PLEASE HELP WITH THIS ASAP

Explanation:

The formula of nitrogen gas is given as;

          N₂

  Given volume of the gas = 120cm³

Now,

 We need to find the number of molecules and the mass of this compound

Solution:

At STP;

     1 mole of gas occupies a volume of 1dm³ ;

          1000cm³  = 1dm³

          120cm³  gives 0.12dm³;

Now;

              1dm ³ of gas contains 1 mole of substance at STP

             0.12dm³ will contain 0.12mole of nitrogen gas at STP

Mass of N₂ gas = number of moles x molar mass of N₂

    Molar mass of N₂ = 2(14)  = 28g/mol

    Mass of N₂  = 0.12 x 28  = 3.36g

1 mole of a substance contains 6.02 x 10²³ molecules

0.12 mole of N₂ will contain 0.12 x 6.02 x 10²³  = 7.22 x 10²²molecules

C, 0.746 mol Ag.

1 mol Ag = 6.022 x 1023 atoms of Ag -> 4.49 x 1023 atoms of Ag x 1mol Ag/6.022 x 1023 atoms -> 0.746 mol Ag

The moles of Ag that contain 4.49  [tex]\rm \times\;10^2^3[/tex] atoms have been 0.745 moles.

The number of atoms in a mole can be given by the Avagadro number. The Avagadro number has been equal to the number of atoms in a mole of compounds. The Avagadro number has been constant with a value of 6.023 [tex]\rm \times\;10^2^3[/tex].  

6.023 [tex]\rm \times\;10^2^3[/tex] atoms = 1 mole

So, for the given 4.49  [tex]\rm \times\;10^2^3[/tex] atoms:

4.49  [tex]\rm \times\;10^2^3[/tex] atoms = [tex]\rm \dfrac{1}{6.023\;\times\;10^2^3}\;\times\;4.49\;\times\;10^2^3[/tex] moles

4.49  [tex]\rm \times\;10^2^3[/tex] atoms = 0.745 moles.

The moles of Ag that contain 4.49  [tex]\rm \times\;10^2^3[/tex] atoms have been 0.745 moles.

For more information about the moles of an atom, refer to the link:

https://brainly.com/question/4783755

The answer option which is not a benefit of using biofuels instead of fossil fuels is: D. Fossil fuels may be used in the production of biofuels.

Renewable energy is also referred to as clean energy and it refers to a type of energy that is generated through natural sources or technology-based processes that are replenished constantly.

Some examples of these natural sources are:

Non-renewable energy refers to a type of energy that is generated through artificial sources and as such cannot be replenished such as coal, natural gas, fossil fuels, petroleum.

In conclusion, fossil fuels cannot be used in the production of biofuels.

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51.41%

Percentage Composition from Formulas

A more complex example is sucrose (table sugar), which is 42.11% carbon, 6.48% hydrogen, and 51.41% oxygen by mass.

Or

53.3 %

Thus the % composition of glucose by mass is carbon 40.0 % oxygen 53.3 % hydrogen 6.7 % In this way, the % composition by mass of any compound can be calculated provided that its formula is known.

...

What is the percentage composition of sugar?

Element Symbol Mass Percent

Hydrogen H 6.714%

Carbon C 40.001%

Oxygen O 53.285%

Answer:

Ammonia has 4 regions of electron density around the central nitrogen atom (3 bonds and one lone pair). These are arranged in a tetrahedral shape. The resulting molecular shape is trigonal pyramidal with H-N-H angles of 106.7°.

Explanation:

Answer:

by using a lemon as a circuit and two positive and negative wires

Answer:

iron sulfate

Explanation:

Electrostatic attraction as bonds between ions is characteristic of the electrovalent bond or the ionic bond

In this type of bond, there is electron transfer from one atom to another. The atom that looses electrons become positively charged while the atom that gains electrons becomes negatively charged.

In iron sulfate, there is electrostatic attraction between Fe II ions and sulphate ions, making iron sulfate an ionic compound.

Answer:

the last one

27% by 73%

Explanation:

12/44*100 for C

and

16/44*100 for O

Answer:

Outermost energy shell

Valence electrons

are involved

Unreactive

Explanation:

Electron-dot notation shows only the electrons in the outermost energy shell of  an atom. These electrons are called valence electrons and are involved in  chemical reactions. Elements with a full outer energy shell are typically very reactive.

Carbon is very important to plants and they obtain the majority of it from the air in the form of carbon dioxide.

In conclusion, carbon is very important to plants as they both use it to get food and to maintain their shape owing to their internal structure being made from carbon.

Find out more about carbon and plants at https://brainly.com/question/19083306.

Answer:

The threshold frequency for a photosensitive metal is 3.3 x 1014 Hz. If light of frequency 8.2 x 1014 Hz is incident on this metal,

Explanation:8.2x1014Hz

Answer:

No

Explanation:

The air is really a mixture of many different gases, and each gas has its own properties. The composition of air is not constant. It can vary from time to time and place to place

Answer:D

Explanation:

Answer: D

Explanation: Edge 2020

Answer:

6 N

Explanation:

Force (Newtons) = mass (kg) times acceleration (m/s2)

2 kg x 3m/s2 = 6 kg/m/s2

Answer:

I AM SLEEPY TOO WILL HELP TOMMOROW!

Explanation:

Answer:

A

Explanation:

It is the energy molecule.

Answer:

There are three measures of retrieval and forgetting: recall, a measure in which an individual brings learned information back to conscious awareness; recognition, a measure in which a person identifies previously learned information; and relearning, a measure in which a person is asked to learn information a second time.

Explanation:

Answer:

Responses may vary but should include some or all of the following information:

There are three measures of retrieval and forgetting: recall, a measure in which an individual brings learned information back to conscious awareness; recognition, a measure in which a person identifies previously learned information; and relearning, a measure in which a person is asked to learn information a second time.

Explanation:

edge

Answer:The Strong Nuclear Force (also referred to as the strong force) is one of the four basic forces in nature (the others being gravity, the electromagnetic force, and the weak nuclear force). As its name implies, it is the strongest of the four. However, it also has the shortest range, meaning that particles must be extremely close before its effects are felt. Its main job is to hold together the subatomic particles of the nucleus (protons, which carry a positive charge, and neutrons, which carry no charge. These particles are collectively called nucleons). As most people learn in their science education, like charges repel (+ +, or - -), and unlike charges attract (+ -).Hope this helps

Explanation:

Answer:

is there an answier choice u have to choose from or no

Explanation:

Answer:

Hair color

Eye color

Birth weight

Explanation:

answer below

Explanation:

Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. warm fronts move more slowly than cold fronts because it is more difficult for the warm air to push the cold, dense air across the Earth's surface.

hope this helps! have a great day!

Answer:

Explanation:

2 C6H12O2 + 6 O2 -

C = 12

H = 24

O = 16

es un cambio químico

Explanation:

Porque es un cambio irreversible y cambia su naturaleza.  

Answer:

Chemical

Explanation:

It includes the breakdown of the food particles by the organisms. It experiences acidic response and the breakdown of food into easier structure.

Answer:

Creep is the imperceptibly slow, steady, downward movement of slope-forming soil or rock. Movement is caused by shear stress sufficient to produce permanent deformation, but too small to produce shear failure. ... Continuous, where shear stress continuously exceeds the strength of the material.

Explanation:

Explanation:

cutting down trees the effect is that there are not a lot of trees to help with carbon dioxide

Answer:

It is caused by increased concentrations of greenhouse gases in the atmosphere

Answer:

The electron cloud model describes electrons as the most likely found around the nucleus of an atom. It is also found that electrons could seemingly be everywhere at one time.

Explanation:

Hope this helped

Answer:

Ionic compounds are compounds whereas metals are elements. Ionic compounds are electrolytes whereas metals are conductors. Ionic compounds are brittle whereas metals are malleable and ductile. ... Most ionic compounds will dissolve in polar solvents like water whereas metals will either be insoluble or react with water.

Answer:

diffusion is the movement of gases from a higher concentration area to a lower concentration area

osmosis is the movement of water molecules from a higher concentration area to a lower concentration area