What is the mass of 1.6 mol of aluminum atom?

Potassium chloride is an electrolyte, fructose and isopropyl alcohol are nonelectrolytes, and magnesium hydroxide is an electrolyte.

1. Potassium chloride is an ionic compound and when it dissolves in water, its ions separate, making it an electrolyte.

2. Fructose is a molecular compound, and when it dissolves in water, it does not produce ions. Therefore, it is a nonelectrolyte.

3. Isopropyl alcohol is an organic molecule and its bonding is all covalent. When isopropyl alcohol dissolves in water, it separates into individual molecules but not ions. Thus, it is a nonelectrolyte.

4. Magnesium hydroxide is an ionic compound, so when it dissolves, it dissociates into ions, making it an electrolyte.

Answer:

D. It may be similar to Earth's early conditions.

Explanation:

Titan is one of the many satellites orbiting planet saturn. This satellite is very interesting as it shows a lot of similarities with the conditions at play when the early earth formed.

The early earth atmosphere was made up of reduced gases lacking in oxygen. Titan's atmosphere also share this similarity. It's atmosphere is predominantly made up of nitrogen, methane and carbon dioxide.

Titan also has a rocky surface just like earth and it has an atmospheric cover.

Answer:

it may be similar to earths early conditions

Explanation:

The oxidizing agent in the reaction Cr2O72- (aq) + NO2 (aq) – Cr3+ (aq) + NO3 (aq) is Cr2O72-, as it is reduced, meaning it accepts electrons, going from a chromium oxidation state of +6 to +3.

In a redox reaction, the oxidizing agent is the substance that is reduced, meaning it gains electrons. In the unbalanced reaction: Cr2O72- (aq) + NO2 (aq) – Cr3+ (aq) + NO3(aq), the Cr2O72- ions are reduced to Cr3+ ions.

This is determined through the observation of the oxidation states of the substances before and after the reaction. The oxidation state of chromium in Cr2O72- is +6, while it is +3 in Cr3+. This reduction in oxidation state indicates that Cr2O72- accepted electrons, meaning it is the oxidizing agent in this reaction.

https://brainly.com/question/10547418

#SPJ3

First of all, as you seen the gases are noble which means that will not react with each other and in this case each gas create individual pressure.  

P[tex]_{T}[/tex]= total pressure  

P[tex]_{Ne}[/tex] = pressure of neon  

P[tex]_{Ar}[/tex] = pressure of argon  

P[tex]_{He}[/tex] = pressure of helium {which is required}

P[tex]_{T}[/tex] = P[tex]_{Ne}[/tex] + P[tex]_{Ar}[/tex] + P[tex]_{He}[/tex]    

1.25 = 0.68 + 0.35 +  P[tex]_{He}[/tex]

P[tex]_{He}[/tex]   = 1.25  - [0.68 + 0.35] = 0.22 atm

Hello There!

The science of matter is called chemistry. Chemistry is the science of matter and its changes that occur. Everything in our universe is made up of matter and it has to have mass and take up space to be considered this.

Answer:

There are two ideas about evolution.

1.) Religious

2.) Scientific

In religion, people believe that we were created through god.

In the scientific, people believe that we were created from apes and that throughout the time we became humans.

Explanation:

Naturalists began to focus on the variability of species; the emergence of paleontology with the concept of extinction further undermined static views of nature. In the early 19th century Jean-Baptiste Lamarck (1744–1829) proposed his theory of the transmutation of species, the first fully formed theory of evolution.

In classical Latin, though, evolution had first denoted the unrolling of a scroll, and by the early 17th century, the English word evolution was often applied to 'the process of unrolling, opening out, or revealing'. It is this aspect of its application which may have been behind Darwin's reluctance to use the term.

Answer:

It determines how biological molecules recognize and respond to one another with specificity.

Explanation:

A molecule has a characteristic size and shape. The precise shape of a molecule is usually very important to its function in the living cell. Molecular shape is crucial in biology because it determines how biological molecules recognize and respond to one another with specificity.

Answer:

the structure of a molecule affects how it interacts with other molecules

Explanation:

I took the test

Answer:A double convalescent bond is where two pairs of electrons are shared between the atoms rather than just one pair. Two oxygen atoms can both achieve stable structures by sharing two pairs of electrons as in the diagram.

Explanation:

Percent yield is the ratio between actual and theoretical yield multiplied by 100%. The higher the actual yield the higher is the percent yield. In the percent yield there is always a limiting reagent that creates the difference between what is obtained and what is calculated. Percent yield can never exceed 100% if that happens it means that there was some error in the theoretical yield calculation.

Answer:

R means there's a number of carbon in the chain.

Explanation:

For example RCOOH means that after x number of carbon, the chain ends with COOH.

Answer:

The correct answer is "a radical formed by carbons".

Explanation:

Carboxylic acids are a group of compounds characterized by a functional group called the carboxyl group. In a structural formula of a carboxylic acid, such as RCOOH, R symbolizes the existence of a radical formed by a certain amount of carbons attached to the functional group called the carboxyl group (COOH).

Have a nice day!

Final answer:

To find how many moles of gas occupy a given volume under certain conditions, we use the ideal gas law PV = nRT with proper unit conversions. Upon calculation with the conditions provided (520 mL at 400 torr and 340 K), the result is approximately 0.0098 moles, which is option B.

Explanation:

To determine how many moles of gas occupy 520 mL at a pressure of 400 torr and a temperature of 340 K, we use the ideal gas law equation PV = nRT. To use this equation, we must first convert the volume of the gas from mL to L (since R, the gas constant, is given in liters), and the pressure from torr to atm because R is also defined with pressure in atmosphere. 1 atm = 760 torr, so 400 torr is equal to 400 torr / 760 torr/atm = 0.5263 atm. The volume is 520 mL, which is 0.520 L. The value of R (the gas constant) is 0.0821 L atm / (K mol).

Now we can plug values into the ideal gas law:
PV = nRT
(0.5263 atm) × (0.520 L) = n × (0.0821 L atm / (K mol)) × (340 K)

After calculation, we find:
(0.5263 atm × 0.520 L) / (0.0821 L atm / (K mol) × 340 K) = n

n ≈ 0.0098 moles

Therefore, the answer is (B) 0.0098 moles.

Answer:

C. Decreasing the temperature of the system.

Explanation:

Decreasing the temperature of the system increases the chance of a reaction when two  molecules collide.

The chance of a reaction when two molecules collide is increased by 'Increasing the concentration of the molecules', while the other options listed ('increasing the activation energy of the reaction', 'decreasing the temperature of the system', 'slowing down the speed of the molecules') actually decrease the chance of a reaction.

The chance of a reaction when two molecules collide can be increased via one or more of several methods, each corresponding to different options presented in your question. Option A. Increasing the concentration of the molecules, leads to more frequent collisions and thus a higher chance of reaction. Option B. Increasing the activation energy of the reaction, instead, makes reactions less likely because more energy is needed for the reaction to occur. Option C. Decreasing the temperature of the system also reduces the chance of reaction as it slows down molecular motion and thus collisions. Option D. Slowing down the speed of the molecules also decreases the chance of reactions as it reduces the frequency of collisions. Based on these considerations, only Option A. Increasing the concentration of the molecules increases the chance of a reaction when two molecules collide.

https://brainly.com/question/34137415

#SPJ6

Answer:

Along the upper right side

Answer:

1.4

Explanation:

35 times .5 =25 times C. you have to get C by itself so you would have to do 35 times .5 and you get 17.5, than ÷ it by 25 and you get 1.4

Answer:

b. 0.70 M HCl is the Answer

Explanation:

Molarity (M),  Molality (m), Normality (N),  Mass %,  Parts per million(ppm), billion(ppb), thousands(ppt)  are some of the terms we use to represent the concentration of the solution that is to represent the amount of solute present in a solvent.

The Balanced Chemical equation is :

[tex]NaOH + HCl > NaCl + H_2 O[/tex]

Molarity is moles of solute present in 1L of the solution. The formula to find Molarity is

[tex]Molarity  = \frac {(moles solute)}{(volume of solution in L)}[/tex] and its unit is mol/L

Rearranging the formula

We get                          

Moles = Molarity × Volume

Plugging in the values  

[tex]moles of NaOH=0.50M\times35mL (M=mol/L)[/tex]

[tex]=0.50 mol/L \times 0.035L=0.0175 moles NaOH[/tex]

Mole ratio of NaOH: HCl is 1:1  

So moles of NaOH = moles of HCl  = 0.0175moles

So,

[tex]Molarity  = \frac {(moles solute)}{(volume of solution in L)}[/tex]

[tex]=\frac {0.0175mol}{25mL}\\\\=\frac {0.0175mol}{0.025L}\\\\=0.70M[/tex]

(Answer)

Answer:

Knowing this, researchers from the University of Southern Denmark decided to investigate the size of these hypothetical hidden particles. According to the team, dark matter could weigh more than 10 billion billion (10^9) times more than a proton.

Explanation:

If this is true, a single dark matter particle could weigh about 1 microgram, which is about one-third the mass of a human cell (a typical human cell weighs about 3.5 micrograms), and right under the threshold for a particle to become a black hole.

Answer:

D.  A syringe pulls in air as the plunger is pulled back.

Explanation:

As per Charles’s law  

At constant pressure for a given amount of a gas,

Volume is directly proportional to its temperature.

Directly proportional means when one increases the other one too will increase. That is when volume increases temperature too will increase. When volume decreases, temperature too will show a decrease.

Option A tells us that the volume of the hot air balloon increase due to the rise(increase) in temperature as the balloon is heated

Thus the expression is [tex]V \propto T[/tex]

[tex]\frac {V}{T} = k[/tex] where k is a constant  

When there is a change in the volume and temperature the expression will be

[tex]\frac {V_1}{T_1} = \frac {V_2}{T_2}[/tex]

where [tex]V_1[/tex] and [tex]T_1[/tex] are the initial volume and initial temperature and [tex]V_2[/tex] and [tex]T_2[/tex] are the final volume and temperature.

Final answer:

The best example of Charles's Law is the increase in the volume of a hot air balloon as the air inside it is heated. This demonstrates the direct proportionality between the volume of a gas and its temperature when pressure and the amount of gas are constant. So the correct option is A.

Explanation:

The question pertains to Charles's Law, which states that the volume of a gas is directly proportional to its temperature (in kelvins), provided the pressure and the amount of gas remain constant. The best demonstration of Charles's Law among the given options is 'The volume of a hot air balloon increases as the air inside it is heated.' This is because as the air inside the balloon is heated, its molecules increase in kinetic energy, which leads to an increase in volume, causing the balloon to expand.

The mass of 6.80 moles of H₂O, given H= 1.008 amu and O = 15.999 amu, is 122.502 grams. This was determined by first calculating the molar mass of H₂O and then using it to find the total mass. The molar mass of H₂O is 18.015 g/mol, calculated as 2 × 1.008 g/mol + 1 × 15.999 g/mol.

Step-by-Step Explanation

Calculate the molar mass of H₂O:

The molar mass of H₂O is calculated by adding the masses of its constituent atoms:

Molar mass of H₂O = 2(H) + 1(O)

Given H = 1.008 amu and O = 15.999 amu,

Molar mass of H₂O = 2 × 1.008 g/mol + 15.999 g/mol = 18.015 g/mol

Use the molar mass to find the mass of water:

We know that:

Number of moles (n) = 6.80 moles

Molar mass (M) = 18.015 g/mol

Mass (m) = n × M

Therefore, Mass = 6.80 moles × 18.015 g/mol = 122.502 g

The mass of 6.80 moles of H₂O is 122.502 grams.

Answer:

1.25 g/L.

0.0214 mol/L.

Explanation:

Concentration in g/L = 5/4

= 1.25 g/L (answer).

As for  mol / L we need to know the molar mass of salt.

It is 22.99 + 35.45 = 58.44.

So in mol/L it is  1.25 / 58.44

= 0.0214 mol/L.

Answer:

It is MgCl₂ because the total positive charge on Mg is two

Explanation:

The bond between the atoms that makes up the formula unit of the compound is an ionic bond. This bond involves the transfer of electrons between atoms.

Mg is in the second group on the period on the periodic table. It has two valence electrons and would readily lose it to have a stable atomic configuration like those of noble gases. This leaves magnesium with a net positive charge of 2. Each chlorine atom gains one electron to achieve their own octet.

The formula unit of a substance composed of magnesium (Mg) and chlorine (Cl) is [tex]MgCl_2.[/tex] Therefore, the correct option are C and D.

This is due to the fact that while chlorine has a negative charge of -1, magnesium has a positive charge of +2. Two chloride ions combine with one magnesium ion to equalize the charges and provide electrical neutrality.

The two chlorine ions combine to provide a total negative charge of -2 because each chlorine ion adds a charge of -1. The negative charge of the chlorine ions is balanced by the +2 charge of the magnesium ions. As a result, the molecule formed by the combination of one magnesium ion and two chlorine ions is represented by the formula unit [tex]MgCl_2[/tex].

Therefore, the correct option are C and D.

Learn more about formula unit, here:

https://brainly.com/question/11745334

#SPJ6

Answer:

Explanation:acid etching  

etching

the cutting of a hard surface such as metal or glass by a corrosive chemical, usually an acid, in order to create a design.

etching  - etching of dental enamel with an acid in order to roughen the surface, increase retention of resin sealant, and promote mechanical retention.

acid etching

microscopic roughening of dental enamel with an acid (usually phosphoric acid) to remove the smear layer and open enamel tubules, increase retention of resin sealant, and promote mechanical retention.

acid etching Dentistry

The application of a weak acid—e.g., 30% phosphoric acid—to the surface of enamel to roughen the surface of a tooth before bonding a resin or veneer; acid etching increases mechanical retention, cleans the enamel and improves the wetting of resins. See Cosmetic dentistry.

Acid etch typically involves dilute hydrofluoric acid or ammonium bifluoride for glass etching. Buffer mixtures, like acetic acid-acetate ion, need balanced components for effectiveness.

The usual composition of acid etch typically involves using potent acids that are capable of reacting with glass or metal surfaces to create art or clean materials. For glass etching, dilute hydrofluoric acid has been traditionally used, which slowly dissolves the silica to create intricate designs. In some cases, compounds like ammonium bifluoride may also be employed for etching purposes. While creating buffer mixtures for various chemical processes, it is essential to maintain close concentrations of the buffer components to ensure effectiveness. For instance, with an acetic acid-acetate ion buffer, a significant pH change is noted when the concentration of acetic acid drops to about 10% of the acetate ion concentration. The selection of acids and buffers depends on the specific application and desired pH level.

Answer:

A reaction rate is a measure of how fast a reactant disappears or a product forms during a reaction.

Explanation:

It is usually defined as the change in concentration per unit time:

Δ(concentration)/Δt

The units are (moles per litre) per second.

In symbols, the units are mol/(L·s) or mol·L^-1 s^-1.

Answer:

A. True

Explanation:

Objects that are said to be undergoing free fall, are not encountering a significant force of air resistance; they are falling under the sole influence of gravity. Under such conditions, all objects will fall with the same rate of acceleration, regardless of their mass

Answer:

true

Explanation:

weight and shape does not matte in a perfect world unfortunately they are effected in our world where there is friction and air resistance

Answer:

N₂+3H₂ ⇄2NH₃ is a thermochemical reaction whereas A+BC⇄AB is not.

A+BC⇄AB is a reaction of pure a element with a compound while N₂+3H₂ ⇄2NH₃ is a reaction between two pure elements.

Explanation:

Let A+BC⇄AB be equation i and N₂+3H₂ ⇄2NH₃ be equation ii.

The two reactions differ in that ii is a thermo-chemical reaction whereas i is not. This is because energy is included in reaction ii but not included in reaction i.

Also i is a reaction of pure a element with a compound while ii is a reaction between two pure elements. The compound is BC while the pure element is A.

Answer:

A is a single displacement reaction; B is a combination (synthesis) reaction.

Explanation:

The first reaction

A + BC → AB + C

This is a single displacement reaction, in which an element A displaces another element C from its compound BC.

The second reaction

N2 + 3H2 → 2NH3

The coefficients don't matter in determining the type of reaction, so we can rewrite this equation as

A + B → AB

It then becomes more obvious that this is a combination (synthesis) reaction, in which two elements combine to form a compound.

Answer:

Jupiter

Explanation:

The Galilean moons of Jupiter are Io, Europa, Ganymede, and Callisto.

Answer:

Jupiter

Explanation:

The Galilean moons are the four largest moons of Jupiter, first found by Galileo Galilei in either December of 1609 or January of 1610. He recognized them are satellites in March of 1610.

Answer:

a. 2500 ml of water is needed

Explanation:

V1C1=V2C2

(500)(5)=(1)V2

2500/1=V2

2500 = v2

Answer:

10.45

Explanation:

pH = -log [H+]  

pH = -log ( 3.5*10^-11)  

pH = 10.45

Answer:

10.45

Explanation:

Hi!!

CORRECT ANSWER = D

Heat vaporization is

D- It's the heat required to change a gram of substance from a liquid to a gas

☺☺☺

Answer:

H2O is the chemical formula for water or in simple language its is water

Explanation:

Water, one of the most vital elements for life on Earth, has the chemical formula [tex]H_20[/tex]. It is made up of one oxygen atom and two hydrogen atoms joined together covalently.

Due to its polar nature, water can establish hydrogen bonds with other molecules, giving it special features including high surface tension, cohesiveness, and thermal stability. It serves as a solvent, a medium for metabolic reactions, and a mechanism for controlling temperature, all of which are essential for diverse biological activities. Water is also essential to the functioning of Earth's ecosystems since it erodes the land and supports a variety of aquatic life. Water is essential for supporting all forms of life because of its quantity and adaptability.

To know more about hydrogen bonds, here

brainly.com/question/31139478

#SPJ6

Answer:

14 Electrons

Explanation:

I know because I know

Answer:

14 electrons can occupy the f sub level

Explanation:

Electronic configuration is the short representation which we use to represent the structure of an atom.

Atomic number of phosphorus is 15 so it has 15 electrons.

The electronic configuration of Phosphorus is given as [tex]1s^2 2s^2 2p^6 3s^2 3p^3[/tex]

Here the superscript number represents the electrons 2 + 2 + 6 + 2 + 3 = 15 electrons of Phosphorus

Orbital diagram too is used for this purpose.

A circle or a square is used to represent an orbital.

This is the orbital diagram of Radon (atomic number -86)  

Each orbital occupies 2 electron.

Shells are named using letters K, L, M, N and so on or using numbers 1, 2, 3, 4 etc.,

The number of electrons, a shell can accommodate is found using formula [tex]2n^2[/tex] where n is the number of the shell.

Shell 1 contains subshell s

Shell 2 contains subshell s, p

Shell 3 contains subshell s, p, d

Shell 4 contains subshell s, p, d, f

Subshells or sub level are represented by letters s, p, d, f, g, h, i and so on.

s contains 1 orbital with 2 electrons

p subshell contains 3 orbital with 6 electrons

d with 5 orbitals and 10 electrons  

f with 7 orbitals and 14 electrons.

(Answer)

Can cause a chemacal reaction

can i have brainliest i need it