Which of the following is an example of a Lewis base?
O A. H+
B. BF3
O C. NH3
O D. H20+

Answers

Answer 1

Answer:

O C. NH3 is an example of a lewis base


Related Questions

Static electricity is
a closed conducting path
when electrons move easily through objects
build up of electrical charges by friction

Answers

Hey there !

The answer is C. build up of electrical charges by friction


Static electricity is a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.

Hope this helps !

Which of the following is a chemical property of liquid water?
Its density is 1.00 g/cm3.
It reacts with sodium metal to form sodium hydroxide and hydrogen gas
It flows.
It freezes to form ice.
It boils at 100°C.

Answers

Answer:

B) it reacts with sodium metal to form sodium hydroxide and hydrogen gas

Explanation:

B is the only option that show a chemical property, density, freezing, and boiling points are physical properties.

How does the pressure of a container change as the volume is changed?

Answers

Answer: If the volume is decreased, the pressure would increase because the gas molecules have less space to move around. Same goes for the opposite; if the volume increased, the pressure would decrease because the molecules have more space to move and aren't packed as tightly .  

Hope this helps!!!

Is amylopectin a straight chain polysaccharide

Answers

Answer:

hey friend, Amylopectin is a branched chain.

can somebody help me name these organic compound plz​

Answers

Answer:

A. 3–Ethyl–2–methylpentane.

B. 3–Ethyl–1,5,5–trimethylcyclohexene.

Explanation:

To name the compound, we must observe the following:

1. Locate the longest continuous carbon chain. This gives the parent name.

2. Identify the substituent groups attached.

3. Locate the position of the substituent groups by giving them the lowest possible low count alphabetically.

4. Combine the above to name the compound.

Now let us name the above compounds

For compound (A)

1.The longest chain is carbon 5 i.e pentane.

2. The substitute attached are:

Ethyl => CH2CH3

Methyl => CH3

3. Ethyl comes before methyl alphabetically. But considering the structure of the compound, ethyl assume same position from either side of the compound. Therefore, we'll consider the lowest possible count for methyl. Therefore, their position is given below:

Ethyl => CH2CH3 => carbon 3.

Methyl => CH3 => carbon 2.

4. The name of the compound is:

3–Ethyl–2–methylpentane.

Compound B.

This is a cyclic structure.

1. The parent name is cyclohexene.

2. The substitute groups attached are:

Ethyl => CH2CH3

Methyl => CH3

3. Since the compound is unsaturated, the functional group is the double bond. Hence, we shall start our counting from the double bond and also considering alphabetical order of the substituent.

Please note methyl (CH3) appears three times.

Ethyl => CH2CH3 => carbon 3

Methyl => CH3 => carbon 1, 5 and 5.

4. The name of the compound is:

3–Ethyl–1,5,5–trimethylcyclohexene

Consider this reaction:
N2 (g) + 3H2 (9) = 2 NH3 (9). If Q ea, which statement is true?
O A.
The reaction will move forward.
B.
The reaction will move in reverse.
C.
The concentration of the product should decrease.
D.
The concentrations of the reactants should increase.
E.
The reaction is in equilibrium.

Answers

Answer:

Explanation:

its E

trust me i got a 100

Answer:

E. The Reaction Is In Equilibrium.

Explanation:

Plato Answer

A 350. mL air sample collected at 35 degrees C has a pressure of 556 mm Hg.
What pressure will the air exert if it is allowed to expand to 425 mL at 57 degrees
C? Show your work in the space below.​

Answers

Answer:

485 torr

Explanation:

Explanation:

We can solve this equation using the combined gas law:

P1V1/T1=P2V2/T2

Remember, always use the absolute (Kelvin) temperature when working with gas equations.

The temperature conversions are

T1=C+273=35o+273=308K

T2=57C+273=330K

Since we're trying to find the final pressure, let's rearrange this equation to solve for

P2:

P2=P1V1T2/T1V2

Our known values:

P1= 550 torr

V1=350mL

T1=308K

V2=425"mL

T2=330K

Let's plug these into the equation to find the final pressure:

The final pressure after it is subjected to these changes is thus 485torr

How many grams of ammonia (NH3) are present in 5.0L of a 0.050M Solution?

A. 5.2g
B. 4.3g
C. 4.3mol
D. 78g

Answers

Answer:

B

Explanation:

NH3 in a liter is 17 x 0.05 = 0.85g

In 5L = 0.85 x 5 = 4.25 = 4.3g

Answer:

B. 4.3 g

Explanation:

m = 5.0L x 0.050 mol/L x 17.031 g/mol = 4.26g ~ 4.3g

....

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

What type of bond is formed during dehydration synthesis?
O A
carbon bonds between amino acids
B.
carbon bonds between carbohydrates
C. hydrogen bonds between lipids
O D. peptide bonds between amino acids

Answers

The answer is A hope this helps

A carbon bond between the amino acids is formed in a dehydration reaction. So the correct option is A.

What is a dehydration reaction?

A reaction where two smaller molecules are combined in a chemical manner by the removal of an element from each of these molecules is called a dehydration reaction. Organic compounds are classified on the basis of structure. They are classified as aliphatic and aromatic compounds. Different kinds of chemical reactions are involved in the formation of new compounds when there is a change in bonding between the atoms.

There are some chemical reactions that form a molecule and some only show a displacement or substitution of atoms. There are synthesis or combination reactions that involve a combination of two substances to form one molecule.

On the other hand, there are decomposition reactions in which one substance decomposes to form more than one substance. There are displacement reactions which can be single or double displacement. They involve the displacement of one or more components of compounds among each other. Addition, substitution, rearrangement, elimination, and oxidation-reduction reactions are some of the common organic reactions.

Therefore, the correct option is A.

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1. What are the trends for atomic size across a period and down a group for the
main group elements?
2. Draw the following Lewis structures:
a) ammonium ion b) sulfur trioxide c) hydrogen cyanide
3. Using formal charge formula (or electronegativity differences), to determine
the following the best structure, OCS, COS or CSO.

Answers

Answer:

Here's what I get  

Explanation:

1. Trends in atomic size

Atomic size tends to decrease from left to right across the Periodic Table.

You are adding one electron at a time. the electrons repel each other, so the size should increase.

You are also adding a proton to the nucleus. The additional attraction should pull the electrons closer to the nucleus.

The nuclear pull wins, so the atoms get smaller from left to right

Atomic size increases from top to bottom of a Group.

You are adding electrons to an extra shell, so the size should increase.

You are also adding protons to the nucleus, so the size should decrease.

The size of the outer shell wins, so the atomic size increases going down a Group.

2. Lewis structures

(a) Ammonium ion

N is the central atom. The N atom has the positive charge.

(b) Sulfur trioxide

S is the central atom, with a double bond to each of the three O atoms.

(c) Hydrogen cyanide

C is the central atom, with a triple bond to the N atom.

3. COS

The best structure is that of O=C=S. It has no formal charges.

The Lewis structures for the other arrangements have formal charges.

The correct answers of this question is given below.

1. The atomic size increases going down a Group.2. (a) Ammonium ion : The N atom has the positive charge.    (b) Sulfur trioxide : Having double bond to each of the three O    atoms.    (c) hydrogen cyanide : Having a triple bond to the N atom.3. COS and it has no formal charges

What is Periodic table?A table in which the chemical elements are arranged in order of increasing atomic number.A periodic table has 118 known elements The chemical elements are arranged from left to right and top to bottom in order of increasing atomic number.What is the explanation for this answers?1. Trends in atomic size : Atomic size tends to decrease from left to right across the Periodic Table.You are adding one electron at a time. the electrons repel each other, so the size should increase.You are also adding a proton to the nucleus. The additional attraction should pull the electrons closer to the nucleus.The nuclear pull wins, so the atoms get smaller from left to right.Atomic size increases from top to bottom of a Group.Adding electrons to an extra shell, so the size should increaseAdding protons to the nucleus, so the size should decrease.The size of the outer shell wins, so the atomic size increases going down a Group.

2. Lewis structures :

(a) Ammonium ion : N is the central atom. The N atom has the positive charge. (b) Sulfur trioxides :  S is the central atom, with a double bond to each of the three O atoms.(c) Hydrogen cyanide: C is the central atom, with a triple bond to the N atom

3. COS

The best structure is that of O=C=S. It has no formal charges.The Lewis structures for the other arrangements have formal charges.

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NEED ASAP WILL MARK BRAINLIEST ON TIMER
A student determines that she used 0.0665 mol of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solution (H2SO4). What is the molarity of the sulfuric acid?
0.00131 M
0.00262 M
1.31 M
2.62 M

Answers

i think the answer is 1.31m

hope this helps :)

A student determines that she used 0.0665 mole of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solution. The molarity of the sulfuric acid is 1.31 M. Therefore, option C is correct.

What is molarity?

Number of moles of solute per liter of solution is known as molarity.

The balanced chemical equation for the reaction between sodium hydroxide and sulfuric acid is:

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

According to the balanced equation, one mole of sulfuric acid reacts with two moles of sodium hydroxide. Therefore, the number of moles of sulfuric acid in the titrated solution can be calculated as:

moles of H₂SO₄ = (moles of NaOH) / 2

moles of H₂SO₄ = 0.0665 mol / 2

moles of H₂SO₄ = 0.03325 mol

The volume of the sulfuric acid solution used in the titration is 25.00 mL, which is equivalent to 0.02500 L. The molarity (M) of the sulfuric acid can be calculated as:

Molarity of H₂SO₄ = moles of H₂SO₄ / volume of H₂SO₄ solution in liters

= 0.03325 mole / 0.02500 L

= 1.31 M

Thus, option C is correct.

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According to plate tectonics, the continents.
do not move at all
are drifting on a sea of magma
will one day be joined together
"float' on top of the crust

Answers

Hey there!

The answer would be B. are drifting on a sea of magma.


The crust is broken up into giant tectonic plates that ride atop the magma, hot melted-rock material that makes up much of the interior of the Earth. Convection in the molten rock of Earth's mantle drives the movement of the plates. Hotter material rises to the surface, while cooler material sinks toward the core.

Hope this helps !

Answer:

are drifting on a sea of magma.

Explanation: Please mark brainliest.

Need help with these two pls!!

Answers

what is a fire piston?

*a tool for starting a fire, likely invented in Ancient Southeast Asia.*

dont know the second one lol.

CAN SOMEONE HELP ME?!?! IM CONFUSED

Answers

Answer: Solar winds have an influence all the way to about 160 AU from the Sun. About how many kilometers is that?

24,000,000,000 km

48,000,000,000 km

240,000,000,000 km

480,000,000,000 km

Explanation:

To measure the volume of a washing machine, use:
liters
kiloliters
kilograms
tons

Answers

Answer:

kg

Explanation:

Answer:

You should use tons or kilograms because a washing machine is very heavy.

(Hope this helps)

A gas has a volume of 3.00 L at 65.0 C. The same gas has a volume of 11.4 L at 105 C and 1725 mmHg. What was the original pressure of the gas?

Answers

Mm yes diirjrjejekeiejebenwkowe

What are two scientific fields that utilize facial reconstruction?

Answers

Answer:

The facial reconstruction problem arises in various application fields like forensics, anthropology, archeology or history. In forensic science, facial reconstruction comes in the process of identification of deceased people

Explanation:

1-Which reaction shown below is carried out by nitrifying bacteria? I will mark you as brainlist
Choose:

A.{ammonium} to {nitrate}

B.{nitrate} to {nitrogen gas}

C.{nitrogen gas} to{ammonium}

Answers

Answer:

ammonium to nitrate.

Explanation:

they tie em together

As the kinetic energy of particles of matter increase, the distance between the particles?

Answers

The distance between the particles move farther apart. When the kinetic energy of the particles increases it causes the particles to move further apart.

what two factors does elastic potential energy depend upon

Answers

Answer: Spring constant k as well as the distance stretched

Explanation:

Elastic potential energy is Potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched.

Can somebody please help me with these ? how many moles of AI are needed to react with 6 moles of O2?

Answers

Answer:

idkidkdkdkkdkdkdkddk

beudud

Explanation:

lolwoeo3i3iieieiekeididdo

A fox spots a rabbit in a field. The fox begins to chase the rabbit, and the rabbit runs away. Which statement best describes the rabbit's behavior in response to the stimulus of being chased?
Select one:
The rabbit's behavior is a response caused by an internal stimulus.
The rabbit's behavior is a tropism.
The rabbit's behavior is a fight-or-flight response.
The rabbit's behavior is a response caused by hunger.

Answers

Answer:

C. The rabbit's behavior is a fight-or-flight response

Explanation:

The rabbit has a fight or flight response which means that when there is danger, the rabbit will either fight it or run away. In this case it ran away

The response of the rabbit in response to the fox chasing has been the fight and flight response. Thus, option C is correct.

What is a stimulus?

A stimulus can be given as the physical or the chemical messenger that mediates the formation of the functional change in the body. The reaction to the stimulus has been the spontaneous reaction that can form the sudden response forming reaction.

The fox chasing the rabbit has been mediating the formation of the stimulus. The chasing act as the stimulus to the rabbit forming the rabbit to create the response or reaction of running. The reaction that forms with the stimulus of fear and frightening has been the fight and flight response.

The stimulus that has been formed arouses the fear of getting caught and works as the fight and flight response. Thus, option C is correct.

Learn more about stimulus , here:

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What is the similarity between speed and vilocity

Answers

Speed and velocity both represent a way to measure the change in position of an object relative to time. In fact, for a straight line motion, the speed and velocity of an object are the same (since distance and displacement will be the same). Speed and velocity are measured in the same units: meters per second or m/s.
Hope this helps!

Where does your body get the energy needed to transform into kinetic energy to move around all day

Answers

Answer:

food, mostly consists of what you eat.

Explanation:

The body get the energy needed to transform into kinetic energy from food.

Food:

Every body part (muscles, brain, heart, and liver) need energy to work. This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach.

The main sources of energy are: carbohydrates, lipids, and proteins.

Find more information about Food here:

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Which of the following best summarizes photosynthesis?
A.A chemical reaction involving nitrogen and other atmospheric gases
B.An adaptation of plants that allows them to add nutrients to the soil
C.A process by which plants produce sugar using the energy of sunlight
D.An exchange of gases between animals and the air or water of their habitat

Answers

Answer:

c. a process by which plants produce sugar using energy of sunlight

A(n)
image cannot be projected and forms where light rays appear to originate.

Answers

Answer:

Eu não sei o que você está dizendo, mas boa sorte

Answer: Virtual

Explanation:  A virtual image is an image that can not be formed on a screen. This type of an image is formed when the rays of light appear to meet at a point after reflection or refraction. Virtual images are always erect or upright.

Which planet do scientists believe prevented the asteroids in the asteroid belt from forming a planet? Earth Jupiter Mars Neptune

Answers

Answer:

Jupiter

Explanation:

Jupiter prevented any planetary bodies from forming in the gap between Mars and Jupiter, thats why asteroids collide today.

sorry if its wrong .

Answer:

Your answer is Jupiter

Explanation:

I TOOK THE TEST  AND I LEARNED THIS

Inside the retina of our eyes are receptors called rods and cones. Rods measure the brightness we see and cones determine _____.
A) the color we see
B) the white we see
C) the dimness we see
D) the loudness we hear

Answers

I believe the answer is C. 20 characters

a put question in screen shot

Answers

Answer:maybe 2

Explanation:

Answer:

2

Explanation:

Why do we use nuclear energy from power plants?

Answers

Answer:

Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.

Explanation:

Enjoy!

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