Zinc has an atomic mass of 65.39 gm/moles
there is an Avogadros number of atoms in a mole
65.39 GRAMS PER MOLE
65.39 g/(6.022 X 10^23)how many atoms of zinc are required to weigh 5.4 ng
GRAMS PER ATOM
1.086 GRAMS PER 1O^22 ATOMS
1 atom of Zn weighs 1.086 X 10^9 X 1O^-22 n grm=
1,086 X 10^-13 n gm
Y tines 1.086 X 10^-13 = 5.4 n gm
Y = 5.4/ (1.086 X 10^-13) =
4.97 X 10^13 ATOMS OF Zn
CHECK
(4.97 X 10^13 ) X 65.39 gm/(6.022 X 10^23) =
5.397 X 10^-9 =
5.4 n g
Read the etymology entry.
antagonize
antagonize (v.) 1630s, "to compete with" (obsolete); 1742, "act in opposition to, struggle against continuously,"
from Greek antagonizesthai "to struggle against, oppose, be a rival," from anti "against" (see anti-) + agonizesthai
"to contend for a prize," from agon "a struggle, a contest" (see agony). Meaning "make antagonistic" is by 1882.
What original language did the word antagonize come from?
O Greek
O Latin
O Middle French
O Middle English
Answers
Answer:
latin
Explanation:
im not sure sorry if wrong
Answer:
Greek
Explanation:
Mid 17th century (in the sense 'compete with'): from Greek antagōnizesthai, from ant- 'against' + agōnizesthai 'struggle' (see agonize).
Someone please help? I've had a go at this myself (see picture of working attached) but not sure where to go from there?
75ml of a solutipn of 0.1mol l-1 NaOH neutralises 25ml of a solution of an acid. The formula of the acid is HxA and the concentration of the acid is 0.1mol l-1. What is the value of x?
Answers
Answer:
75 ml of 0.1M base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion
but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH
which means the formula for the acid must be H3A and
the value of x in
HxA is 3
Explanation:
75ml of a solutipn of 0.1moL l-1 NaOH neutralises 25ml of a solution of an acid. The formula of the acid is HxA and the concentration of the acid is 0.1mol l-1. What is the value of x?
the concentration of both the and the base are the same at 0.1M
the base...NaOH has 0.1 moles/L of OH ion
75 ml of 0.1M base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion
but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH
which means the formula for the acid must be H3A and the value of x in
HxA is 3
Why are coal, oil and natural gas called fossil fuels
Answers
The reaction is: Fe2O3 (s) + 2Al (s) → 2Fe (l) + Al2O3 (s)
What mass, in grams, of iron (III) oxide reacted to produce 4.5 mol of Al2O3 ???
Answers
Answer:
718.6 gm
Explanation:
The reaction is: Fe2O3 (s) + 2Al (s) → 2Fe (l) + Al2O3 (s)
What mass, in grams, of iron (III) oxide reacted to produce 4.5 mol of Al2O3
1 mole of Fe2Os produces 1 mol of Al2O3
so 4.5 mols Fe2O3 would produce 4.5 mols Al2O3
the molecular mass of Fe2O3 is
(2 X 55.85) + (16 X 3) =
111.7 + 48 =
159.7
4.5 mols Fe2O6 weighs
4.5 X 159.7 =
718.6 gm
check:
718.6 gm of Fe3O2
What happens to the pH of a solution is the concentration of hydronium ions decrease
Answers
What are the causes and consequences of climate change
Answers
Answer: Humans are increasingly influencing the climate and the earth's temperature by burning fossil fuels, cutting down forests and farming livestock.
Explanation: This adds enormous amounts of greenhouse gases to those naturally occurring in the atmosphere, increasing the greenhouse effect and global warming.
ARTICLE:
When Olafur Eliasson and Frederik Ottesen heard that more than 1 billion people on Earth don’t have access to electricity, they wanted to help. In many places, lack of electricity means students can’t study after dark and families can’t cook after the sun goes down. It’s also harder for doctors and nurses to treat patients without good lighting. Eliasson and Ottesen decided to invent a solar lamp that would provide light without costing a lot of money, polluting the air, or causing fires.
Their solution? The Little Sun lamp is a sun-shaped light with a light bulb on one side and a solar panel on the other. The Little Sun lamp uses energy to provide light to people who need it, but the Little Sun doesn’t make its own energy. To run, the lamp needs to get energy from somewhere else. In this case, that source of energy is the sun. The solar panel on the back of the lamp converts light energy from the sun into potential energy that can be stored in a battery and used later to make the light bulb shine. Little Sun lamps charge in the sun during the day and provide light at night, allowing people to study, cook, work, and take care of other things even after the sun sets. They’re inexpensive, don’t pollute, and don’t cause fires.
questions: 2) How does the Little Sun Lamp help people around the world get light?
3) How does the Little Sun Lamp use energy from the sun to make the light bulb shine?
Answers
Answer:
got light to charge from the sun
Explanation:
they did it so that people don't pollute the ozone layer and thats why they invent that and it help them in every way
The electron configuration of an element is shown below.
1s22s22p63s23p6
Name the group this element belongs to in the periodic table and explain your answer.
Based on the electron configuration, write one chemical property of this element.
Answers
The element belongs to group 18 and the element is chemically inert.
What is electron configuration?The term electron configuration refers to the arrangement of electrons in an atom. The electron configuration of an atom can show the group to which it belongs in the periodic table.
Given the configuration, 1s22s22p63s23p6 the element belongs to group 18 and the element is chemically inert.
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An element with 3 valence electrons would be a
0-3 anion
0 + 3 anion
+3 cation
0 - 3 cation
Answers
Answer:
0+3 anion
Explanation:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
Which of the following corresponds to an alpha particle?
A. 1/4He
B. 3/2He
C. 2/2H
D. 4/2He
Answers
Answer:
D. 4/2 He corresponds to an alpha particle.
what are the products of the reaction: Be(s)+ Cl2(g)⟶
Answers
Answer:
BeCl2
Explanation:
Be+Cl2=BeCl2
which of the following substances will cross the cell membrance through osomosis
Answers
Answer:Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ).
Explanation:
Which object represents a heterogeneous
mixture
Answers
Answer:
oil and water
Explanation:
oil and water - When you put oil and water together they do not mix. Therefore, these are a heterogeneous mixture since they are two separate parts.
What type of energy is best described as the energy required to break the bonds present in the reactants?
A
activation energy
B
potential energy
С
kinetic energy
D
thermal energy
hay
Answers
Answer:
b
Explanation:
Haty
The energy required to break the bond in the reactants is activation energy .
Hence, option (A) is correct answer.
What is Exothermic Reaction ?The chemical reaction which releases energy are known as exothermic reaction. Bond forming is exothermic process. Activation energy is needed to initiate the reaction. In exothermic reaction potential energy converted into kinetic energy.
What is Endothermic Reaction ?The chemical reaction which absorbs heat from the surrounding is known as endothermic reaction. Bond breaking is endothermic reaction. Activation energy is needed to initiate the reaction. In endothermic reaction kinetic energy converted into potential energy.
Thus, from the above conclusion we can say that The energy required to break the bond in the reactants is activation energy .
Hence, option (A) is correct answer.
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What happened a when you try to layer a more-dense solution on top of a less-dense solution
Answers
Answer:
the more dense solution will sink to the bottom the less dense solution will go to the top
Answer:
Explanation:The density of a liquid determines whether it will float on or sink in another liquid. A liquid will float if it is less dense than the liquid it is placed in. A liquid will sink if it is more dense than the liquid it is placed in.
Density of a liquid determines how it will layer (heaviest to lightest). If the liquid us least dense it float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.
1. Assume samples that emit radiation are placed on a table across the room. Which sample will produce the greatest damage to you? Alpha emitter Beta emitter? Gamma emitter? WHY?
Answers
A question like this is quite nuanced, so let’s dive in.
Radiation that is made of charged particles (like alpha and beta) behave differently than radiation that is made up of neutral particles (like gamma). Charged particles are characterized by their “range”, which describes how far that particle can go through a medium (like air) before they lose their kinetic energy and become harmless. Alpha particles are relatively heavy and have a range of 1-10 cm in air at atmospheric pressure, so a sample that is an alpha emitter placed on the opposite side of the room will have exactly zero potential of dealing damage to you. You’re simply too far away. For a beta emitter, the range of beta particles is about 4 meters per MeV (a measure of the particle’s energy). This means that a low energy beta can reach you from across the room, and higher energy betas can easily reach you.
Neutral particles are not characterized by ranges, as they interact with matter differently. Instead, they are characterized by “half-thicknesses” based on an exponential attenuation function. The half-thickness of a material is the thickness of the material needed to reduce the intensity of the gamma rays to one-half the original intensity. Because of this, a gamma emitting sample will easily be able to affect you just like a beta sample would be. We now have to use something else to determine which will be worse.
In radiative studies, there exists a parameter for radiation types called the “quality factor”, which adjusts the value for radiation doses to account for the biological impact of each type of radiation. For example, if you were exposed to two different types of radiation with the exact same dose but one had a quality factor of one and the other had a QF of ten, then the radiation with a QF of ten did essentially ten times more damage than the other. Gamma rays have a quality factor of 1, whereas beta rays can have a QF anywhere from 1-20 based on their energy (higher energy = higher QF). Because of this, the beta emitter will likely do more damage than the gamma emitter.
Hope this helps!
The damage caused by the radiations has been maximum for the gamma radiations.
What are charged radiations?The charged radiations are comprised of the molecules that have been comprised of the charged particles. The charged particles have been alpha, beta or gamma radiation.
The damage that has been caused by the radiation has been found with the intensity of the quality factor and the thickness of the molecule that comprises the amount of damage formed.
The maximum quality factor has been for the gamma radiation. Thus, gamma radiations form the basis for the maximum damage.
Learn more about gamma radiations, here:
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How many moles of the excess reagent would there be if 2.8mol of N2 were reacted with 15.1mol of H2O?
N2+4H2O ---> 2H2O2+N2H4
Answers
The number of moles of the excess reagent there would be is 3.9 moles
From the question,
We are to determine the number of moles of the excess reagent there would be.
The given balanced chemical equation is
N₂ + 4H₂O → 2H₂O₂ + N₂H₄
This means,
1 mole of N₂ is required to react completely with 4 moles of H₂O
Now,
If 1 mole of N₂ is required to react completely with 4 moles of H₂O
Then,
2.8 moles of N₂ will react completely with 11.2 moles of H₂O
∴ H₂O is the excess reagent
Number of moles of H₂O that would remain = 15.1 mol - 11.2 mol
Number of moles of H₂O that would remain = 3.9 mol
Hence, the number of moles of the excess reagent there would be is 3.9 moles
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Write the equation that represents what happens when barium hydroxide dissolves in water. You do not need to include water as a reactant in the equation.
Answers
Barium hydroxide dissolves in water according to the equation: [tex]Ba (OH)_2 (aq) ---> Ba^2^+(aq) + 2OH^-(aq)[/tex]
When barium hydroxide is dissolved in water, it dissociates into its component ions completely. In other words, barium hydroxide dissociates into barium and hydroxyl ions just like every other strong base.
The equation for the dissociation in water is as follows:
[tex]Ba (OH)_2 (aq) ---> Ba^2^+(aq) + 2OH^-(aq)[/tex]
More on barium hydroxide can be found here: https://brainly.com/question/10094403
Answer:
Ba(OH)2 (s) --> Ba2+ (aq) + 2OH- (aq)
Explanation:
Barium hydroxide is a solid before it dissolves in water, and then becomes an aqueous solution during the reaction.
Aanlyze the potential energy diagram of the
reaction shown.
Which statements about the reaction are true?
Select all that apply.
The reaction is exothermic
The reaction is endothermic
The equation shows that 891 kJ of energy are
released as a product.
The equation shows that 891 kJ of energy are
absorbed as a reactant.
The graph shows that the reactants have greater potential energy than the products.
The answer is a,c,e
Answers
Answer:
A: The reaction is exothermic
C: The equation shows that 891 kJ of energy are released as a product.
E: The graph shows that the reactants have greater potential energy than the products.
Explanation:
The statement about the reaction is true:
A: The reaction is exothermic
C: The equation shows that 891 kJ of energy is released as a product.
E: The graph shows that the reactants have greater potential energy than the products.
What is potential energy?Potential energy is the energy that is saved in the body. It is used in the work and when convert into kinetic energy.
A moving item fundamentally possesses kinetic energy. Kinetic energy would therefore be created as a result of an object moving or an elastic band being released since the released object exhibits motion.
Therefore, the correct option is A: The reaction is exothermic, C: The equation shows that 891 kJ of energy is released as a product, and E: The graph shows that the reactants have greater potential energy than the products.
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A unit for measuring work is called the _____.
horsepower
effort
time
foot-pound
Answers
Answer:
A unit for measuring work is called the foot-pound
The small flag indicating wind direction on a station weather plot points in the direction that the wind is going.
True or False
Answers
Answer:
False
Explanation: The wind's direction is shown by a long shaft. it will point to the direction from which direction the wind is blowing.
You are given a water-soluble compound X. Describe how you would determine whether it is an electrolyte or a nonelectrolyte. If it is an electrolyte, how would you determine whether it is strong or weak?
Answers
If the compound contains a metal cation or an ammonium cation, then the compound is ionic. Otherwise it is a molecular compound. Ionic compounds that dissociate completely in water are strong electrolytes. ... Molecular compounds that are weak acids are weak electrolytes.
CORRECT ME IF IM WRONG
HOPE IT HELPS:(
An electrolyte substances which, when dissolved in aqueous solution, dissociates into cations (+ ions) and anions (- ions).
Electrolytes can either be a weak or strong electrolyte depending on whether they can dissociate partially or completely.
Therefore, regarding the water-soluble compound X:
it is an electrolyte if it dissociates into its respective ions in an aqueous solutionThe compound is a weak or strong electrolyte depending on whether it dissociates partially or completely.Learn more about electrolytes at: https://brainly.com/question/14566383
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Pls answer.............
Answers
Answer:
Ductile
Explanation:
The metal is ductile, and that is why it can be stretched into wires.
how do you separate the following mixture? Name only the process involved .
1.Sand and salt
Answers
Answer:
Just dissolve in water , you can separate
Explanation:
because salt dissolves in water but sand doesn't
Explanation:
sedinentation and decantation
A balloon contains 0.76 mol O2, 0.18 mol Ne, 0.031 mol Xe and 0.026 mol CO2 at 749 mm Hg. What is the partial pressure of Ne
Answers
Answer:
ans given below
Explanation:
To keep simplicity, let's assume these gases behave ideally so we can use the equations for ideal gas. One of these equation is the Raoult's Law written below.
P* = xP
This is another form of the Raoult's Law where x is the mole fraction. Let's find x for O2.
x = 0.18/(0.76+0.18+0.031+0.026) = 0.1805
Partial Pressure = (0.1805)(749 mmHg) = 135.23 mmHg
Make a neutral Beryllium atom by adding protons, neutrons and electrons. Now, what would you do to make a
beryllium atom with a negativecharge?
Answers
Answer:
4 protons, 5 neutrons, 4 electrons to have the neutral Be atom
the only way to make a negative Be is to have more than 4 electrons
Explanation:
Make a neutral Beryllium atom by adding protons, neutrons and electrons. Now, what would you do to make a
beryllium atom with a negative charge?
Be has an atomic number of 4, an atomic mass 9
its atomic number tells us it has 4 protons, with a +4 charge
its atomic mass = neutrons + protons, so it has 5 neutrons with no charge
its neutral atom will have 4 electrons each with a negative charge to balance the +4 total proton harge.
so
4 protons, 5 neutrons, 4 electrons to have the neutral Be atom
to make a negative Be species, it still must have an atomic number of 4,
or it is not Beryllium
so the only way to make a negative Be is to have more than 4 electrons
Compuesto organico que no existe como alqueno ni alquino?
Answers
Answer:
Susssssssssssssssy
Explanation:
Sup
can someone please help me i need this done rn
