Which is the correct Lewis dot structure of NH2-?

Answers

Answer 1

Answer:

Explanation:

because it can share and remain with ither electrons

Related Questions

Cells can regulate different processes in two ways. They can turn on and off the genes that make enzymes, or they can

A)

increase the activation energy of a reaction.

B)

increase the amount of energy needed to carry out the preferred process.

C)

regulate the enzymes that are already made.

D)

decrease the amount of energy needed to carry out the preferred process.

Answers

B.
Increase the amount of energy needed to carry out preferred process

. A circuit is set up with two parallel resistors, each of a resistance of 250Ω. a. What is the total resistance for this circuit?

Answers

Answer:

125 ohms

Explanation:

since they're parallel we do

1/total resistance = (1/250 ohms) + (1/250 ohms)

then you get 2/250 ohms

then you flip it so it's equal to total resistance/1

250÷2= 125

Directions: Each set of lettered choices below refers to the numbered statements immediately following it. Select the one lettered choice that best fits each statement. A choice may be used once, more than once, or not at all in each set. The following questions refer to the below molecules: (A) CO2 (B) H2O (C) CH4 (D) C2H4 (E) PH3 The molecule that has trigonal pyramidal geometry

Answers

Answer:

The given molecules are:

(A) CO2 (B) H2O (C) CH4 (D) C2H4 (E) PH3

Which one has trigonal pyramidal geometry?

Explanation:

According to VSEPR (valence shell electron pair repulsion) theory, a molecule with a central atom having hybridization sp3 and with one lone pair of electrons has trigonal pyramidal geometry.

Among the given molecules,

CO2 has central atom carbon with sp hybridization without lone pairs.

So, it is a linear molecule.

H2O, the central atom is oxygen with sp3 hybridization and oxygen has two lone pairs. So, its geometry is V-shape or bent.

CH4 has central atom carbon with sp3 hybridization and no pairs.

So, its geometry is tetrahedral.

C2H4 ethene has carbon atoms as the central atoms with sp2 hybridization and carbon has no lone pairs.

So, its geometry is trigonal planar.

Answer:

PH3 has central atom P with sp3 hybridization.

P has one lone pair on it.

Hence, the geometry of PH3 is trigonal pyramidal.

On a warm sunny day, a deer is searching something to drink. The deer is most likely responding to which kind of stimulus?

Answers

Answer:

External stimulus of thirst

Answer:

your answer is: the external stimulus of thirst

Explanation:

I took the test :)) hope this helps!!!!!!

write an equation for the reaction in which hydrochloric acid neutralises sodium hydroxide

Answers

Answer:

Explanation:

A salt is a neutral ionic compound. Let's see how a neutralization reaction produces both water and a salt, using as an example the reaction between solutions of hydrochloric acid and sodium hydroxide. The overall equation for this reaction is: NaOH + HCl -> H2O and NaCl.

You are given a sample of an element with ONE valence electron.

EXPLAIN how and where to find this element in the periodic table

Answers

Answer:

the amount of valence electron, cna be found in the periodic table, which is called the atomic number which is top of the symbol

hope this helps!!! best fo luck to you

what is formed when oxyhaemoglobin splits

Answers

Explanation:

The haem is in turn split into iron , which forms chemical compounds as part of the blood iron pool available for future hemoglobin synthesis...

hope this help !!

How does anatomy provide evidence for evolution?

I'll give brainlist!! Simple answer please.

Answers

Anatomical evidence of evolution focuses on similarities and differences in the body structures of different species. ... Similarities in anatomical structures of different species signify that the two species have a relatively recent common ancestor.

Please somone help me with a chemistry question brainliest to whoever answers correctly and 20 points

Answers

Answer:

3132 is the answer

Explanation:

3BaCl2 + Al2S3 → 3BaS + 2AlCl3

Answer:

Explanation:

Hope this helps u !!

_ As + _ NaOH → _Na3ASO3 + __ H2

Answers

Answer:

2As + 6NaOH =2Na3AsO3 +3H2

Explanation:

2As + 6e- = 2As³ ,this is an oxidation reaction

6H¹ +6e- =6H⁰ ,this is reduction process

the above reaction exhibit a redox redox reaction As acts as a reducing agent while NaOH acts as an oxidizing agent.

A student needs to make a solution of 308 mL of 0.02 M of Copper (II) Sulfate. All they have available is a solution of 0.250 M. How many liters should they use?

Answers

Answer:

this link not hacl belive me

https://www.flinnsci.com/api/library/Download/18ce587821c24fb3b0ad7d878bd6a3d9Explanation:

HELP ;-;
Vanillin, C8H8O3, the principal component of vanilla beans, is very similar to glucose, C6H12O6 a type of sugar. Brittany Spears has a life threatening allergy to vanillin. After one of her concerts she was found dead in her dressing room. A glass lined with a white powder was found smashed on the floor next to her. Police think the glass was lined with vanillin suggesting she was murdered. A 2.54 g sample of this powder underwent carbon-hydrogen analysis. It’s combustion was found to produce 5.875 g of CO2 (g) and 2.41 g of H2O(g) . Find the empirical formula of this compound and determine if Brittany may have been poisoned?
b) Is this evidence enough to conclude for certain that the identity of the powder on the glass is indeed vanillin? Why or why not?

Answers

Answer:

The empirical formula is: CH2

Th powder is not vainillin

Explanation:

We can find empirical formula of a compound CₐHₓOₙ knowing that moles CO2 = Moles C, 2 Moles H2O = Moles H and that we can find the mass of oxygen by the difference of masses of the atoms:

Moles C = Moles CO2 -Molar mass: 44.01g/mol-

5.875g * (1mol/44.01g) = 0.1335 moles C * (12.01g/mol) = 1.60gC

Moles H2O and moles H -Molar mass: 18.01g/mol-

2.41g H2O * (1mol / 18.01g) = 0.1339 moles H2O * (2mol H / 1mol H2O) =

0.2676 moles H * (1g/mol) = 0.27g H

The empirical formula of this compound is the ratio of C:H:

0.2676 moles H / 0.1335 moles C = 2

The empirical formula is:

CH2

In vainillin, the moles of Carbon = Moles of Hydrogen. the experiment shows the moles of hydrogen are twice the moles of carbon. Thus, the powder is not vainillin

3
.
The volume occupied by one mole of an ideal gas at 273K and 1.01x10% Pa is 22.4 dm'mol".
What volume of hydrogen, in dm", is produced when excess magnesium ribbon reacts with 100 cm?
of 2.00 mol dm hydrochloric acid?
Mg(s) + 2HCl(aq) → MgCl, (aq) + H2(g)
A.
0.100
B.
2.24
C.
4.48
D.
22.4

Answers

Answer:D

Explanation:

Will give brainliest

What is ozone depletion in simple words

Answers

Answer:

Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. It is destroyed more quickly than it is created

Answer:

Ozone depletion, gradual thinning of Earth’s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The thinning is most pronounced in the polar regions, especially over Antarctica. Ozone depletion is a major environmental problem because it increases the amount of ultraviolet (UV) radiation that reaches Earth’s surface, which increases the rate of skin cancer, eye cataracts, and genetic and immune system damage. The Montreal Protocol, ratified in 1987, was the first of several comprehensive international agreements enacted to halt the production and use of ozone-depleting chemicals. As a result of continued international cooperation on this issue, the ozone layer is expected to recover over time.

Under what conditions is AG for a reaction always positive?

Answers

When H is positive and S is negative

The chemical reaction
2 H2 +O2 → 2 H20 is a:
a. synthesis reaction
b. decomposition reaction
c. single displacement reaction
d. double displacement reaction
e. combustion reaction

Answers

Answer:

double displacement reaction

En la electrosis del cloruro de sodio (Na Ci) el cloruro es atraido por elcatodo. Falso o verdadero. Y porque?

Answers

Answer:

Falso

Explanation:

La electrólisis es la descomposición de una solución cuando la corriente continua se pasa a través de ella.

La corriente entra y abandona el electrolito a través de los electrodos. El electrodo positivo se llama el ánodo mientras el electrodo negativo se llama cátodo.

Los iones positivos se mueven hacia el cátodo, mientras que los iones negativos se mueven hacia el ánodo.

Dado que el cloruro es un ion negativo, se mueve hacia el ánodo y no hacia el cátodo.

Please help I have chemistry final

Answers

Answer:

Tick

Explanation:

magnesium is not a good conductor has some free electrons but it is not used that much in the industries because of other better alternatives.

You can tick number 5 as wlee. Good luck

Answer:

the answer is a

Explanation:

it'sa silver-white an earth metal

How are moles and particles related? How could you find the number of particles in 4 moles of a substance?

Answers

Answer:

so in one mole of atom there are 6.02×10^23.

answers to B is 2.41×10^24

Explanation:

use this equation

number of particle=moles X 6.02×10^23

=4 X 6.02 ×10^23

=2.41×10^24

hope this make sense:)

The number of particles present in 4 moles of a substance is 24.088 particles.

What is moles?

Moles is a unit to express the amount of any substance and in one mole of any substance 6.022 × 10²³ particles of that substance are present and this number is known as Avogadro's number.

As in 1 mole = 6.022 × 10²³ particles are present

In 4 moles = 4 × 6.022 × 10²³ = 24.088 particles are present

Hence, 24.088 particles are present in 4 moles.

To know more about Avogadro's number, visit the below link:
https://brainly.com/question/10614569

Beryllium is in Group 2.
What does this tell you about the electronic structure of beryllium?

Answers

Answer:

[He] 2s²

Explanation:

Question 9 (1 point)
If a mylar balloon is filled with gas to a volume of 2.9 L at a temperature of 20 degrees celcius and then heated with a heat gun to 150 degrees
celcius, what is the new volume (assume no air escapes the balloon)?

Answers

Answer:I’m not sure

Explanation:free trial

What is stoichiometry?

Answers

(chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers)

Answer:

hope it help u !!!!

Explanation:

Stoichiometry is the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers

How do catalysts increase reaction rates? *
By increasing the activation energy.
By broadening the energy barrier.
By forming an activated complex with lower energy.
By changing the net thermodynamics of the reaction.

Answers

Answer:

By forming an activated complex with lower energy.

Explanation:

When catalyst is added to a reaction , it forms an activated catalyst which has lower activation energy . So initiation of reaction requires less energy and reaction becomes fast .

Hence third option is correct.

A 12 inch object is placed 30 inches in front of a plane mirror

Answers

Answer:

12 inches

Explanation:

i got it right in the Same question

ASAAAP HURRRY PLS!!!
Where in aerobic respiration is the largest amount of energy produced?

A)

At the beginning of the cycle, when glucose is oxidized to pyruvate.

B)

At the end of the electron transport chain, when oxygen is reduced.

C)

At the end of the electron-transport chain, when oxygen is oxidized.

D)

At the beginning of the electron transport chain, when oxygen is oxidized.

Answers

C or D! When reduced coenzymes produce in the process of the cycle, are oxidized in the process of oxidative phosphorylation in electron transport chain! I hope this helps :(

it’s D! at the beginning of the electron transport chain, the oxygen is oxidized.

CaC0³ scientific name is?

Answers

Answer:

CaC0³ scientific name is Calcium carbonate

Explanation:

Have a great summer :)

En términos de energía, ¿a qué se debe que sea más difícil detener un camión en comparación a una bicicleta?

Answers

Answer:

hola

Explanation:because si

is kcn a ternary ionic compound?

Answers

Answer:

The given molecule is KCN.

Is it a ternary ionic compound?

Explanation:

A ternary ionic compound is one that consists of at least one polyatomic ion/radical.

In the given molecule,

the ions present are:

K+ and CN-.

CN- is a polyatomic acidic radical.

Hence, the given molecule is ternary ionic compound.

What benefits and drawbacks do you see with maintaining and preserving nature through national parks?

Answers

Teri maa ka bhosda bosda bosda

In a solution containing 21.2 g sodium carbonate in 1.50 L of solution, calculate
the concentration of the sodium and carbonate ions.

Answers

Answer:

0.13 molL-1

Explanation:

We must first obtain the number of moles of sodium carbonate as follows;

Number of moles = mass/molar mass

Number of moles = 21.2 g/106 g/mol

Number of moles= 0.2 moles

Number of moles = concentration × volume

Volume = 1.50 L

Concentration = number of moles/volume

Concentration = 0.2 moles/1.5 L

Concentration = 0.13 molL-1

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