002 (part 1 of 2) 10.0 points For :393 g of butadiene (C,11,) calculate the number of moles. Answer in units of mol.

​

Answer:

Magnesium

Explanation:

Magnesium reacts  with  air (oxygen) to form metal oxide.

Answer:

2 moles of water (H₂O)

Explanation:

We'll begin by calculating the number of mole in 4 g of Hydrogen. This can be obtained as follow:

Mass of H₂ = 4 g

Molar mass of H₂ = 2 × 1 = 2 g/mol

Mole of H₂ =?

Mole = mass / Molar mass

Mole of H₂ = 4/2

Mole of H₂ = 2 moles

Finally, we shall determine the number of mole of water (H₂O) produced by the reaction of 4 g (i.e 2 moles) of H₂. This can be obtained as follow:

2H₂ + O₂ —> 2H₂O

From the balanced equation above, we can see that 2 moles of H₂ reacted to produce 2 moles of H₂O.

Thus, 2 moles of water (H₂O) were obtained from the reaction.

Answer:

B. A Physicist

Explanation:

Answer:

B. X= Elements, Y= Compounds

Explanation:

An element is a substance that is made up of only one type of atom. The atoms of an element can combine together chemically to form a molecule but can still exist as an individual atom e.g. Hydrogen atom; H can form molecule H2. Since only one atom makes up an element, its electrons act independently.

Compounds, on the other hand, are substances that are made up of more than one type of atom chemically combined. A compound can only exist as a molecule because it always contains more than one atom bonded together. However, since more than one atom are involved in the chemical bond that holds them together, electrons are shared with other atoms. Example of a compound is H20 containing atoms of hydrogen and oxygen that are chemically combined.

Answer:

the answer is A ( The basement)

HOPE THAT HELPSSS!!!

Answer the basement

Explanation: i took the test

Answer:

Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular activities. The chemical energy is stored in the form of sugars, which are created from water and carbon dioxide.

Explanation:

Answer:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

Explanation:

During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds. Photosynthesis provides us with most of the oxygen we need in order to breathe. We, in turn, exhale the carbon dioxide needed by plants. Plants are also crucial to human life because we rely on them as a source of food for ourselves and for the animals that we eat.

I hope this helps all of you!

Answer:

1. electrical conductor

2. orbit

3. potential energy

4. magnetic field

5. net force

6. B; repulsion

7. A; copper

8. B; there is no gravitational attraction between you and the cup, but Earth's gravity is stronger, so Earth's gravity pulls the cup down

9. A; the net force is acting in an upward direction

10. A; position 1

11. A; the gravitational force between two objects depends on their masses

12. C; the chemical potential energy of the spring is greatest at position 4

13. C; hand-held compass

14. C; a person skiing down a hill

15. A; the ions will repel each other

16. A; position A

17. three properties of magnets are attraction because they attract certain materials, repulsion because magnetic poles repel, and directive because a magnet that is freely suspended will always point in a north-south direction.

18. to increase the strength of an electromagnet you can either increase the strength current or increase the number of windings.

i hope this helps :)

Answer:

KNO3 (Potassium Nitrate)

Explanation:

I just know.

your answer will be March 3

Answer:

48.018 g/mol

Explanation:

Answer:

The molar mass and molecular weight of CH2O2 is 46.025.

Explanation:

Answer:

most elements are metals

Answer:

Favorable traits that help an organism reproduce are present in their offspring, increasing the offsprings’ likelihood of surviving to reproduce.

Traits that help an organism survive to reproduce are passed on to their offspring.

Explanation:

From the given Statements, optioin A , C and D are correct

The process whereby organisms better adapted to their environment tend to survive and produce more offspring.

The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

The true statements from the given Statements are ;

Hence,From the given Statements, optioin A , C and D are correct

Learn more about Natural Selection here ;

https://brainly.com/question/9830102

#SPJ2

Answer:

Limiting: Lab covers. Books produced: 75. Excess amounts: In explanation

Explanation:

Amount that can be produced with just lab covers: 75 books (150/2)

Amount that can be produced with just lined paper: 150 books (7500/50)

Amount that can be produced with graph paper: 120 (3000/25)

Amount that can be produced with staples: Approximately 83 (250/3)

As we can see, the lab covers are limiting as they can only produce 75 books. So, we can only make 75 books.

You will have 3,750 lined paper left over (or 75 books)

(150-75=75 , 75*50=3,750)

You will have 1,125 graph paper left over (or 45 books)

(120-75=45 , 75*25=1,875 , 3000-1875=1125)

And then you will have approximately 25 staples left over (or 8 books)

(83-75=8 , 8*3=225, 250-225=25)

(Hopefully this is correct, I apologize if I messed up)

Answer:

200 I would think..

Explanation:

Feel free to correct me if i'm wrong

Is there any multiple choice??

Answer:

it will option A . hope it helps

Answer:

options A

Explanation:

the balloon filled up because of the formation of gas bubbles

Answer:

D. 4.20%

Explanation:

Given the following data:

Accepted value = 524 degrees

Experimental value = 546 degrees

To find the percentage error;

Percent error can be defined as a measure of the extent to which an experimental value differs from the theoretical value.

Mathematically, it is given by this expression;

[tex] Percent \; error = \frac {accepted \;value - experimental \; value}{ accepted \;value} *100[/tex]

Substituting into the equation, we have;

[tex] Percent \; error = \frac {524 - 546}{ 524} *100[/tex]

[tex] Percent \; error = \frac {22}{524} *100[/tex]

Note: the negative sign is ignored when calculating percentage error.

[tex] Percent \; error = 0.04199 *100[/tex]

Percent error = 4.199 ≈ 4.2%

Answer:

A lunar phase is simply the shape of the sunlit part of the Moon, as seen from Earth. Phases are so strikingly obvious that we almost take them for granted. Moreover, they can be observed easily throughout the month from the backyard or via a simple glance out the window.

The Moon's shape changes for the following reasons:

The Moon orbits Earth.

Both Earth and the Moon orbit the Sun.

The Moon's orbit is the same length as the time it spins on its axis (about 28 Earth days), which means that we see the same part of the lunar surface all month.

The Sun illuminates both Earth and the Moon.

Get to Know the Lunar Phases

There are eight phases of the Moon to track each month.

New Moon: During New Moon, the side of the Moon facing us is not illuminated by the Sun. At this time, the Moon is not up at night, but it is up during the day. We just can't see it. Solar eclipses can occur during the New Moon, depending on how the Sun, Earth, and Moon line up in their orbits.

Waxing Crescent: As the Moon waxes (grows) into its crescent phase, it begins to show up low in the sky right after sunset. Look for a silvery-looking crescent. The side facing the sunset direction will be lit up.

First Quarter: Seven days after New Moon, the Moon is in first quarter. Only half of it is visible for the first half of the evening, and then it sets.

Waxing Gibbous: After First Quarter, the Moon appears to grow into a gibbous shape. Most of it is visible, except for a dark sliver that shrinks over the next seven nights. Look for the Moon at this time during the afternoon, too.

Full Moon: During the Full Moon, the Sun lights up the entire surface of the Moon that faces Earth. It rises just as the Sun sets and disappears beneath the western horizon when the Sun rises the next morning. This is the brightest phase of the Moon and it washes out the nearby part of the sky, making it difficult to see stars and faint objects such as nebulae.

Ever hear of a Super Moon? That's a Full Moon that happens when the Moon is closest in its orbit to Earth. The press likes to make a big deal about this, but it's really a very natural thing: On occasion, the Moon's orbit brings it closer to Earth. Not every month has a Super Moon. Despite the hype about Super Moons in the media, it's difficult for the average observer to notice one, because the Moon might appear only slightly larger in the sky than normal. In fact, the well-known astronomer Neil deGrasse Tyson pointed out that the difference between a regular Full Moon and a Super Moon is analogous to the difference between a 16-inch pizza and a 16.1-inch pizza.

Lunar eclipses occur only at Full Moons because the Moon is passing directly between Earth and the Sun in its orbit. Due to other perturbations in its orbit, not every Full Moon results in an eclipse.

The other Full Moon variation that often grabs media attention is a "Blue Moon." That's the name given to the second Full Moon that occurs in the same month. These don't happen all the time, and the Moon certainly doesn't appear blue. Full Moons also have colloquial names based on folklore. It's worth reading about some of these names; they tell fascinating stories about early cultures.

Waning Gibbous: After the glorious appearance of Full Moon, the lunar shape starts to wane, meaning it gets smaller. It's visible later at night and into the early morning, and we see a steadily shrinking shape of the lunar surface that's being lit up. The side that is lit up is facing toward the Sun, in this case, the sunrise direction. During this phase, look for the Moon during the day—it should be in the sky in the morning.

Last Quarter: At Last Quarter, we see exactly half the sunlit surface of the Moon. It can be seen in the early morning and daytime sky.

Waning Crescent: The last phase of the Moon before returning to New Moon is called Waning Crescent, and it is exactly what it says: a steadily-shrinking crescent phase. We can see only a small sliver from Earth. It's visible in the early morning, and by the end of the 28-day lunar cycle, it has vanished almost entirely. That brings us back to New Moon to start the new cycle.

Citation for work-Petersen, Carolyn Collins. "The Once-Mysterious Phases of the Moon Explained." ThoughtCo, Aug. 27, 2020, thoughtco.com/what-are-moon-phases-3883581.

Explanation:  

Something shorter-The different shapes of the lit portion of the Moon that can be seen from Earth are known as phases of the Moon. Each phase repeats itself every 29.5 days. The same half of the Moon always faces the Earth, because of tidal locking. So the phases will always occur over the same half of the Moon's surface.

Answer:

Number of silver atoms

=

0.0134

⋅

m

o

l

×

N

A

.  

N

A

=

Avogadro's number

Explanation:

Silver has a molar mass of  

107.87

g

⋅

m

o

l

−

1

.

What does this mean? It means that if I have such a mass of silver, there are Avogadro's number,  

N

A

=

6.022

×

10

23

,  

individual silver atoms.

So all I have to do is divide the mass by the molar mass, and multiply this number (a molar quantity!) by Avogadro's number.  

So, moles of silver  

=

1.45

⋅

g

107.87

⋅

g

⋅

m

o

l

−

1

=

0.0134

⋅

m

o

l

And  

number of silver atoms

=

0.0134

⋅

m

o

l

×

6.022

×

10

23

⋅

silver atoms  

m

o

l

−

1

=

?

?

silver atoms

Explanation:

Answer:

ACTIVITY 1

Sample 1 has a stronger taste of lemon, and is more sour.

Sample 2 has a sweeter taste, my guess is because there's more sugar:lemon juice ratio.

Answer:

0.4193924945 million

Explanation:

3.5(0.119826427)

Answer:

0.905

Explanation:

Answer:

x = 181/200

Explanation:

2534 = 112 . 25 . x (Multiply 112 and 25)

2534 = 2800x (Divide by 2800 from both sides)

x = 2534 / 2800 (Simplify)

x = 181/200 or 0.905

Answer:

jupiter

Explanation:

mercury, venus, earth, mars, jupiter, saturn, uranus, neptune,

Answer:

A

Explanation:

Says it on the side of meh screen :P

(Ez question in lol)

Answer:

360mL is 360 cc

Explanation:

1 ml to cc = 1 cc

Answer:

A=79,N=44

Z=35,A=79

Answer:

Explanation:

Answer:

A=79,N=44

Z=35,A=79