Please help me ASAP!!!!!!
How many moles are present in 5.24 x 1023 molecules of CH4?

Answer:

naf+so2+nho3

Explanation:

beacause sodium is main solution in this equation

Answer:

e) P + O2 → P2O5

balanced equation

4P + 5O2 → 2P2O5

f) NaCl + F2 → NaF + Cl2

balanced equation

2NaCl + F2 → 2NaF + Cl2

g) K + MgBr2 → KBr + Mg

balanced equation

2K +MgBr2 → 2KBr +Mg

h) Mg + O2 → MgO

balanced equation

2Mg + O2 → 2MgO

i) Al + O2 → Al2O3

balanced equation

4Al + 3O2 → 2Al2O3

hope this helps you!

Answer:

Fluorine. This element has the greatest electronegativity value, so has the greatest attraction to electrons in a bond.

Explanation:

The atom of element with the strongest attraction for electrons in a chemical

bond from the options is Chlorine.

The element with the strongest attraction for electrons in a chemical bond is

the most electronegative element.

The electronegativity of an atom is the tendency of an atom to attract

bonding pairs of electrons.

Generally, electronegativity of an element increases across the period. The

electronegativity of an element also decreases down the group. The most

electronegative element is fluorine.

Halogen group are naturally electronegative.

Therefore, the most electronegative element in the option is chlorine and its

the element that has the strongest attraction for electrons in a chemical

bond.

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Answer:

Forensic scientists have used fingerprints in criminal investigations as a means of identification for centuries. Fingerprint identification is one of the most important criminal investigation tools due to two features: their persistence and their uniqueness. A person's fingerprints do not change over time.

Explanation:

Answer:

See explanation

Explanation:

Substitution implies that one thing is repalced by the other.

Substitution of one ion by another largely depends on the sizes of the ions in question.

The ionic radius of Mn3+ is about 0.65 Angstroms while that of In3+ is about 0.94 Angstroms. On the other hand, the ionic radius of Y3+ is about 1.032 Angstroms.

It is clear that the sizes of Mn3+ and In3+ are closer to each other hence Mn3+ can substitute for In3+ easily than Y3+ in a lattice site.

The larger size of Y3+ explains why it is not easily replaced by Mn3+.

Answer:

8.757 x 10^23 molecules

Explanation:

Use Avogadro's number of  6.022 × 10 ^23  molecules per mole.

64g CO2/44.01 g/mol = 1.454 moles of CO2

1.454 x  6.022 × 10 ^23 =

8.757 x 10^23 molecules

Answer:

its d

Explanation:

Model D shows a neutral atom of carbon as it has 6 protons in the nucleus and 6 electrons in it's orbits.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

i dont XD

Explanation:

Answer:

no

Explanation:

Answer:

just click any of the buttons

Answer:

23535

Explanation:

ugggguguygiugiugugiyuuigiuyiugy

Answer: a bench made of composite plastic

Explanation:

The chemical weathering can be defined as the process in which a chemical causes the degradation and decomposition of the rocks into small particles. The iron rods, feldspar, and marble will weather considerably with a greater danger as the have a strong solid body. But plastic when exposed to a chemical agent usually melts and thus there is least or no danger of chemical weathering of plastic.

Answer:

11.49g/cm³

The crown is not gold

Explanation:

Given parameters:

Mass of crown = 505431mg  = 505.431g

Volume of crown  = 44mL  = 44cm³

Unknown:

density of the crown = ?

Solution:

Density is the mass per unit volume of a substance.

  Density  = [tex]\frac{mass}{volume}[/tex]

insert the parameters and solve;

  Density  = [tex]\frac{505.431g}{44 }[/tex]  = 11.49g/cm³

The density of gold is 19.3g/cm³.

The crown is not gold

Answer:

6.02×10 to be tge power 23

Answer:

The water will be boiling

Explanation:

When water reaches 100⁰C the water will be boiling.

Answer:

The climate was very hot in earlier time periods and became colder in later time periods.

Explanation:

I believe it is B.

The earlier days in the earth was of very cold and it is believed to be an ice planet where animals adapted to cold climate was more. Hence, option 1 is correct.

The long time pattern of weather in an area is called climate. Climate changes with time and region to region. The different climates in earth is influenced by sun.

Different regions on earth experience different climate due to the varying distance from sun, and other factors such as air quality, presence of mountains, sea, etc.

Earlier days of earth was very much cold and it was known as ice age. This climate was because of the reduced temperature . Thus animals adapted to cold climate was there. Later earth changed to greenhouse period where the heat gradually increased and set into current state.

The fossils of earlier animals was deposited in the lower layer and that of continued age is upper layer. Hence, option 1 is correct. Where the earlier life was of cold climate.

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Answer:Thicker wires have a larger cross-section that increases the surface area with which electrons can flow unimpeded.

Explanation:I really do not know

Answer:

The answer is burning of wood

Explanation:

just took the quiz

Answer:

When light falls on a material, the energy in its photons can affect the atoms in the material. In some materials, such as metal, the atoms absorb some of the photons so light does not pass through them. In other materials, such as glass, the atoms cannot absorb the photons and light passes through them.

Explanation:

Hope this is good

Answer:

A

Explanation:

Density/Formula

\rho ={\frac {m}{V}}

\rho = density

m = mass

V = volume

Answer:

(σ2s)2(σ2s*)2(σ2p)2(π2p)4(π2p*)2(π2p*)1

Explanation:

In writing molecular orbital configuration, the number of valence electrons involved in the molecule are all written into  various molecular orbitals in accordance with the Aufbau principle.

O2^- contains 17 electrons. Its molecular orbital configuration is KK(σ2s)2(σ2s*)2(σ2p)2(π2p)4(π2p*)2(π2p*)1. Recall that the inner (σ1s)2 and (σ1s*)2 is designated as KK. This inner shell does not take part in bonding. The bond order in O2^-  is 1.5.

The ground state electron configuration of O2- is Choice C: (σ2s)2(σ2s*)2(σ2p)2(π2p)3(π2p*)2(π2p*)2

Discussion:

The molecular orbital configuration is dependent on the number of electrons involved in the molecule.

These are all written into various molecular orbitals as described in the Aufbau principle of electron configuration.

Since O2 contains 16 electrons, when it gains an electron to become O2-;

O2^- contains 17 electrons.

Its molecular orbital configuration is;

It is noteworthy to remember that the inner (σ1s)2 and (σ1s*)2 are represented as KK. This inner shell does not take part in bonding.

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Answer:

1

Explanation:

Answer:

1. is B 2. is C or B

Explanation:

Answer:

weathered rock and deceomposed material

Explanation:

Answer:

Hydrogen ions

Explanation:

Answer:

concentration of hydrogen ion

Explanation:

Answer: i can understand it sorry

Explanation: