Answer:Effect of Catalysts on the Activation Energy. Catalysts provide a new reaction pathway in which a lower Activation energy is offered. A catalyst increases the rate of a reaction by lowering the activation energy so that more reactant molecules collide with enough energy to surmount the smaller energy barrier.
Explanation:
Your answer is in this
In a chemical equation which shows presence of catalyst, activation energy is altered.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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What property is not included in Dalton’s atomic model ?
what is the ideal gas constant?
A.it is a constant that applies only at STP
B.it is a specific constant for a specific gas
C.it is constant that depends on the conditions
D.it is a universal constant for all glasses
List at least three different properties that would help you determine whether the bars are made of the same metal.
Answer:
Refractive index
Heat capacity
Density
Explanation:
Properties that are used to identify materials are called intensive properties. These intensive properties are characteristic of the material and does not depend on the amount of material present.
Thus, if i want to identify whether the three bars are made of the same metal, i can look out for the following properties;
Refractive index
Heat capacity
Density
These properties are intensive properties thus they can be used to identify an unknown substance.
What is the source of all food energy on Earth?
A : decomposers
B : herbivores
C : producers
D : carnivores
The picture below shows what a driver sees in his side view mirror.
Indicate whether each statement is TRUE.
Select all that apply
REALLY URGENT
the mirror causes the van behind to appear further away than it really is.
The mirror allows the driver to see a wide area behind him.
The mirror causes the van behind to appear nearer than it really is.
The mirror causes the van behind to appear smaller than is really is
The mirror causes the van behind to appear larger than it really is.
35
Answer:
True- Mirror causes van to appear closer
Explanation:
Objects in the rear view mirror appear closer than they really are.
Vision and area are limited by the mirrors.
When the sunlight stikes a leaf on a tree, what form of energy is it transformed to?
Answer:
ATP
Explanation:
Answer:
chemical energy
Explanation:
4) How many moles of O2 are produced with 42.0 moles of H2O?
Answer:
1.2353 mol
Explanation:
saturated solution can be changed into unsaturated solution by treating. why??
Answer:
A saturated solution is that which is dissolved as much solute as it is capable of dissolving. By heating the solution a saturated solution can be changed into an unsaturated solution. Without adding any solvent it can be changed into an unsaturated solution. :]
True or False. The loads in a parallel circuit do not necessarily all have the same amount of current in them.
Answer:
TRUE
Explanation:
Explain:
(a) Ethanol should be rectified after distillation.
Answer:
Ethanol (boiling point 78°C) and methanol (boiling point 65°C) are two miscible liquids. There is only a small difference in their boiling points. These two liquids are separated from their mixture by fractional ths distillation.
When vapours of the mixture pass through the fractionating column, repeated liquefaction and vapourisation take place. Subsequently, the vapours of low boiling methanol enter the condenser from the fractionating column, condense to liquid and get collected in the round bottomed flask first. Similarly, ethanol with higher boiling point can be collected later in another round bottomed flask.
help? why is chem SO HARD
Answer:
D. The potential energy of the products is greater than the potential energy of the reactants.
UwU
(reply w the answer or get reported) Please answer this
Explanation:
The distribution of electrons of an atom or molecule in an atomic orbital is called electronic configuration.
1. The electronic configuration of Fluorine: [He] 2s²2p⁵.
2. The electronic configuration of Neon: [He]2s²2p⁶
3. The electronic configuration of Sulfur: 1s²2s²2p⁶3s²3p⁴
4. The electronic configuration of Calcium:[Ar] 4s²
5. The electronic configuration of Iron: [Ar] 3d⁶4s²
Hence, this is the required solution.
what is an equationwhat is a what is a catalyst
WHAT IS OZONE.....................
How does it acts as safeguard?
Explanation:
The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV) radiation from the sun. ... The ozone layer filters out most of the sun's harmful UV radiation and is therefore crucial to life on Earth.
Differentiate between compounds and mixtures using the particle model of
matter.
Answer:
compounds are substance which can be formed by chemically combining two or more elements.
mixtures are substance that are formed by physically mixing two or more substances
What are changed after fushing the cover of the jar?
Answer:
the volume decreases and the pressure increases.
Answer:
When you first set the water balloon on top of the jar, the air pressure outside the jar and the air pressure inside the jar are the same. ... So now there is less air, less stuff, in the jar
[HELP PLEASE !!} Which has a pH below 7?
a
acid
b
base
Answer: A- Acid.
Explanation: Because pH's greater than 7 are alkaline which is basic.
Which statement best describes the role of plate tectonics in changes that occur on Earth?
A: Convection currents in the mantle cause mountain ranges to slowly collapse over time.
B: The subduction of oceanic crust cools the mantle and prevents volcanic eruptions.
C: The movement of plates builds pressure that is released during an earthquake.
D: Seafloor spreading causes ocean basins to get smaller and shallower over time.
Answer:
the answer is A i learned this in class and i had the exact same question
what happens when two of the atoms get close together in javalab ionic bond simulation? (I've been messing with this thing for a hour and I still dont get what's happening)
Lion on a clifs edge pounces onto a deer below and consumes it what are the three energy transformations
Answer:
Energy from the question above: is converted first from gravitational potential energy, to mechanical energy, then finally to chemical energy.
Gravitational potential energy— mechanical energy— chemical energy
Explanation:
The Lion on the clifs edge, is above the earth's surface, has its energy stored in the form of gravitational potential energy. Gravitational energy = mgh (m = mass, g = gravitational field, h = height). The lion pouncing on the deer now has mechanical energy which comprises the addition of the lion's potential energy and its kinetic energy. After consuming the deer, the energy is in chemical energy which is important to build molecules of glucose.
What is the percent yield for the reaction below when 544.5 g SO2 and 160.0 g O2 produce 382.0 g SO3? 2SO2(g) + O2(g) 2SO3(g) A. 56.1% B. 54.2% C. 23.9% D. 47.7%
Answer:
Option A.
Explanation:
Balanced equation is:
2SO₂ (g) + O₂(g) → 2SO₃(g)
First of all, we need to determine the limiting reagent. We convert mass to moles:
544.5 g . 1 mol / 64.06g = 8.5 moles of sulfur dioxide
160 g . 1mol / 32g = 5 moles of oxygen
Ratio is 1:2. 1 mol of oxygen needs 2 moles of sulfur dioxide
5 moles of oxygen may react to (5 . 2) /1 = 10 moles of SO₂
We only have 8.5 moles of SO₂ but we need 10 moles. In conclussion limiting reagent is SO₂.
Ratio is 2:2. 2 moles of SO₂ can prdouce 2 moles of SO₃
Then 8.5 moles of SO₂ must produce 3 moles of SO₃
We convert mass to moles, to determine the theoretical yield (100 % yield reaction) → 8.5 mol . 80.06 g /mol = 680.51 g
Formula for percent yield is: (Produced yield / Theoretical yield) . 100
(382 g / 680.51g) . 100 = 56.1 %
Which of the following accurately describes a Brønsted-Lowry acid?
A)
A Brønsted-Lowry acid receives a protein and has a matching conjugate acid.
B)
A Brønsted-Lowry acid donates a proton and has a matching conjugate base.
C)
A Brønsted-Lowry acid receives a proton and has a matching conjugate base.
D)
A Brønsted-Lowry acid donates a protein and has a matching conjugate acid.
Answer:
B. A Brønsted-Lowry acid donates a proton and has a matching conjugate base.
Explanation:
Here's HA is bronsted acid and its conjugate base pair is A-.
Answer:
Explanation:
The actual answer is B. The equation has an acid on one side and a base on the other. The acid donates a proton. Donates means gives up the equivalent of a proton.
5. Which particle can not be accelerated by the electric
or magnetic fields in a particle accelerator?
A) neutron
B) proton
C) alpha particle
D) beta particle
Answer:
A. neutron
Explanation:
Neutrons cannot be accelerated in an electric or magnetic field because they are neutral in charge.
Multicellular organisms are organized into tissues, organs, and organ systems.TRUE OR FALSE
Answer:
True i think..............
dont know how to do this one someone pls help?
Answer:
the answer is C There is simply more collisions
Which of the following statements explains how temperature affects the rate of a reaction ? (5 points ) When temperature decreases , collision of particles increases . When temperature decreases , kinetic energy increases . When temperature increases , particles move slower . When temperature increases , particles move faster
Answer:
As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.
Explanation:
As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.
The statement which explains the affects to temperature to the rate is that when temperature increases, particles move faster.
What is the rate of reaction?Rate of any reaction gives idea about the speed of the completion of any chemical reaction.
If temperature of the chemical reaction increases, then the movement of the particle increases.Fast movement increases the collision.And more collision in turn increases the rate of the reaction.Hence, when temperature increases, particles move faster.
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Question 7 of 25
The diagram shows the direction trade winds blow below and above the
equator. What causes the trade winds to move at an angle rather than straight
toward the equator?
for Easterlies
Answer:
A. The Coriolis Effect bends them
Explanation:
The Coriolis Effect is a force that causes objects and other things that are not attached to the ground and which are moving over a large distance around the Earth such as the trade winds or air planes, to take an apparent curved path in their motion rather than moving in a straight line, due mainly to the rotation of the Earth
The Coriolis Effect is named after French mathematical physicist Gaspard-Gustave de Coriolis
What is ppm?
A. Concentration of a solute in grams/106 grams solution
B. Concentration of a solute in mol/L solution
C. Concentration of a solute in mol/kg solvent
D. Concentration of a solute in mol/mol solution
SUBMIT
HURRY!!!!
Answer:
This is an abbreviation for "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water. Seeing ppm or mg/L on a lab report means the same thing.
someone help me with this please
Count the number atoms in the following compound
3 Al(OH)3
AL=
O
H=
1
2
Answer:
Explanation:
Let us look closely at the compound, Count the number atoms in the following compound Al(OH)3;
We shall considered the number of each atom present in this compound.
There is one atom of aluminum present
There are three atoms of oxygen present
There are three atoms of hydrogen present
Hence, there are a total of seven atoms of different elements in the compound.