Need help with question 4.) hurry please ASAP

Answer:

In molecular hydrogen, H2H2, the two hydrogen atoms are joined by a nonpolar covalent bond. There’s a lot to unpack in that term, so let’s get started.

What is a covalent bond? A covalent bond happens when two atoms share electrons. (Compare it to an ionic bond, which happens when one atom loses electrons to the other atom.) In a single covalent bond, each atom shares one electron with the other atom, so there are a pair of electrons that simultaneously belong to both atoms.

Sometimes the atoms share electrons evenly; sometimes they don’t. If one of the atoms has a greater attraction for electrons than the other atom does, the electrons are drawn more strongly to one side of the bond than to the other. We call that a polar covalent bond. But in the case of H2H2, where both atoms are exactly the same, the electrons are evenly distributed. That’s called a nonpolar covalent bond.

If you want to get even more technical, you could say that the bond between the hydrogen atoms is a sigma bond. Covalent bonds happen when atoms’ orbitals overlap. (Orbitals are the regions where electrons are most likely to be found.) A sigma bond is formed when the area of overlap is directly between the two atomic centers. (Orbitals can also overlap side-to-side, which is called a pi bond, but that’s not what happens in a hydrogen molecule.)

Answer:

Yes

Explanation:

"a foreigner, especially one who is not a naturalized citizen of the country where they are living" is what we define as an alien

So we can say to ants we are aliens because we aren't a naturalized citizen in their country.

Answer:Yes aliens are real because the reason why i think this is because In the good old days, the arrival of UFOs on the front page of America’s paper of record might have seemed like a loose-thread tear right through the fabric of reality — the closest that secular, space-race America could have gotten to a Second Coming. Two decades ago, or three, or six, we would’ve also felt we knew the script in advance, thanks to the endless variations pop culture had played for us already: civilizational conflicts to mirror the real-world ones Americans had been imagining in terror since the beginning of the Cold War. And this is why i think aliens are real.

Explanation:Hope this helped also may i plz have brainlist?

Answer:

LD50 is the amount of a material, given all at once, which causes the death of 50% ... LD100 Lethal dose for 100% of the animal test population ... Researchers can do the test with any animal species but they use rats or mice ... quoted as parts per million (ppm) or milligrams per cubic metre

Explanation: hope this helps :)

Answer:

oil

Explanation:

Water: 1.00

Light Corn Syrup: 1.33

Vegetable Oil: 0.92

Answer:

A

Explanation:

It is correct please I hope it helps! :)

Answer:

I think option A..

Explanation:

hope it's help uu

if wrong then sry

Answer:

A. Plants remove Co, from the atmosphere and use it to create glucose

Answer:

okay so lets say i drop a ball that weighs 2 pounds off a building and a ball that ways 1 pound off the building at the same time the lighter ball would hit the ground first because its lighter and so they heavier it is the slower it drops the lighter it is the faster it drops

Explanation:

Answer:

Hello, I don't really have an actual answer, but I was hoping you could explain it to me? I have the same project and I am kind of confused.

Explanation:

Thank you and have a great day :)

Answer:

Explanation:

1.5 moles to molecules

1 mole = 6.02 x 10²³ molecules

1.5 moles = 6.02 x 1.5 x 10²³ molecules

= 9.03 x 10²³ molecules

2 )

Convert 1.204x10²⁴ molecules to moles

6.02 x 10²³ molecules  = 1 mole

1.204x10²⁴ molecules = 1.204x10²⁴ / 6.02 x 10²³ moles

= 2 moles

3 ) Convert 1.5x10^20 molecules to moles

6.02 x 10²³ molecules  = 1 mole

1.5x10²⁰ molecules = 1.5x10²⁰ / 6.02 x 10²³ moles

= .25 x 10⁻³ moles

= 2.5 x 10⁻⁴ moles .

4 )

Convert 0.35 moles to molecules

1 moles = 6.02 x 10²³ molecules

.35 mole = 6.02 x .35 x 10²³ molecules

= 2.1 x 10²³ molecules.

5 )

Convert 15 moles H₂O to atoms

1 moles = 6.02 x 10²³ molecules

15 moles = 15 x 6.02 x 10²³ molecules

= 90.3 x 10²³ molecules of water

1 molecule of water has 3 atoms in total

90.3 x 10²³ molecules of water  = 90.3 x 3 x 10²³ atoms

= 270.9 x 10²³ atoms .

6 )

0.75 moles CaSO₄ to atoms

1 moles = 6.02 x 10²³ molecules

.75 moles = .75 x 6.02 x 10²³ molecules of CaSO₄

= 4.515 x 10²³ molecules of CaSO₄

1 molecule of CaSO₄ = 6 atoms

4.515 x 10²³ molecules of CaSO₄ = 6 x 4.515 x 10²³ atoms

= 27.09 x 10²³ atoms .

Answer:

Its on the picture.

Explanation:

Correct me if I am wrong :>

But hope it helps!

Can you please mark me as brainlest?

Its ok if you don't want to :>

Answer:

primary

Explanation:

Answer:

The pressure inside the bottle is 92.678 atm.

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

Replacing:

P* 0.500 L= 2.07 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * 273 K

Solving:

[tex]P=\frac{2.07 moles* 0.082 \frac{atm*L}{mol*K} * 273 K}{0.500 L}[/tex]

P= 92.678 atm

The pressure inside the bottle is 92.678 atm.

Answer:

Hydrogen peroxide is a colorless liquid at room temperature with a bitter taste. Small amounts of gaseous hydrogen peroxide occur naturally in the air. Hydrogen peroxide is unstable, decomposing readily to oxygen and water with release of heat.

Explanation:

mark brainliest

Answer:

Synthesis :)

Explanation:

Answer:

alright bud lets see hmm.... the answer is a. 90.5kpa

Explanation:

92.3 kPa - 1.82 kPa = 90.5 kPa

keep up your hope also corrected me if a am wrong in anyway! :)

Answer:

1656.12grams

Explanation:

To calculate the mass of a substance in a particle, we need to calculate the number of moles (n).

n = nA × 6.02 × 10^23

nA = 8.98 x 10^24 particles

number of moles = 8.98 x 10^24 ÷ 6.02 × 10^23

n = 8.98/6.02 × 10^ (24 - 23)

n = 1.492 × 10^1

n = 14.92moles of CaCl2

Molar Mass of CaCl2 where Ca = 40g/mol, Cl = 35.5g/mol

CaCl2 = 40 + 35.5(2)

= 40 + 71

= 111g/mol

Using mole = mass/molar mass

mass = molar mass × mole

mass = 111 × 14.92

mass = 1656.12grams.

Explanation:

What would be the new volume if the pressure on 600 mL is increased from 90 kPa to 150 kPa? V = Pu V₂ = 360 mL ~ 400 mL 6.

Answer:

true trust ong gotta be true fff

Answer:

Explanation:

3

Explanation:

The reaction expression is given as:

     Al(OH)₃  +   HNO₃   →    H₂O   +  Al(NO₃)₃  

To solve this problem, let us assign coefficient a,b,c and d to each specie;

          aAl(OH)₃  +   bHNO₃   →    cH₂O   +  dAl(NO₃)₃  

Conserving Al : a  = d

                  O:  3a + 3b  = c + 9d

                  H: 3a + b  = 2c

                  N: b  = 3d

let a = 1 , d  = 1, b  = 3 , c = 3

 Multiply through by 3;

a  = 1, b  = 3, c = 3 and d  = 1

  Al(OH)₃  +   3HNO₃   →    3H₂O   +  Al(NO₃)₃  

Answer:

noble gases from what i learnt

Answer:

Environment Secretary can refer to:

Cabinet Secretary for Rural Affairs and the Environment, Scotland

Secretary for the Environment, Transport and Works, Hong Kong

Secretary of State for Environment, Food and Rural Affairs, United Kingdom

Secretary of the Environment (Mexico)

Answer:

They can check if one of the bullets is gone if the gun was fully loaded or they can see if there is any particles of gun powder on the gun. I may be wrong.

Answer:

Explanation:

The coefficient is the number in front of a substance that indicates how many molecules or atoms are. For example, when we see 5He, it shows that there are 5 atoms of helium. When we see 5H₂O, it indicates that there are 5 molecules of water, each having 2 atoms of hydrogen and 1 atom of oxygen, so a total of 10 hydrogen atoms and 5 oxygen atoms.

Answer:

1 year- 1 mole

time in general- amount of matter

1 second- 1 atom/ particle

Answer:

1 Year => 1 Mole

Time in General => Amount of Matter

1 Second => 1 Atom/Particle

Explanation:

These pairs make the most sense.

Hope it helps!!!

The study of chemicals and bonds is called chemistry.

The correct answer is [tex]NH_4(OH)[/tex].

Ammonium hydroxide is the base that helps to increase the ph of the solution and helps to neutralize the acidic effect.

The uses of ammonium hydroxide are as follows:-

These are the use of ammonium hydroxide.

Hence, the correct answer is [tex]NH_4(OH)[/tex].

For more information, refer to the link:-

https://brainly.com/question/12985618

Answer:

Sorry I am not good at chemistry

Explanation:

The characteristics of the atoms and the periodic table allow to find the result for the number of protons, neutrons and electrons, the results in the table

The periodic table is a graphic representation where the chemical elements are placed by their atomic number, this table is organized in row and columns, where the elements of the same column have similar properties.

The period table indicates the atomic number, which is the number of protons, and the atomic mass, which is the sum of the protons plus the neutrons.

The atoms are neutral entities therefore the number of electrons must be equal to the number of protons.

It is asked to calculate the number of electrons, protons and neutrons of various chemical elements

Element Sodium,   symbol  Na

Atomic number (Z) 11

Atomic weights (M) 24

The number of protons is equal to the atomic number

      protons 11 protons

The number of neutrons is

      # neutrons = M - Z

      # neutrons = 24 -11

      # neutrons = 13 neutrons

The number of electrons is equal to the atomic number

      # electrons = 11

Element Yttrium,  symbol Y

Atomic Number 39

Atomic mass 89

Protons 39

Neutrons = 89-39 = 50

Electrons 39

Element Copper,  Symbol  Cu  

Atomic number 29

Atomic mass 64

protons 29

Neutrons = 64-29 = 35

Electrons 29

Element Technesium,  Symbol  Tc  

Atomic number 43

Atomic mass 98

protons 43

neutrons = 98 -43 = 55

electrons 43

Element Lead, Symbol  Pb  

Atomic Number 82

atomic mass 207

protons 82

neutrons = 207 -82 = 125

electrons 82

Element Thalium, Symbol  Ta  

Atomic Number 81

atomic mass 204

protons 81

neutrons = 204 -81 = 123

electrons 81

Element Hydrogen, Symbol  H  

Atomic number 1

Atomic mass 1

protons 1

neutrons 0

electrons 1

Element Carbon, Symbol C  

Atomic number 6

Atomic mass 12

Protons 6

neutrons = 12-6 = 6

electrons 6

Element Nitrogen, Symbol  N  

Atomic number 7

Atomic mass 14

protons 7

neutrons = 14-7 = 7

electrons 7

Element  Barium, Symbol  Ba  

atomic number 56

atomic mass 137

protons 56

neutrons = 137-56 = 81

electrons 56

with these results we complete the following table

Element   Symbol   Protons   Neutrons  Electrons

Sodium      Na              11              13                11

Yttrium          Y              39            50              39

Copper       Cu              29            35              29

Tecnetium  Te              43             55             43

Lead            Pb             82            125             82

Thallium      Ta             81              123             81

Hydrogen    H                1                0                 1

Carbon        C                6                6                6

Nitrogen      N                7                7                7

Barium       Ba             56               81              56

In conclusion using the characteristics of the atoms and the periodic table we can find the result for the number of protons, neutrons and electrons, the results in the table

Learn more here: https://brainly.com/question/11155928

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeiiiiiieeeeeemmmmmmmmiemeeeeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiimiiiimmmmmmmmmmmmmmmmmmmiimmiimiiiiiiiimiiiiiimmii

Explanation:

Answer:

It will condense.

Hope it helps,

Please mark me as the brainliest

Thank you

Answer:

424.6g

Explanation:

Density is a measure of a substance's mass over its volume.

d = m/v

we can rearrange this equation to solve for mass algebraically.

dv = m

We can then substitute the given values for our variables in the problem and solve for our answer.

22mL(19.3g/mL)= 424.6g