Select the measurement with that represents the least amount of pressure.
Select one:
a. 3 atm
b. 3.039 x 1013 Pa
c. 2.280 x 10^3 mm Hg
d. 40 psi

Answers

Answer 1

Answer:

a 3atm

Explanation:

or d 40 psi because it is true and corect [b 3.0398 21oinwex id cn uerfh uh 837hf uxhoec


Related Questions

Jack has a rock.the rock has a mass of 14g and a volume of 2cm^3.what is the density of the rock?

1
SEE ANSWER

ADD ANSWER

Answers

Answer:

7

g

c

m

3

Explanation:

An object with a mass of 1.2 g takes up a space of 2.4 mL. What is it's density?

Answers

Answer:

The answer is 0.5 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{1.2}{2.4} \\ [/tex]

We have the final answer as

0.5 g/mL.

Hope this helps you

The formula for density is almost always expressed as grams per milliliter in chemistry. To find the density of this object, simply divide the number of grams by the number of milliliters.

Therefore, we get:

1.2g / 2.4 mL = 0.5g/mL

This results in a density of 0.5g/mL!

8. Describe how crystals of copper sulphate are prepared.​

Answers

Answer:

Take a cupful of water in a beaker and add a few drops of dilute sulphuric acid. Heat the water. When it starts boiling, add copper sulphate powder slowly while stirring continuously. ... Crystals of copper sulphate will be seen at the bottom of the beaker.

Hope it helps

Is this actually right

Answers

Answer:

what?????????i don't see a question

Answer:

Yes

Explanation:

Help pleaI’ll give brainliest

Which element has the
greatest number of valence electrons available for bonding?
O selenium
Oboron
O calcium
O chlorine

Answers

The element Chlorine has the greatest number of valence electrons for bonding. This is because selenium has 6 valence electrons, boron has 3 valence electrons, calcium has 2 valence electrons, and chlorine has 7 valence electrons. Therefore we can see that since 7 is the greatest number chlorine has the greatest number of valence electrons.

Which of the following is NOT an example of a chemical change? *
O Corrosion
O Grinding
O Combustion
O Rust

Answers

Grinding as it’s a physical not chemical change :)

helppppppppppppp plzzzzzzzz Identify each structure based on its label.

Compound A is a
amine.
Compound B is a
amine.
Compound C is a
amine.
Compound D is
.

Answers

A I hope it helps :)

Answer:

kldja

Explanation:

A.) primary

B.) tertiary

C.) secondary

D.) ammonia

edge2020

True or false

Each family represents the number of energy levels present in an atom of the element.

Answers

Answer:

true because of the elements

An unknown substance has a volume of 2 cm3 and a mass of 38.6 grams.
What is the density of the sample?

Answers

Answer:

The answer is 19.3 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{38.6}{2} \\ [/tex]

We have the final answer as

19.3 g/cm³

Hope this helps you

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. The chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. The chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production. c. Free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. Chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone.

Answers

Answer:

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer?  Free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone.

Explanation:

The statement for small quantities of chlorofluorocarbons so harmful to the ozone layer is "Free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone."

What is ozone layer?

The ozone layer is a thin layer of air in the Earth's atmosphere that absorbs nearly all of the sun's damaging UV radiation.

What is CFCs?

CFCs (chlorofluorocarbons) are harmless and nonflammable compounds made up of carbon, chlorine, and fluorine atoms.

The earth's protective ozone layer is destroyed by chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and halons, which shield the earth from damaging ultraviolet (UV-B) rays released by the sun. CFCs and HCFCs also warm the earth's lower atmosphere, causing global climate change.

When some substances are exposed to high UV radiation in the stratosphere, they emit chlorine or bromine. Ozone-depleting chemicals are compounds that contribute to ozone depletion (ODS). Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), carbon tetrachloride, and methyl chloroform are examples of ODS that produce chlorine. Halons and methyl bromide are two ODS that emit bromine.

Because there isn't much ozone in the atmosphere, what little there is is critical for protecting the Earth's surface from excessive UV light from the Sun. It turns out that it reacts with chlorine, which means that chlorine effectively eliminates ozone.

When the chlorine in CFCs combines with ultraviolet light, it releases chlorine, which then reacts with ozone, reducing the protection humans get from ultraviolet light, allowing more CFCs to release chlorine, and so on. Multiple ozone molecules will interact with one free chlorine atom, which is free because UV light has hit the CFC molecule. As a result, the damage it can cause is likely to be significantly more than you might imagine.

Hence the correct option is c.

Learn more about ozone layer and CFCs here

https://brainly.com/question/14330630

#SPJ2

Ou are subliming camphor and you note that pure camphor is condensing nicely on the cold finger. You check on the process several minutes later and you see that the amount of camphor on the cold finger has not changed appreciably since the last time you looked at it. However, there is still plenty of impure camphor left at the bottom of the flask. What do you suppose is the reason and what do you need to do.

Answers

Answer:

The reaction is endothermic

Increase temperature of the flask

Explanation:

Sublimation is a phenomenon in which a substance changes directly from solid to gas,without passing through the liquid phase.

Camphor is a sublime substance. The sublimation of camphor is an endothermic reaction. This implies that energy is absorbed in the process.

For an endothermic reaction, the equilibrium position is shifted towards the right hand side by increasing the temperature of the system. Hence, if the flask is heated, more camphor will condense within a shorter time interval.

A physical change is easier / more difficult to reverse than a chemical change.

Answers

Answer:

the answer is that a physical change is easier to reverse then a chemical change.

Explanation: In order for a physical change to take place it's easier to just undo what happened then if it was a chemical change because in order for very few chemical changes to reverse to it's original substance you would need another chemical change.

Please help ASAP 100 points points help I will mark you as brainlister

Answers

this is lithium ion with a +1 charge

Lithium ion with 1+ charge

A roller coaster with a mass of 20kg sits at the top of a 30 m high hill. What is the Potential energy of the roller coaster?
(Formula: PE=mgh)
(g= 9.8m/s)

Answers

Answer:

The answer is 5880 J

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

We have

PE = 20 × 30 × 9.8

We have the final answer as

5880 J

Hope this helps you

What are natural resources

Answers

Answer:

resources that come from the ground or eath naturally which also means that those minerals like coal take hundreds of years to be created

Which of the following wave types must have a medium to travel?
A. Ultraviolet light
B. Microwaves
C. Seismic (earthquake) waves
D. Radio waves
E. X rays

Answers

Answer:

it is B

Explanation:

Answer: B microwaves

What is Aerosol,sol and gel​

Answers

Aerosol: When particles of solid or liquid get dispersed in a gaseous medium, the mixture is known as Aerosol. ... Sol: Sol is a colloidal system where the dispersed phase is solid, and the dispersion medium is liquid. • Gel: Gel is a colloidal system where the dispersed phase is solid, and the dispersion medium is liquid.


What’s this called please help

Answers

Answer:

the answer is a linear

Explanation:

heres a graph different ones at this link

WILL MARK BRAINLIEST!!!! HELPPPP
what is the difference between simple distillation and fractional distillation

Answers

Answer:

A single distillation cycle is enough to separate the mixture. ... Simple distillation is the method used to separate substances in mixtures with significantly different boiling points, while fractional distillation is used for mixtures containing chemicals with boiling points close to each other.

Explanation:

What are the reactants of photosynthesis?

Answers

Answer:

The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.

Explanation:

Describe the specific steps a scientist would take to solve a particular problem

Answers

Answer:

scientific method

Explanation:

- make an observation

- ask a question

- form a hypothesis

- make a prediction based on the hypothesis

- test the prediction

- iterate: use the results to make new hypotheses or predictions  

what is the journey around the sun by earth called, and how long does it take?

Answers

Answer:

Its called ecliptic and it takes 365 days

Explanation:

Answer:

The journey around the Sun by Earth is called a revolution, it takes 365-and-a-quarter-days.

Explanation:

What is the significance of an electronegativity difference of 1.7 between 2
atoms?
O A. It tells which atoms form positive ions and which atoms form
negative ions.
OB. It represents the boundary between what is considered to be an
ionic or a covalent bond.
C. It determines if the 2 atoms will react to form a molecule.
D. It identifies which metal atoms will join together to form metallic
bonds
Am

Answers

B. It represents the boundary between what is considered to be an  ionic or a covalent bond.

Further explanation

Electronegativity is the ability of atoms to attract electrons, especially in covalent bonds (sharing of electron pairs)

In a periodic system, electronegativity increases in a group, from bottom to top, and in a period from left to right.

From this difference in electronegativity, we can determine the ionic compound, polar or non-polar

Pauling determined the electronegativity scale (based on bond energies), between 0.7 - 4 (Fluorine has the highest number of electronegativities: 4)

Polar covalent compounds have a large electronegativity difference, while nonpolar compounds have a small electronegativity difference.

We can use the difference in electronegativity between the 2 bonded atoms to determine their polarity

<0.5: covalent non polar 0.5- 1.7: covalent polar > 1.7 : ion

Example

H₂O

H = 2.1

O = 3.5

H₂O = 3.5-2.1 = 1.4 >> polar

O₂

= 3.5-3.5 = 0 >> non polar

A car travels 45 miles per hour. What is this speed in feet per hour?

Answers

Answer:

64

hopeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

It would be 45 distance for feet per hour

5. Aidan is on a carnping trip with his family. As the temperature decreases
Aidan suggests building a campfire. Which of the following explains why
heat moves from the campfire to the people sitting around it? *

Answers

Answer:

Because heat flows from warmer objects to cooler objects

Explanation:

Please can I have help on these two questions I’ll be very grateful!!!!!!

Answers

Answer:

-1 IS THE CHARGE OF ELECTRON AS THEY ARE NEGATIVE

MARK ME AS BRAINLIEST IF U FOUND IT HELPFUL

Why is the nitrogen cycle considered a closed system?

Answers

Answer:

because nitrogen is fixed by bacteria and assimilated by plants

Explanation:

Answer:

It is a considered a closed system because nitrogen is fixed by bacteria and is taken in by plants.

Explanation:

i need help please!

asap

Answers

Answer:

Earth is pulling up on the book with a force of 4n i think

Explanation:

Which of these statements describes a chemical property?

Answers

Answer:

it rusts when exposed to air

Answer:

A

Explanation:

The transition metals (with the exception of Zn, Cd and Hg) are very much hard and have low volatility. Why Zn ,Cd and Hg has low melting points. (a) These have all their electrons paired. (b) These have maximum number of unpaired electrons. (c) These have very strong metallic bonding. (d) These have more metal-metal bonding.

Answers

Answer:

Zn ,Cd and Hg has low melting points because - These have all their electrons paired.

Explanation:

These have all their electrons paired -: All the electrons in the d-subshell are combined with Zn , Cd and Hg. The metallic bonds present in them are, therefore, weak. This is why they have low points of melting and bolting. therefore , this statement is true. These have maximum number of unpaired electrons. Since , these transition metals have all electrons paired , so this statement is incorrect.These have very strong metallic bonding -: Zn, Cd and Hg d-orbital are completely filled. They have poor metallic bonding and less compact packing due to their fully filled d-orbitals, so all of them are volatile in nature. Therefore, this statement is also not valid .These have more metal-metal bonding. -: Since , their metallic bond is weak , so this statement is not true .

Hence , the correct option is A (These have all their electrons paired).

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