please help this will help my grade a lot

Answer:

3 I think

Explanation:

this could be because I noticed the 3 subscript by the H which is the letter for hydrogen but I'm not 100% sure

if I'm correct, then ur welcome <3 it's always nice to be nice UwU

here's Jay Jay for u cuz I love her ^^

Answer: B

Explanation:

Answer:

increase

Explanation:

if the pressure goes down then the gas will spread out more, meaning the volume will increase

Answer:

D. number of neutrons

Explanation:

Isotopes of the same element must have the same number of neutrons. Neutrons of an atom are the uncharged particles within the nucleus.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but having different mass number due to the differences in the number of neutrons in their various nuclei.

Therefore, isotopes differs based on the number of neutrons they contain.

Answer:

D. number of neutrons

Explanation:

Two isotopes of the same element have the same number of protons in the nucleus, but differ in the number of neutrons. The nucleon number is equal to the total number of protons and neutrons in the nucleus. ... The atomic mass number A is equal to the total number of protons and neutrons.

The number of molecules of Nitrogen dioxide : = 4.816 x 10²⁴

Given

4 moles of Oxygen(O2)

Required

The number of molecules

Solution

Reaction

2NO + O2 ⇒ 2NO2

From the equation, mol NO2 :

= 2/1 x mol O2

= 2/1 x 4 moles

= 8 moles

The number of molecules :

= 8 x 6.02 x 10²³

= 4.816 x 10²⁴

Answer:

Go to your periodic table and look for each element. Find the mass for Aluminum, Nitrogen, Oxygen, and Hydrogen.

After you find those, for each compound you must add them together and find the least amount of sig figs after the decimal point.

For the first compound, Al(NO3)3, you will have a total of

1 Aluminum atom

3 Nitrogen atoms

9 Oxygen atoms

Aluminum has 26.982 g/mol

Nitrogen has 14.007 g/mol

Oxygen has 15.999 g/mol

Now multiply those numbers by the amount of atoms of each element.

(1)26.982 g/mol = 26.982 g/mol

(3)14.007 g/mol = 42.021 g/mol

(9)15.999 g/mol = 143.991 g/mol

now add all of those numbers together, and you see that their least significant figure after the decimal is 3, so round to 3 digits after the decimal point.

26.983 + 42.021 + 143.991 = 212.994

now do the same for the other compound

to start you off.. you have

6 Hydrogen atoms

3 Oxygen atoms

Hydrogen has 1.009 g/mol

Oxygen has 15.999 g/mol

the least significant figure after the decimal point is 3, so round you 3 digits after the decimal point.

after you finish getting your totals, you. until them and find the greatest sig fig over all. comment on this if you need further instruction :)

Explanation:

B. filter and remove liquid and solid waste

Answer: Energy, or the ability to do work, can exist in many different forms. ... The stage lights use electrical energy and give off both light energy and thermal energy, commonly called heat.

Explanation:

Hope this help

Answer:

-6.51

Explanation:

Multiply 1.86 x 2 x 1.74 and then you get your answer.

Answer:

As the molality increases by 1 m, there is a corresponding decrease of 1.86°C in the solution’s freezing point.

Explanation:

Anser on EDge

Answer:

9.5 m

Explanation:

First, divide 4.75 m by the 0.50 l

4.75/0.50

This leaves you with 9.5 m

Answer:

x^2 - a^2

Explanation:

Heat energy

I thing it's that? ok will hope you have a good day :)

Answer:

D. The cup reflects yellow light but absorbs all other colors of light.

Explanation:

The cup in the shop appears yellow because the cup reflects yellow light but absorbs all colors of light.

Due to the materials the cup is made of, it is able to specifically reflect yellow and absorb other radiation types.

The color we see are products of the part of visible radiations they reflect.

The cup in this instance reflects yellow and absorbs other color.

Answer:

It is diffusion

Explanation:

Diffusion occurs when particles move from relatively high concentration to relatively low

Answer:

it is diffusion

Explanation:

smoke rises from one corner of the room and spreads to the rest of the room, resulting in diffusion

Answer:

6

Explanation:

Answer:

What are the two animals?

Explanation:

Answer:

No

Explanation:

There are no interactive forces (i.e., attraction or repulsion) between the particles of a gas.

The average kinetic energy of gas particles is proportional to the absolute temperature of the gas, and all gases at the same temperature have the same average kinetic energy.

Answer:

bacterial cell plant cells dont have a tail

Explanation:

The type of cell shown in the diagram is the bacterial cell as plant cell do not have tails while bacteria have tail.

Bacteria are prokaryotic unicellular organisms. They have a relatively simple cell structure compared to eukaryotic cells. They also do not possess any membrane-bound organelles such as a nucleus. However, do they possess genetic material (DNA or RNA) in the intracellular space called the nucleoid.

Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes. Prokaryotes are the dominant living creatures on Earth, having been present for perhaps three-quarters of Earth history and having adapted to almost all available ecological habitats.

Learn more about bacteria,here:

https://brainly.com/question/15490180

#SPJ4

The dog would not  be in the part of first trophic level of an energy pyramid.

Energy pyramid is defined as a model that show the flow of energy from one tropic or feeding level to next tropic or feeding level in an ecosystem.

There are basically three energy pyramid.

Trophic level is defined as the source based on their nutrition or food, organisms occupy a specific place in a food chain.

First trophic level contains only green plants and producers. Their plants and product where consumed by second level of organisms.

Thus, the dog would not  be in the part of first trophic level of an energy pyramid.

To learn more about energy pyramid, refer to the link below:

https://brainly.com/question/2837831

#SPJ5

Answer:

0.5 mole of a SO2 contains 3.01 into 10 ^23 molecules of So2.

Explanation:

Have a great day <3

Answer:

1) Condensation

2) Temperature

3) Evaporation

4) Kinetic Energy

5) Sublimation

6) Thermal Energy

Answer:

1.5moles of S;

Explanation:

The reaction expression is given as:

            S +  O₂   →   SO₂

Number of moles of SO₂  = 1.5moles

From the balanced reaction expression:

              1 mole of SO₂ will be produced from 1 mole of S;

  So;      1.5moles of SO₂  will produce 1.5moles of S;

The moles of S₂ needed to produce 1.50 moles of SO₂ gas is 1.5 mol.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

The reaction is

S +  O₂   →   SO₂

The number of moles of SO₂ is 1.50 mol

1 mole of S produce 1 mole of SO₂

Then, 1.5 mole of S will produce 1.5 SO₂

Thus, the moles are 1.5.

Learn more about moles

https://brainly.com/question/20486415

Answer:

I think it's alkali metals

Answer:

[tex]its \: fluorine \: and \: it \: belongs \: to \ : \\ 17th \: family \: noble \: gases[/tex]

Answer:

Cell theory states that cell living organisms are composed of at least one cell, which are the basic unit of life. Cells are always produced from other living cells, and cannot spontaneously generate

AnswerIm telling your teacher "Ms.Byrd" your in 8th grade and go to berry middle?

Explanation:

Answer:

Calculate he number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4.

Explanation: