Answers
Answer:
An exothermic reaction
✔ produces energy
.
In an endothermic reaction, the energy of the products is
✔ more than
the energy of the reactants.
Activation energy is
✔ always greater than
the potential energy of the products
Answer:
Produces energy
More than
Always greater than
Explanation:
Related Questions
An unknown compound has the following chemical formula: NO_x
where x stands for a whole number.
Measurements also show that a certain sample of the unknown compound contains of oxygen and of nitrogen.
Write the complete chemical formula for the unknown compound.
Answers
Answer:
NO_x
Explanation:
you said it
The periodic table of elements is composed of many
Answers
Answer:
The periodic table is composed of many elements.
Explanation:
1. it's in the name.
2. if you search up what is the periodic table made of (Not that I did) it will say elements.
Brainliest if you liked the answer please.
Convert 1.2 Mg into milligrams
Answers
Answer:
1200 milligrams
Let us assume that Cr(OH)3 (s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion Cr3+ (aq) + 3NaOH(aq) + Cu(OH)3 (s) + 3Na+ (aq) If you had a 0.150 L solution containing 0.0280 M of Cr3' (aq), and you wished to add enough 1.31 M NaOH(aq) to precipitate all of the metal, what is the minimum amount of the NaOH(aq) solution you would need to add? Assume that the NaOH(aq) solution is the only source of OH(aq) for the precipitation Express the volume to three significant figures and include the appropriate units.
Answers
Answer:
Formation of an insoluble compound will sometimes occur when a solution containing a particular cation (a positively charged ion) is mixed with another solution containing a particular anion (a negatively charged ion). The solid that separates is called a precipitate.
Explanation:
is mixing acid and base a chemical change or a physical change
Answers
Answer : chemical reaction
Mixing an acid with a base is a common chemical reaction.
Answer:
It is a chemical reaction.
Explanation:
Mixing acid and base is a common chemical reaction.
(I had my answer in the comments bc at the time I couldn't submit it as a answer so here ya go)
Hope this helps! :)
You have 150.0 mL of a 0.415 M solution of Ce(NO₃)₄.
a) What mass (in grams) of Ce(NO₃)₄ would be required to make the solution?
B) What is the concentration of the nitrate ions in the solution ?
C) If the original solution was diluted to 350.0 mL, what would be the new concentration of the Ce(NO₃)₄ in the solution?
Answers
A. The mass (in grams) of Ce(NO₃)₄ that will be required to make the solution is 24.16 g
B. The concentration of the nitrate ions in the solution is 1.66 M
C. The new concentration of the Ce(NO₃)₄ solution is 0.178 M
We'll begin by calculating the number of mole of Ce(NO₃)₄ in the solution.
Molarity = 0.415 M
Volume = 150 mL = 150 /1000 = 0.15 L
Mole of Ce(NO₃)₄ =?Mole = Molarity × Volume
Mole of Ce(NO₃)₄ = 0.415 × 0.15
Mole of Ce(NO₃)₄ = 0.06225 moleA. Determination of the mass of Ce(NO₃)₄ required to make the solution.
Mole of Ce(NO₃)₄ = 0.06225 mole
Molar of Ce(NO₃)₄ = 140.12 + 4[14 + (16×3)]
= 140.12 + 4[14 + 48]
= 140.12 + 4[62]
= 140.12 + 248
= 388.12 g/mol
Mass of Ce(NO₃)₄ =?Mass = mole × molar mass
Mass of Ce(NO₃)₄ = 0.06225 × 388.12
Mass of Ce(NO₃)₄ = 24.16 gTherefore, 24.16 g of Ce(NO₃)₄ is required to make the solution.
B. Determination of the concentration of the nitrate ion, NO₃¯ in the solution.
In solution, Ce(NO₃)₄ will dissociate as follow:
Ce(NO₃)₄ (aq) —> Ce⁴⁺(aq) + 4NO₃¯(aq)
From the balanced equation above,
1 mole of Ce(NO₃)₄ contains 4 moles of NO₃¯
Therefore,
0.415 M solution of Ce(NO₃)₄ will contain = 0.415 × 4 = 1.66 M NO₃¯
Thus, 1.66 M of the nitrate ion, NO₃¯, is present in the solution.
C. Determination of the new concentration of the Ce(NO₃)₄ solution.
Volume of stock solution (V₁) = 150 mL
Molarity of stock solution (M₁) = 0.415 M
Volume of diluted solution (V₂) = 350 mL
Molarity of diluted solution (M₂) =?
M₁V₁ = M₂V₂0.415 × 150 = M₂ × 350
62.25 = M₂ × 350
Divide both side by 350
M₂ = 62.25 / 350
M₂ = 0.178 MTherefore, the new concentration of the Ce(NO₃)₄ solution is 0.178 M
Learn more: https://brainly.com/question/24848714
The following reaction represented oxidation of organic matter (CH2O) using nitrate ions.
If G° = -118.7Kj/mol at 25°C, calculate E°CELL and the equilibrium constant for this
reaction:
14 CH20 + 1/5 NO3 +1/5 H
= CO2 + 1/10 N2 +7/20 H2O
[5]
Answers
sorry but i don't know again sorry!
Which of the following steps is important to critical thinking?
implementing solutions
b utilizing facts
c. holding firm to conclusions
d answering questions
Please select the best answer from the choices provided
Answers
Answer:
b
Explanation:
edge 2022
How long does it take for a car driving at 10m/s to move 200m?
A.
0.05 seconds
B.
2 seconds
C.
20 seconds
D.
2000 seconds
Answers
Explain:
10=1
200=?
200/10=20
The time taken by the car driving at 10m/s to move 200m is 20 seconds. The speed of car is 10m/s. Thus option C is correct.
What is speed?Speed is defined as a measurement of the length of time it takes for an object to travel a certain distance.
The SI unit of speed is m/s, and speed is defined as the ratio of distance to time.
A change in speed is an example of acceleration because it is a change in velocity. Acceleration could be for positive or negative. Deceleration is another name for negative acceleration.
There are four types of speed.
Uniform speedVariable speedAverage speedInstantaneous speedSpeed can be expressed as
Speed = Distance / Time
Given, Distance = 200 m
Time = 10 m/s
Speed = 200m / 10m/s
= 20 seconds
Thus, the time taken by the car driving at 10m/s to move 200m is 20 seconds. The speed of car is 10m/s. Thus option C is correct.
To learn more about speed, refer to the link below:
https://brainly.com/question/28224010
#SPJ2
Can a stable compound be made from these two atoms? Explain why or why not.
Answers
The given oxygen and lithium atoms are unable to form a stable compound.
The given atoms to form a stable compound has been oxygen and lithium.
A stable compound has been formed when the transfer of atom has been resulted in the completion of the valence shell of both the electrons.
The oxygen has 6 valence electrons and require to gain 2 electrons to form the stable compound. The Lithium has 3 electrons and has been able to lose 1 electron to form a stable compound.
Since, the formation of stable compound between oxygen and lithium requires transfer of 2 electrons, and there has been availability of 1 electron from Li. Thus, the atoms are unable to form a stable compound.
For more information about stable compounds, refer to the link:
https://brainly.com/question/8322384
A scientist observed the number of deer that came to drink at a local pond on five different days. The table above shows the data that she collected on those days.
Which of the following is supported by evidence seen in the data?
A.
The most important observations were made on May 1.
B.
More deer came to drink on days that were warmer.
C.
Observations from summer and fall months would have been more useful.
D.
More deer came to drink on days that were cooler.
Answers
Answer:
B.
More deer came to drink on days that were warmer.
Which statement is an example of a scientific hypothesis?
A.
What type of fertilizer is best for growing beans?
B.
Only half of the bean plants grew over six inches.
C.
How long is the life cycle of a bean plant?
D.
Bean plants will grow best in well-drained soil.
Answers
Answer:
D
Explanation:
the HCO3 -1 ion is called
Answers
Answer:
Isn't that the bicarbonate Ion?
when an electron moves from a higher orbit to a lower one does it always follow the same path explained
Answers
Yes, electron follows the same path when it absorb and loses energy.
Yes, when an electron moves from a higher orbit to a lower orbit it always follow the same path as it moves from a lower orbit to a higher orbit. When electron absorb energy it has the power to move from lower orbit to higher orbit or energy level.
While on the other hand, when an electron loses that energy, it comes back to its original position from which it moves earlier when it absorb energy so we conclude that electron follows the same path when it absorb and loses energy.
Learn more: https://brainly.com/question/24962163
How many grams are there in 7.4x10^23 atoms of AL
Answers
Answer:
24 grams of FeF3
Explanation:
help me please :(
D & 1 is also a option
Answers
_________ is when humans choose the traits of an organism.
Answers
Your answer should be -selective breeding
[tex]hope that helps[/tex]
11. A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the
mass of the loaded cart is 3,500g and the height of the seat top is 0.45 meters, then what is the potential energy of the
loaded cart at the height of the seat-top?
Answers
Answer:
15.75 J
Explanation:
Potential energy
= mgh
= 3,500 g × 10 m/s² × 0.45 meters
= 3.5 kg × 4.5 m²/s²
= 15.75 J
Which stament describes a Newton
Answers
Answer:
It reflects the amount of force an object exerts. It states that every object attracts another object.
MARKING BRAINLIEST!
Which factor most directly affects potential energy but not kinetic energy?
Mass
Density
Velocity
Elasticity
Answers
Answer:
Velocity is the answer I hope it helps
Explanation:
Answer:
velocity
Explanation:
3. What is the picture displayed? *
1 point
a.atom
b.molecule
c.element
d.compound
Answers
molecule (hope this helps :))
Scientists believe the Earth's inner core to be solid. This is probably due to extremes in:
pressure
depth
density
temperature
Previous
Answers
Anything that is put under a large amount of pressure becomes compact because it is squished together
what would happen if you added silver nitrate to a solution of sodium chloride?
Answers
Answer:
When silver nitrate solution is added to sodium chloride solution, then a white precipitate of silver chloride is formed along with a sodium nitrate solution.
Explanation:
when silver nitrate solution is added to sodium chloride solution, a white precipitate of silver chloride is formed along with sodium nitrate solution.
AgNO3 + NaCl ----- AgCl + NaNO3
AgCl is white precipitate.
double displacement reaction
Which is a strong base?
A. HCl
B. NaOH
C. NH3
D. H3CO3
Answers
Answer:
c
Explanation:
Answer:
B
Explanation:
Light-DEPENDENT reactions do NOT involve which of the following?
A. sunlight
B. chlorophyll
C. water
D. carbon dioxide
Answers
Answer:
The answer to your question is D. carbon dioxide
Explanation:
Light-DEPENDENT → The light-dependent reactions convert light energy into chemical energy.
The relationships among which variable quantities are expressed by the ideal gas law equation?
A. pressure, volume, temperature, number of moles
B. volume, temperature, number of moles, gas constant
C. pressure, volume, number of moles, mass
D. pressure, volume, temperature, molar mass
Answers
Answer:
A. Pressure, volume, temperature, number of moles
The relationships among pressure, volume, temperature, and the number of moles are expressed by the ideal gas law equation. Therefore, option A is the correct answer.
The ideal gas law equation is PV = nRT, where P represents the pressure of the gas, V represents its volume, n represents the number of moles of gas present, T represents its temperature, and R is the ideal gas constant. This equation describes the behavior of an ideal gas at standard temperature and pressure (STP).
By manipulating the ideal gas law equation, we can calculate various properties of gases, including their density, molar mass, and molecular weight. This equation is widely used in chemical engineering, thermodynamics, and other fields that deal with gases.
Thus, option A is correct.
Learn more about ideal gas law ,here:
https://brainly.com/question/30458409
#SPJ3
What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?
Answers
Answer:
Answer should 133
Explanation:
all you have to do is add the protons and neutrons
The mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.
What is an Atomic mass of an atom?The Atomic mass of any atom may be defined as the mass of an atom that is togetherly constituted by protons and neurons in the nucleus of an atom. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number).
The mass number of Xenon is calculated by the following formula:
The Number of neutrons = Mass number - Atomic number.
where, number of neutrons = 75, and number of protons = 54.
75 = Mass number - 54 (number of protons = atomic number).
Mass number = 75 + 54 = 129 amu.
Therefore, the mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.
To learn more about the Mass number, refer to the link:
https://brainly.com/question/3187640
#SPJ2
Hydrogen protons collide with one another to create:
A). Helium and energy.
B). Boron and energy.
C). Carbon monoxide and energy. D). None of the above.
Answers
Drag electrons back and forth until the molecule of oxygen (O2) is stable. Click Check to confirm your molecule is stable. How many pairs of shared electrons are there in a stable molecule of oxygen?
Answers
Answer:
2 pairs (4 electrons)
Explanation:
In a molecule of oxygen there are 2 oxygen atoms. There are 6 electrons in the outer shells of oxygen atoms. When 2 oxygen atoms form a covalent bond they share their electrons. In a diagram this would be represented by the overlap of the two circles representing the outer shells of both oxygen atoms. If each oxygen atom 'puts forward' 2 electrons into the centre, then 4 will be shared overall for each atom, making both atoms have full outer shells of 8 electrons each. 4 electrons make 2 pairs, hence the answer.
Write a balanced chemical equation for the standard formation reaction of solid calcium oxide (CaO).
Answers
Answer:
2Ca +O2 ----------> 2CaO ( Balanced Reaction)
The balanced chemical equation for the standard formation reaction of solid calcium oxide (CaO) is
Ca + O2 --> CaO2
Heya are balanced equations?A balanced chemical equation is an equation in which the the number of atoms of each elements on both the reactant and products sides are equal.
Calcium oxide is an alkaline which is solid at room temperature and is formed by the reaction of one atom of calcium and two atoms of oxygen.
Therefore, the balanced equation of formation reaction of solid calcium oxide (CaO) is Ca + O2 --> CaO2.
Learn more about balancing equation here:
https://brainly.com/question/26694427