Chemistry High School

1. Ozone in Earth’s atmosphere is important because it

A)absorbs harmful pollution.

B)absorbs harmful radiation.

C)helps clouds form.

D)causes rain to fall.


2.


A. a
B. b
C. c
D. d

1. Ozone In Earths Atmosphere Is Important Because ItA)absorbs Harmful Pollution.B)absorbs Harmful Radiation.C)helps

Answers

Answer 1

Answer:

B

Explanation:

Related Questions

3.00 Liters of gas are stored at standard temperature and pressure. If the volume of the gas is increased to 4.00 L at a constant temperature what is the new pressure of the gas

Answers

The new pressure of the gas : 0.75 atm

Further explanation

Boyle's Law  

At a constant temperature, the gas volume is inversely proportional to the pressure applied  

[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]

P₁=1 atm ⇒ standart temperature and pressure (STP)

V₁=3 L

V₂=4 L

[tex]\tt P_2=\dfrac{P_1.V_1}{V_2}\\\\P_2=\dfrac{1\times 3}{4}\\\\P_2=0.75~atm[/tex]

When the the and i do

How many neutrons does an atom of
Copper have in its nucleus?

Answers

answer:34.55
explanation:number of neutrons=mass number-atomic number
the mass number for copper is 63.55 so you do 63.55-29 (29 is the atomic number) and you would get 34.55

In the reaction below, how would adding more of reactant A affect the equilibrium of the system? (2 points)
A + B ⇄ C + D

a
Shift it to the right toward the products.

b
Shift it to the left toward the reactants.

c
Equally create more products and reactants.

d
It would have no effect.

Answers

Answer:

a . Shift it to the right toward the products.

Explanation:

In the reaction, if more of the reactant A is added to the system, the reaction will shift towards the products.

If a system at equilibrium is disturbed by changing the concentration of one of the substances, all the concentration will change until a new equilibrium point is reached. If we add more reactants, the concentration is increased and the reaction shifts to the right so as to maintain the constancy of the equilibrium constant.

Answer: a . Shift it to the right toward the products.

Explanation:

ik i already asked this but i need diff point of views
I need advice...
ive been skipping out on having my vitamins and pills for awhile without telling my parents. i just dont like taking pills and vitamins so my habit is to throw them away. I read that this can really hurt you and idk what to do. Will taking them again save me?

Answers

Answer:

Is it prescribe to you?If so than yes if not then no need to

Explanation:

If you need them to survive then you should take them. I take vitamins and pill, vitamins just by my parents want me to, and pills for a stomach ache that I sometimes get. I don’t take my vitamins all the time, and my pills I do only when I feel like I need them. I think you should take if you really need it. But it’s your choice and this is my opinion

A brick is resting on a smooth, level surface. A student applies a force of
5 N to the brick in order to move it to the right. The magnitude of the
force of fiction on the brick is also 5 N. Which statement best describes
the efect of these two forces on the brick



A the net force in the brick is 10 N toward the right, and the brick begins to move.

B the net force on the brick is 0 N, and the brick begins to move.

C the net force on the brick is 0 N, and the brick remains at rest.

D the net force on the brick is 10 N toward the right, and the brick remains at rest.

Answers

Answer: C) The net force on the brick is 0 N, and the brick remains at rest.

What % of the earth's freshwater is found in glaciers and ice packs? 0.03% 0.03% 3% 3% 24.9% 24.9% 75%

Answers

Answer:

En verdad solo el 0,025% del agua de la tierra es dulce

Explanation:

Marcy creates a model that compares elements and compounds. Her model is shown.

Which statement can Marcy support with her model?
An element is highly reactive, and a compound is stable.

An element can exist in any state, and a compound can only be liquid.

An element contains multiple substances, and a compound contains only one pure substance.

An element is made of a single type of atom, and a compound is made of two or more atom types.

Answers

Answer:

Explanation:

the asnwer is acceleratiin

I NEED THIS ASAP!!

How many moles of chlorine gas are contained in 9.02 x 1023 molecules? ​

Answers

9227.46

Hope this answers your question!

Which wave has the higher frequency?

A. Bottom
B. Top

Answers

The top one does because there are more and it’s closer

Explain why naturally occurring minerals in rocks often have a visible crystalline structure. ​

Answers

With a definite chemical composition (every time we see the same mineral it has the same chemical composition that can be expressed by a chemical formula). and a characteristic crystalline structure (atoms are arranged within the mineral in a specific ordered manner).

Hope this helps （╹◡╹）

Plz help bc this s due at exactly 3:30pm

Answers

Answer:

Is it talking about the differences about them or the ways they are the same

Explanation:

I’m pretty sure it’s d.

Describe the octet rule.

Answers

Answer:

The octet rule is a chemical rule of thumb that reflects the observation that main group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.

Explanation:

HELP PLEASE THIS IS CONFUSING

Answers

Number of moles = 8.3 x 10⁻¹³

Further explanation

The mole is the number of particles(molecules, atoms, ions) contained in a substance

1 mol = 6.02.10²³  particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's =  6.02.10²³

5 x 10¹¹ atoms of Silver :

[tex]\tt mol=\dfrac{5\times 10^{11}}{6.02\times 10^{23}}=8.3\times 10^{-13}[/tex]

The diagram shows a certain kind of cell with all of its major parts labeled.



Which statement is supported by the diagram?

The cell must be eukaryotic because it has a cell membrane and a cell wall.
The cell must be prokaryotic because it has a cell membrane and a cell wall.
The cell is eukaryotic because it does not have any membrane-bound organelles.
The cell is prokaryotic because it does not have any membrane-bound organelles.

Answers

Answer:

I think it's the last one

D. The cell is prokaryotic because it does not have any membrane-bound organelles.

Explanation:

The difference between eukaryotic and prokaryotic cells are that the eukaryotic cells have a nucleus and they have membrane-bound organelles, and prokaryotic cells don't.

Hope this Helps!

Which of these equalities is not correct?
a. 100 cg = 18
c. 1 cm3 = 1 mL
b. 1000 mm = 1 m
d. 10 kg = 1g

Answers

Answer:

a. 100 cg = 18

is wrong

Explanation:

Is a CAS number a physical or chemical property

Answers

Chemical


Hope that helps

What is the energy of a wave having a frequency of 9.83 x 1013 Hz?

Answers

Answer:

9.95779 Hz

Explanation:

which type of rock is most likely to form because high heat and pressure?

Answers

Answer:

metamorphic

Explanation:

Calculate the energy of the lasers in a Blu-ray player, which emit at a wavelength of 4.05x10−7 m.

Answers

Answer:

4.907 × 10^-19 J

Explanation:

The energy of the lasers in a Blu-ray player can be calculated by using;

E = hf

Where;

E = Energy of laser (J)

h = Planck's constant (6.626 × 10^-34 J/s)

f = frequency (Hz)

However, the frequency must be known first in order to calculate the energy. The frequency can be calculated using the formula:

f = v/λ

Where:

λ = wavelength (4.05x10−7 m.)

v = speed of light (3 × 10^8m/s)

f = frequency (Hz)

f = 3 × 10^8 ÷ 4.05 x 10^−7

f = 0.7407 × 10^(8 + 7)

f = 0.7407 × 10^15

f = 7.407 × 10^14 Hz

Using E = hf

E = 6.626 × 10^-34 × 7.407 × 10^14

E = 49.07 × 10^(-34 + 14)

E = 49.07 × 10^-20

E = 4.907 × 10^-19 J

Chemical equations need to be _________


Long

Periodic

Balanced

Advanced

Answers

Answer:

advanced

Explanation:

Answer:

Balanced

Explanation:

..............

Please Help 30 Points + Brainlest Look At The Image Below And Answer The Flowing Question

Answers

Answer:

Between A and D

Explanation:

HOW MANY MOLES ARE IN 2.6 X 1024 ATOMS OF SILICON?

Answers

Answer:

Let x moles of silicon contains 2.8x10^24 atoms. 6.02x10^23 atoms are present in 1 mole of Si. Therefore 2.80x10^24 atoms are present in = 2.8x10^24/6.02x10^23 = 4.65 moles of Si.

Explanation:

8.In a solution, this is what you have the least of.
(1 Point)
Solvent
Solute
Solubility
Suspension

Answers

Answer:

Solute

Explanation:

A solution is made up of combination of solute and solvent.

The solute is the solid dissolved in a solvent.

Solutions are homogeneous mixtures of solutes and solvents.

In a solution the solutes are evenly distributed in the solvent. The solute is the substance dissolved to make the solution. It is usually present in smaller amount than the solvent. The solvent is the dispersing medium.

which number indicates the energy level of an atoms valence electrons

Answers

Period number
Hope this helps!!

15. Why do many substances dissolve easily in water?

Answers

Answer:

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. ... Water molecules have a polar arrangement of oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge

Explanation:

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Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. Water molecules have a polar arrangement of oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge

Which of the following is NOT
an example of an atom?
A. A water molecule
B. The smallest part of oxygen
C. The smallest part of helium

Answers

Answer:

The answer is neither

Explanation:

All of the following things all have atoms in them therefor,its neither.

Answer:

A. a water molecule

Explanation:

It’s for Acellus

What are different things you need to know before performing a experiment ?

Answers

before starting an experiment. ...
Wear the right kind of clothing and gear. ...
Be aware of safety equipment and where it's located. ...
Fill out your lab form as you conduct your experiment. ...
Complete your lab report as soon as possible after the lab.
You should always know what you’re working with so you can have the proper safety gear such as goggles, gloves, lab coat, etc.

Elements in Group 18 form which ion?
A. 1
B. +1
C. -1
D. 0

Answers

The answer is B. +1

For visible light, explain how wavelength and energy vary for the different colors. Provide the trends in wavelength for the spectrum of light (purple to blue to green to yellow to orange to red). How is this different for energy?

Answers

Answer:

See explanation

Explanation:

If you look closely at the image attached, you will discover that the order of increasing wavelength in the visible spectrum is;

violet < indigo< blue < green < yellow < orange < red

On the order hand, the energy of the photons increases in the order;

Red < orange < yellow < green < blue < indigo < violet

Since energy follows a trend opposite to that of wavelength, we can see that the greater the wavelength of light, the lower the energy of photon corresponding to that particular colour.

Global Positioning System signals can tell you

Answers

Answer:

GPS use satellites and receivers to determine location. GPS can be used to find exact location, and relative location, so how far away you are from somewhere else. It can also give coordinates and directions.

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