L 2.5.2 Test (CST): Computer-Scored Unit Test
Question 5 of 25
How does increasing the temperature affect a reaction?
A. An increase in temperature slows down the reaction.
B. An increase in temperature increases the reaction rate.
C. An increase in temperature lowers the reaction's activation energy.
D. An increase in temperature changes equilibrium concentrations.
SUBMIT

Answer:

the people injected with the drug are the variable group while the people injected with the harmless solution are the control group

Answer:

a

Explanation:

Answer:

A

Explanation:

Density is the amount of space that atoms are compacted in a substance.Apr 25, 2017

Based on the nature of the types of chemical bonding, the example illustrates covalent bonding because electrons are shared between the carbon and hydrogen atoms.

Chemical bonding or combination occurs when atoms of elements combine to form products.

Chemical bonding can either be;

Covalent bonding involves a sharing of electrons by the atoms of elements involved.

Since the example shows electrons being shared between carbon and hydrogen atoms, the example illustrates a covalent bonding because electrons are shared between the atoms.

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Answer:

[tex]1m ^ {3}[/tex]

Explanation:

UwU

Answer:

he combustion of ethane (C2H6) is represented by the equation: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l). In this reaction: (a) the rate of consumption of ethane ...

Explanation:

he combustion of ethane (C2H6) is represented by the equation: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l). In this reaction: (a) the rate of consumption of ethane ...

Answer:

i think it might be 3.8 milligrams but to be honest i dont know im just trying to help

Explanation:

Using value of 1.1×10−10 for the Ksp, 1.0 milligrams of Ag₂CrO₄ will dissolve in 11.5 mL of H₂O.

Mass is defined as the quantity of material that makes up a thing, whereas weight is the force that an object produces. A particle's or an object's mass is a dimensionless number that indicates how much matter is present. Gravity and inertia, which are the two main forces influencing how objects move in space, make mass crucial.

Ag2CrO4 dissociates to form Ag2CrO4 (s). aq 2Ag+ + crO4 (aq)

Ksp = [2Ag+] is an expression for the solubility product constant.

[Ag+] = 2x & [CrO4-] = x 1.1 10 10 = 2[CrO4-] (2x)

2(x) = 4x3 / x = [(1.1×10−10)/4]

1/3 = 3.02 x 10-4 M

Determine the number of CrO4- moles dissolved in 10 ml of water.

Molarity of CrO4- is equal to the number of moles of CrO4- divided by the volume in liters (3.02 x 10-4 M) (10 x 10-3 L)

Number of CrO4- moles equals (3.02 x 10-4)(10 x 10-3) = 3.02 x 10-6 mole.

Number of CrO4- = Number of Ag2CrO4 moles

                             = 3.02 x 10-6 mole

Ag2CrO4's molar mass = 331.73 g/mole.

3.02 x 10-6 mole of dissolved Ag2CrO4 in water

= 0.0010 g,

= 1.0 milligram.

Thus, using value of 1.1×10−10 for the Ksp, 1.0 milligrams of Ag₂CrO₄ will dissolve in 11.5 mL of H₂O.

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The statement that best explains why mass is not conserved in a nuclear change is that; "some of the matter is converted to energy".

In a nuclear reaction, mass is converted to energy. This is the energy that is given out when a new nuclide is formed during a nuclear reaction.

Generally, the scheme of a nuclear reaction is; Parent nucleus + Bombarding particle -------> Daughter nuclei + product particles + energy. This energy is obtained when mass is lost from left toi right in the reaction.

Hence, the correct answer is; some of the matter is converted to energy".

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Answer:

Unit 4 Lesson 2:

Energy Release Quick Check

1. 138

2. The conversion of an atom of one element into a different element through nuclear changes.

3. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change.

4. 82

5. Some of the matter is converted to energy.

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Answer:

By satisfying the duet rule or the octet rule, ions are more stable.

Explanation:

Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. The loss or gain of valence electrons allows ions to obey the octet rule and become more stable.

The octet rule states that an atom is most stable when there are eight electrons in its valence shell. Atoms with less than eight electrons tend to satisfy the duet rule, having two electrons in their valence shell. By satisfying the duet rule or the octet rule, ions are more stable.

I HOPE THIS HELPS!!!!

Answer:

So, you can say that in a hydrogen atom, an electron located on

n i=2

that absorbs a photon of energy

4.85⋅10−19

J can make the jump to n f=6.

Answer:

because of it being that you have inferno dragon plsss

Answer:

AUMENTA EL SALARIO MÍNIMO Y CREA MÁS EMPLEOS

Explanation:

CFCs are 1000-15000 times powerful as compared to greenhouse gas such as CO2.

Chlorofluorocarbons are present in less amount or less abundant than carbon dioxide gas in the atmosphere but they are 10,000 times more powerful as a greenhouse gas.

These CFCS gases can remain in the atmosphere for more than 45 to 100 years. CFCS gases greatly damaged the ozone layer by reacting with it that leads to increase in the diseases such as skin cancer so we can conclude that CFCs are more powerful as compared to carbondioxide gas.

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I am the first one to comment, please give me the brainliest <3

Answer:

111Cd 12.80% stable

Explanation:

Maybe?

Answer:

Layer D

Explanation:

Earth's interior layers are ordered by density. The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere.

Answer:

B.

Explanation:

Answer:

.0000000000000000000003

Explanation:

Answer:

A solution, in science, refers to a type of mixture involving two or more substances. Specifically, the solution definition refers to a type of homogeneous mixture - i.e., a mixture that has a uniform composition and its individual components cannot be distinguished

Answer:

C.Concetrated solution

Explanation:

hope it's help.

if density = m(mass) / v(volume) then the answer would be 3

Answer:

Explanation: Hankins is waiting

Answer:

10.7

Explanation:

The addition of 7.6 + 2.401 + 0.68 = is 10.681.

According to the addition of sig figs, you want your answer to have the same amount of places, after the decimal point, as the least sig-fig figure.

7.6

2.401

0.68

+

----------

10.681 - Draw a line straight down from the least sig-fig figure (7.6)

So the maximum figure after the decimal point is one. Since 8 is greater than 5, you have to round up from 10.6 to 10.7.

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.

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.

Speed 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.

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If an element has three valence electrons, it is most likely a metal.

In the periodic table, metals are found towards the left hand side of the table. Metals have fewer valence electrons than nonmetals. In the periodic table, there are more metallic than nonmetallic elements.

Metals of group 13 typically have three valence electrons. Hence, if an element has three valence electrons, it is most likely a metal of group 13.

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Answer:

option A

Explanation:

hope it helps

Answer:

Note-taking is simply jotting down the steps to solve specific problems, or listing the resources that can help you when learning something new. In order to take effective notes that can help you understand the material, you can use techniques like Cornell Notes which help you to organize your writing in a way that makes it referable when stuck doing independent work.

Answer:

The answer to your question is D. carbon dioxide

Explanation:

Light-DEPENDENT → The light-dependent reactions convert light energy into chemical energy.