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Answer:

the last one

27% by 73%

Explanation:

12/44*100 for C

and

16/44*100 for O

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:. that contains the same number of entities as there are atoms in 12 g of carbon-12. ... the same as the mass of one mole of the compound in grams. • Skill 3-1 Calculate the ... Molar mass has units of grams per mole (g/mol). Concept 3. ... of moles to mass: •We can do the reverse with 1/M, and convert any mass in grams to.

Explanation:

The number of atoms in a mole of boron and carbon is required.

A mole of carbon and a mole of boron have the same number of atoms.

The unit of amount of substance is called mole.

[tex]1\ \text{mole}=6.022\times 10^{23}\ \text{atoms, molecules, ions, or electrons}[/tex]

So, 1 mole of any element, whether it be carbon or boron has the same number of atoms which is [tex]6.022\times 10^{23}[/tex].

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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

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.

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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%

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.

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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:

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:

A. It is made up of only one substance

Explanation:

Answer:

There are 30 atoms in total

Explanation:

There is 5 carbon, 5 of whatever A is and 4 oxygens but since the whole symbol has been multiplied by 5 there would be 20 oxygen

So 20 + 5 + 5 = 30 atoms

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:

6 N

Explanation:

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

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

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:

iron

Explanation:

A chemical formula is like a recipe for a chemical substance.

A chemical formula lists the elements that consist the compound as well as the number of atoms of each element in the compound's smallest unit, whether a molecule or a formula unit. Cognizing the elements' names and a few basic rules allows us to name simple compounds given a chemical formula.

Chemical formulas are classed into three types: empirical, molecular, and structural.

Empirical formulas depict the simplest whole-number ratio of atoms in a compound, whereas molecular formulas depict the number of each type of atom in a molecule and structural formulas depict how the atoms in a molecule are bonded to each other.

Thus, A chemical formula is like a recipe for a chemical substance.

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#SPJ6

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:

Answer: 227.5 grams

Explanation:

Answer:

227.5

Explanation:

Acellus

Answer:

cerebral palsy

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:D

Explanation:

Answer: D

Explanation: Edge 2020

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:

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:

Wavelength, distance between corresponding points of two consecutive waves. ... Wavelength is usually denoted by the Greek letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f.

Explanation:

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:Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest. So the asnwer is helium

Explanation:

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.

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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