PLEASE HELP ASAP‼️‼️
A
B
C
D

Answer:

the answer is H ..............

Answer:

Neutron - non charged particle in nucleus

nucleus - composed of proton and Neutron

electron - negatively charged particle that moves around the nucleus

proton - positively charged particle in the nucleus.

Explanation:

these the are definitions of the terms

Answer:

2NaCl + CuCO3

FeCl2 + BaSO4

CuCO3 + Ca(NO3)2

Explanation:

Presumably this is a double replacement reaction.

A+B + C+D → A+D + C+B

It seems I may be wrong so please try to work out the problem yourself to double check, keeping in mind the charges of each compound.

Answer:

As the Mentos candy sinks in the bottle, the candy causes the production of more and more carbon dioxide bubbles, and the rising bubbles react with carbon dioxide that is still dissolved in the soda to cause more carbon dioxide to be freed and create even more bubbles, resulting in the eruption

Answer:

1

Explanation:

1

Answer:

The flow chart is found in the attachment

Explanation:

The mixture of 4-chloroaniline, benzoic acid and 1,4-dibromobenzene is separated based on their different solubility properties.

4-nitroaniline is basic and is first extracted using an acid, hydrochloric acid.

Benzoic acid is an acid, hence is extracted using a base, using either sodium hydrogen carbonate or sodium hydroxide.

1,4-dibromobenzene is neutral and is extracted from an organic solvent by evaporation using its property of solubility in an organic solvent.

In the flow chart illustrating the separation process, first the mixture of organic compounds is dissolved in ether, an organic solvent and then placed in a s eparatory funnel.

Then, the basic amine compound,  4-chloroaniline is removed from the organic layer into an aqueous layer by adding an inorganic acid, HCl. The aqueous lower layer is drained into a conical flask. The 4-chloroaniline is then precipitated out of solution by adding concentrated NaOH dropwise.

The organic acidic, benzoic acid is then extracted from the organic layer by adding an inorganic base, sodium hydrogen carbonate. The lower aqueous layer is drained into another flask. Benzoic acid is then precipitated out of solution by adding a concentrated solution of HCL.

The neutral 1,4-dibromobenzene is then obtained by evaporation of the organic solvent

Answer:

Ketones and ketoacids are alternative fuels for the body that are made when glucose is in short supply. They are made in the liver from the breakdown of fats. Ketones are formed when there is not enough sugar or glucose to supply the body's fuel needs. This occurs overnight, and during dieting or fasting.

Explanation:

Answer:

Because winds are named for the direction from which the wind is blowing, .Explanation: the winds are called the northeasterly trade winds in the Northern Hemisphere and the southeasterly trade winds in the Southern Hemisphere.

Explanation:

If 50.0 grams of Zinc are reacted with 50.0 grams of Hydrogen Chloride ... 50.09 Zn x 1 mol Zn , Imol ZnCl2 , 136.4g. ... If a decomposition reaction produces a 75.0% yield for the oxygen by mass (128.0 grams were.

Answer:

A. Glucose

Explanation:

Glucose is a monomer and not a polymer. So, option (A) is not a polymer.

Glucose is not a polymer because it is a kind of molecule while Starch , cellulose and DNA are polymers.

The correct answer is option A. Glucose.

Answer:

I also think NaOH is the answer since they are all strong electrolytes and NaOH has the highest number

Answer:

lithium and sulfur

Explanation:

An ionic bond is formed between a metal, which loses electrons to form a cation, and a non-metal, which gains electrons to form an anion.

Which of the following pairs of atoms is most likely to form an ionic bond?

Answer:

19.12 L

Explanation:

At STP(i.e. Standard temperature and pressure).

The volume occupied by one mole of gas = 22.4 L

The pressure = 1 atm

The temperature = 273 K

Thus, since 1 mole of gas = 22.4 L;

Then 0.853 moles of N2 gas will occupy:

= (0.853 moles of N2 gas × 22.4 L)/ 1 mole of N2 gas

= 19.12 L

Answer:

A: Is constant irrespective of mass of the gases

Explanation:

Avagadro's number, denoted by nA, is a number that represents the units in one mole of any substance. The number is 6.02214076 × 10²³ and the units can be atoms, molecules, ions, formula units etc.

That is;

1 mole of a substance = 6.022 × 10²³atoms, molecules, ions, electrons etc.

It is important to note that the Avagyadro's number is constant irrespective of mass of the gases that are involved.

Answer:

[tex]\boxed {\boxed {\sf molarity \approx 3 \ M \ KCl}}[/tex]

Explanation:

Molarity is a measure of concentration in moles per liter. The formula is:

[tex]molarity= \frac{moles \ of \ solute}{liters \ of \ solution}[/tex]

We are given grams of solute and liters of solution, so we must convert both before calculating molarity.

We convert grams to moles using the molar mass. This value is found on the Periodic Table. It is the same as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).

We have the compound KCl, so we look up the molar masses of the individual elements.

The compound does not contain subscripts, so we can add the molar masses together to find the molar mass of the compound.

Use the molar mass as a ratio.

[tex]\frac {74.548 \ g\ KCl}{1 \ mol \ KCl}[/tex]

Multiply by 140 grams of KCl.

[tex]140 \ g\ KCl*\frac {74.548 \ g\ KCl}{1 \ mol \ KCl}[/tex]

Flip the ratio so the units of grams of KCl cancel.

[tex]140 \ g\ KCl*\frac{1 \ mol \ KCl} {74.548 \ g\ KCl}[/tex]

[tex]140 *\frac{1 \ mol \ KCl} {74.548 }[/tex]

[tex]1.877984654 \ mol \ KCl[/tex]

1 liter contains 1000 milliliters. Create another ratio.

[tex]\frac{ 1 \ L}{1000 \ mL}[/tex]

Multiply by 600 milliliters (the value we are converting).

[tex]600 \ mL *\frac{ 1 \ L}{1000 \ mL}[/tex]

The units of milliliters cancel.

[tex]600 \ *\frac{ 1 \ L}{1000 }[/tex]

[tex]0.6 \ L[/tex]

Now we know the moles of solute and the liters of solution.

Substitute the values into the molarity formula.

[tex]molarity= \frac {1.877984654 \ mol \ KCl}{0.6 \ L}[/tex]

[tex]molarity= 3.129974424 \ mol \ KCl/L[/tex]

The original measurements of grams and milliliters have 2 and 1 significant figures. We must round our answer to the least number of sig figs: 1.

For the number we found, that is the ones place. The 1 in the tenths place tells us to leave the 3 in the ones place.

[tex]molarity \approx 3 \ mol \ KCl/L[/tex]

1 mole per liter is equal to 1 molar or M. Convert the units.

[tex]molarity \approx 3 \ M \ KCl[/tex]

The molarity is approximately 3 M KCl.

Answer:

b) methanol, bp = 65°C.

Explanation:

Hello there!

In this case, it turns out necessary for us to firstly remember that the vapor pressure of a liquid is the pressure exerted by the gaseous particles in dynamic equilibrium with the present liquid and thus, the higher the vapor pressure, the weaker the liquid's intermolecular forces because they turn unstable.

In such a way, we can infer that the liquid with the highest vapor pressure, will have the lowest boiling point and therefore, the answer will be b) methanol, bp = 65°C.

Regards!

Answer:

(a).

[tex]order \: of \: A = 2 \\ order \: of \:B = 0 \\ rate = k[A] {}^{2} [B][/tex]

(b)

[tex]0.32 \times {10}^{ - 3} = k {(0.12)}^{2} (0.15) \\ k = 0.148 \: {mol}^{ - 2} {dm}^{6} {s}^{ - 1} [/tex]

(c). The rate increases because kinetic energy of reactant molecules increases.

Answer:

the scientific study of the relations between heat and other forms of energy

maybe is answer is rhyolite

Answer:

the answer is rhyolite.

Explanation:

i'm pretty sure it is my guy

Answer:

See explanation

Explanation:

The electrophilic substitution of aromatic compounds occurs faster in substituted aromatic compounds due to the fact that the ring becomes more or less susceptible to electrophilic attack depending on the nature of the substituent in the ring.

Electron pushing substituents such as alkyl groups stabilize the positive charge developed during electrophilic substitution hence they activate the ring towards electrophilic substitution.

The methyl group is an ortho - para directing substituent hence the product obtained by nitration of toluene is o-nitrotoluene and p-nitrotoluene.

The stepwise mechanism for obtaining these products is shown in the image attached to this answer.

Answer:

You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to determine which layer is the aqueous layer.

Explanation:

In the separating funnel, the liquid with less density exists at the top layer and the liquid with greater density will exist at the bottom layer.

To identify the aqueous layer, add a bit of water to the separating funnel.

Then, observe where the water will go and mix.

If it mixes with the bottom layer, then the bottom layer is the aqueous layer.

If water mixes with the top layer, then top layer is the aqueous layer.

A method we could use to determine which layer is the aqueous layer is by adding 2-4 drops of water in the separatory funnel.

Explanation:

So, from this, we can conclude that a method we could use to determine which layer is the aqueous layer is by adding 2-4 drops of water in the separatory funnel.

Learn more about separatory funnel here;

brainly.com/question/5536204?referrer=searchResults

brainly.com/question/5999552?referrer=searchResults

Answer:

Diethyl ether

Explanation:

The retention factor is measure of how much interaction that exists between the solvent and the solutes. A high retention factor means that the solute travels too quickly through the mobile phase.

The value of Rf shows how good a solvent is in achieving separation of the components of a mixture by TLC.

If the Rf is moderate, then the solute does not travel too quickly through the column. If the solute travels too quickly through the column(too high Rf), minimum separation is achieved. If the Rf is too low, the solute has more affinity for the stationary phase than it does for the mobile phase hence separation is not feasible.

We can see that in both cases, diethyl ether has a moderate Rf hence it achieves a better separation of compound A and B than pentane.

Answer:

Lake Treatment

Explanation:

Sulphuric dioxide produced by industries and released into the atmosphere returns as acid rain or sulphuric acid. In lakes impacted by acid rain, such as in Ontario, Canada, the application of alkalis dropped by airplanes can control and neutralize the water's pH level.

Answer:

A. True

Explanation:

Answer:

Answer will be A

Explanation:

PLS MARK BRAINLIEST

Explanation:

D)None of the above!!!!

B: Always act on different objects

Answer:

D) a four-fold increase

Explanation:

According to Gay-Lussac's law, which states that the pressure of a given amount of gas is directly proportional to the temperature at a constant volume, the pressure increases with an increase in temperature.

According to this question, at a fixed volume, a four-fold increase in the temperature of a gas will lead to a four-fold increase in the pressure as well.