Answers
Answer:
i will help you
Explanation:
if the reactions have more energy than the products this means that there is some energy that given outside and this reaction will called an exothermic reaction.
But if the reaction have less energy than the products this means that there is some energy that taken from outside and this reaction is called an endothermic reaction.
Related Questions
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.
what i compound is
FeI2
Answers
Answer:
iodide
Explanation:
Answer:
Iron(II) iodide
Explanation:
Why are coal, oil and natural gas called fossil fuels
Answers
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).
what is the functional group and homologous series of ethyl butyrate?
Answers
Answer:
Functional group: ROR'
Homologous series: ester [C6H12O2]
Mark brainliest please
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
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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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
The molarity of an aqueous solution of CaCl is defined as the
Answers
Answer:
Molarity of aqueous solution of CaCl2 can be defined as moles of CaCl2 per litre of solution
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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Compuesto organico que no existe como alqueno ni alquino?
Answers
Answer:
Susssssssssssssssy
Explanation:
Sup
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
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
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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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.
Can you force the atoms into new configurations by pushing atoms around? What does this suggest
about the configuration of atoms in real molecules?
What is the difference between Electron Geometry and Molecule Geometry?
In one or two grammatically correct sentences, write a definition for the term Molecule Geometry.
Answers
Answer:
Yes
Explanation:
By forcing the atoms into a new configuration is possible.
The addition of new atoms around the atom will change the electronic geometry of the atoms. The addition of electron-accepting or donating atoms will result in a change in configuration. The configuration change will result in the change in the hybridization of the atom, and it will acquire a new shape. The geometry of the molecule changes and it will acquire the lowest energy state.
This suggests that atoms in real molecules are present in the flexible state of configuration, and are at least energy, The change in the surrounding changes the configuration of the atoms, and are easily configured.
element Q,X, and Z are in the same group on the periodic table and are listed in order of increasing atomic number.The melting point of element Q is -219 Celsius and the melting point of element Z is -7 celsius. Which temperature is closest to the melting point of element X
Answers
Answer:
Very low ionization energy: metal bonds easily: group 1, or maybe 2 low melting.
Explanation:
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.
Convert 1.53 x 10^24 atoms of carbon to moles of carbon.
1.53 x 10^24 atoms = ________ mol C
Answers
Well one mole of carbon specifies 6.022×10²⁴
INDIVIDUAL carbon atoms, i.e. a mole of carbon.........
Explanation:
And thus we take the quotient.......
[tex] \frac{1.35 \times {10}^{24} ·C·atoms}{6.022 \times {10}^{24} \times C \times atoms } = 2.24 \: mol \\ [/tex]
- BRAINLIEST ANSWERER
Answer:
Use dimensional analysis:
1.27x1024 atoms C x 1 mol C/6.02x1023 atoms = 2.11 mol C
Explanation:
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.
what are the products of the reaction: Be(s)+ Cl2(g)⟶
Answers
Answer:
BeCl2
Explanation:
Be+Cl2=BeCl2
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
What happens to the pH of a solution is the concentration of hydronium ions decrease
Answers
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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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.
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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
Pls answer.............
Answers
Answer:
Ductile
Explanation:
The metal is ductile, and that is why it can be stretched into wires.
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.
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:
can someone please help me i need this done rn
