how does the volume of the gas change when the pressure increased

The larger crystal sodium chloride could be represented perfectly by the use of the model of the crystal.

A crystal is an arrangement of the ions in are found in an ionic substance. We know that ions are contained in crystals and that these ions are arranged in a definite pattern such that we have a crystal structure that is definite. The ions are arranged in a regular repeating pattern and models of the crystal could be shown in;

A ball and stick model

A space filling model.

Thus, a larger crystal could be replicated by a model. Note that the model serves the purpose of both explanation and predication of the properties of the sodium chloride crystal.

In the model, the sodium ions are arranged in alternate position with the chloride ions. The continuous network of the alternate ions in the system is the determinant of the properties of the system.

In a model, it is common to represent each of the ions in the system by the use of dots. The dots often have differing colors.

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An Atom is the fundamental particle of matter, and any further breakdown of this would result in loss of the properties that are unique to its element.

The smallest piece of matter with all of an element's chemical properties is an atom. Neutrons, protons, and electrons make up an atom's three constituent parts. The atom's nucleus is a compact, positively charged core made up of protons and neutrons, and is surrounded by an electron cloud, which is made up of negatively charged electrons.

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Answer:

Organic Chemistry.

Inorganic Chemistry.

Physical Chemistry.

Analytical Chemistry.

Stereochemistry.

Biochemistry.

Geochemistry.

Forensic Chemistry.

Explanation:

Question:

7 types of chemistry

Answer:

Inorganic Chemistry, Physical Chemistry, Analytical Chemistry,  Stereochemistry, Biochemistry, Geochemistry, and Forensic Chemistry.

Explanation:

Inorganic chemistry is a branch of chemistry that deals with inorganic compounds. Physical chemistry is the branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems. Analytical chemistry studies and uses instruments and methods to separate, identify, and quantify matter. Stereochemistry is the branch of chemistry concerned with the three-dimensional arrangement of atoms and molecules and the effect of this on chemical reactions. Biochemistry is the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms. Geochemistry is the study of the chemical composition of the earth and its rocks and minerals, and Forensic chemistry is the application of chemistry and its subfield, forensic toxicology.

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Answer:

the experimenter should include an observater and an analysis

Explanation:

Answer:

The part 1 of the experiment designed to test whether land or water heats faster is answered below for each and every questions.

1 ) The experiment will test whether land or water heats faster

2 ) The independent variable of this experiment is sand, water and heat lamps and the dependent variable is the rate of heat transfer.

3 ) The sand represents the land part of the hypothesis

4 ) The water represents the water body part of the hypothesis

5 ) The heat lamps represent the sun which provided heat

6 ) The thermometers will be used to measure the temperature

7 ) It could be set up such a way that the sand and water receives equal amount of heat from the lamps for an equal amount of time.

8 ) The temperature can be measured using the thermometer to see whether the land or water has gained more heat. Whichever has gained more heat, heats faster.

9 ) Within a 24-hour period, the three points, the temperature be taken are at 8 hours, 16 hours and 24 hours. Because the temperature should be taken at a steady rate of time.

10 ) An effective conclusion would include the facts that proves the hypothesis.

Therefore, the part 1 of the experiment designed to test whether land or water heats faster is answered above

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Answer:

Double replacement reaction, Al(OH)3 + Na3(NO3)

Explanation:

1) We can see that there are 2 compounds that contain 2 elements. This means we have a double replacement reaction.

2) Make the products

Take the elements on the outside of the equation

Al+3 and (OH)-1

criss cross the charges and you get

Al(OH)3

Now do the same with the remaining elements

Na+1 (NO3)-3

Na3(NO3)

Al(OH)3 + Na3(NO3)

Answer: 2.1 g/mL

Explanation:

Answer:

Aspirin

Explanation:

I'm doing the same unit in biology

Answer:

Iron(III) sulfate (AKA Fe2(SO4)3)

Explanation:

Answer:

a) 3 sig figs

b - d) 4 sig figs

e) 2 sig figs

Explanation:

When it comes to sig figs natural numbers count. Zeros only count when thay are in between natural numbers. For example 1.05 g has 3 sig figs and they are 1, 0, and 5. And 0.0003040 mm has 4 sig figs since the 4 trailing zeros before the 3 don't count.

One gram of sodium chloride takes longer to dissolve in a solution of 2M glucose than in pure water. This is because diffusion happens faster in pure water than in a solution containing a solute i.e. glucose and thus it will take longer to dissolve as a result of large number of collisions.

If you were to put 1 gram of sodium chloride (NaCl) in a beaker of pure water, it would eventually dissolve. However, if you dissolve same amount of sodium chloride (NaCl) in a beaker of water containing 2 moles of glucose, sodium chloride would take longer to completely dissolve.

The reason for this is that, in a solution having more molecules, the sodium chloride would experience more collisions. Due to this, the rate of diffusion will slow down, and thus, sodium chloride will take longer to completely dissolve.

To put it simply, solutions having large number of molecules present exhibit slower diffusion rate than solutions with fewer molecules present. So, if you want the sodium chloride to dissolve quickly,  the best way is to put it in a solution of pure water.

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B. The final speed of the ball when it hits the ground is determined as 24.2 m/s.

The final speed of the ball can be determined by applying the principle of conservation of energy as follows;

K.E = P.E

¹/₂mv² = mgh

v² = 2gh

v = √2gh

where;

Substitute the given parameters and solve for the maximum speed of the ball.

v = √(2 x 9.8 x 30)

v = 24.2 m/s

Thus, the final speed of the ball when it hits the ground is determined as 24.2 m/s.

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Answer:

How do you identify an unknown white powder?

Not only can Raman spectroscopy be used to identify unknown white powders rapidly, it can also be used to identify explosives (Figure 3) and other biochemical agents such as anthrax and mustard gas

Explanation:

The way that a person can be able to identify an unknown white powder as a compound or any element is by the use of  Raman spectroscopy, With its use, one can know if they are explosives,  biochemical agents or others.

The other ways to identify them are:

Therefore, The way that a person can be able to identify an unknown white powder as a compound or any element is by the use of  Raman spectroscopy, With its use, one can know if they are explosives,  biochemical agents or others.

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See full question below

How do you identify an unknown white powder?

The number of kilograms of dry air in the room that measures 15.0 ft by 18.0 ft by 8.00 ft is 71.44 Kg

We'll begin by obtaining the volume of the room. This can be obtained as follow:

Volume = dimension

Volume = 15.0 ft × 18.0 ft × 8.00 ft

Volume = 2160 ft³

Multiply by 28.3168 to express in liter

Volume = 2160 × 28.3168

Volume = 61164.288 L

The mass of the dry air can be obtained as follow:

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of dry air = 1.168 × 61164.288

Mass of dry air = 71439.89 g

Divide by 1000 to express in kilograms

Mass of dry air = 71439.89 / 1000

Mass of dry air = 71.44 Kg

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By ideal gas approximation, the molecular weight of the polymer sample is 861471.83 grams.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (0.0821 atm.L/mol.K) and T is temperature.

From the question above, we know that

ρ = 25 g/L

P = 0.54 torr = 0.00071 atm

T = 25⁰ C = 298 K

We can change the number of moles to density form

P . V = n . R . T

P . V = gr/(Mr polyacrylamide) . R . T

Mr polyacrylamide = ρ  . R . T / P

Mr polyacrylamide = 25 . 0.0821 . 298 / 0.00071

Mr polyacrylamide = 861471.83 gram

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option D is correct. The atom's orbital configuration shows the number of valence electrons present and predicts the number and types of bonds the atom will form.

A three-dimensional representation of an electron's most likely position within an atom is called an orbital.

The number and type of bonds that an atom is expected to make are among the chemical features of an atom that can be predicted using the orbital configuration of neutral atoms.

it  Determines which atom will create the most bonds by using the orbital diagrams. Alkaline earth metal atoms combine with other elements to produce compounds.

So, thus we can say that The atom's orbital configuration shows the number of valence electrons present and predicts the number and types of bonds the atom will form.

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Answer:C

Explanation: i did this !

B. The MOST plausible prediction and explanation of the ending mass is 3g of (AgCl + NaBr); matter is conserved so the total mass will be the same in the beginning and end.

The law of conservation of matter states that mass cannot be created nor destroyed, but can be converted from one form to another.

When the law of conservation of matter or mass is applied in a chemical reaction we will observe the following;

From the given chemical reaction;

2 g of NaCl + 1 g of AgBr = ?AgCl + ? NaBr

Based on the law of conservation of matter, the total mass of the reactants (3 g) must be equal to the total mass of the product (3 g) because matter is conserved.

Thus, the MOST plausible prediction and explanation of the ending mass is 3g of (AgCl + NaBr); matter is conserved so the total mass will be the same in the beginning and end.

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The density (mass per volume) of most liquids increases as the temperature is lowered.

When the temperature is lowered, most liquids become denser (mass per volume). Density decreases as temperature rises more. Density rises with a drop in temperature.

Most liquids expand in volume as the temperature rises, which causes the density of the liquids to decrease. Similar to this, as temperature drops, most liquids lose volume, increasing density.

The molecules of a liquid or gas move more quickly, collide, and spread apart when it is heated. The molecules take up more space because they are dispersed widely. Their density is lower. Whenever a liquid or gas is cooled, the opposite happens.

When a substance is heated, the molecules move faster and slightly farther apart, taking up more space and causing the density to decrease. When something is cooled, the molecules slow down and get a little closer together, taking up less space and becoming denser.

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Along the diverging boundary, a deep valley known as a rift valley develops.

A valley is a long, low terrain that frequently stretches between hills or mountains. It usually has a river or stream that flows from one end to the other.

The majority of valleys are created by rivers or streams eroding the land's surface over a very lengthy period of time.

A valley is a low area of ground between hills, particularly one through which a river flows.

In "triple junctions," a type of divergent boundary where three tectonic plates collide at angles of around 120°, several rift valleys are found.

Thus, along the diverging boundary, a deep valley known as a rift valley develops

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bro pleas can explane me why is so hard

Explanation:

Answer: USA is on the North plate American!

Explanation:

Van der Waals forces. Van der Waals forces are very weak forces between two very close surfaces.

Forces of van der Waals. When two surfaces are very close to one another, van der Waals forces are very weak.

In gases, liquefied and solidified gases, and nearly all organic liquids and solids, neutral molecules are drawn to one another by van der Waals forces, which are relatively weak electric forces.

Van der Waals interactions are nonionic forces that have a comparatively low energy of 0.5 to 1 kcal/mol.

The covalent link from its less electronegative Neighbour atom tends to drive the electron cloud toward neutral molecules with electronegative atoms like oxygen and nitrogen.

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Polar molecules have positive and negative ends and stronger intermolecular forces of attraction as compared to Non - Polar molecules.

The compound that are held together by polar covalent bonds are known as Polar compounds. For Example water molecule, both the ends of water molecule are oppositely charged due to which intermolecular forces increases. Polar substances have relatively high melting points and boiling points.

When electrons are shared equally in a covalent bond there is no net electrical charge across the molecule , the molecule is known as Non-Polar Molecule. Example - [tex]O_{2} , N_{2}[/tex], etc.

Polar molecules have positive and negative ends and stronger intermolecular forces of attraction as compared to Non - Polar molecules.

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Answer:

Oppositely charged ends

The average atomic mass of isotopes of magnesium is 23.4 amu

To get the average atomic mass we have to multiply mass of each isotopes to the % of abundance and then add and divided by 100.

Isotope of magnesium given as,

1) 22.5 amu has an abundance of 78%

= (22.5 × 78 )  = 1755.0

2) 25.3 amu has an abundance of 13 %

= ( 25.3 × 13 ) = 328.9

2) 24.6 amu has an abundance of 9 %

= ( 24.6 ×9) = 221.4

The average atomic mass of magnesium will be

= (1755.0 + 328.9 + 221.4 ) /100

= 23.4 amu

Thus,The average atomic mass of isotopes of magnesium is 23.4 amu

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The number of dilutions needed to be made before getting to 2.5 % as the final concentration would be 2.

We are given that, we have to do 50% serial dilution, which means that after every dilution the concentration reduces to half of its initial value.

On starting with 10% concentration, the concentration after one dilution would be 5%.

After diluting it two times, the final concentration would be half of 5% i.e 2.5%.

Thus, the number of dilutions needed to be made before getting to 2.5 % as the final concentration would be 2.

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A Jumping motion a spring in a ball point pen or a pogo stick get its energy. Energy that a moving object has due to its motion is Kinetic Energy.

Kinetic energy:

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The energy is kinetic energy. In a jumping motion a spring in a ballpoint pen or a pogo stick gets its energy when an object moves.

A moving object or particle's kinetic energy, which depends on both mass and speed, is one of its characteristics.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles.

A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all instances of objects in motion that use kinetic energy.

Kinetic energy (KE) is determined by multiplying the mass of an item (1/2*m) by the square root of its velocity.

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Answer:

7.35

Explanation:

I answer is water is 7.35. Molar solution.

D and E are correct statements

The water now has a volume of 367.84 ml.

Density = Mass/Volume

The mass of the lead sample = 5 gm

The mass of the iron sample = 3.2 g

The volume of the water = 367 ml

The density of lead = 11.34 g/cc

The density of iron = 7.874 g/cc

The volume of the lead = Mass of lead/Density of lead = 5/11.34 = 0.441ml

The volume of lead is  0.441ml.

The V of iron is,

V = m/d = 3.2/7.874 = 0.406 ml

The volume of iron is 0.406 ml.

The water sample's new volume level is

367 + 0.441 + 0.406 = 367.84 ml, where

the new volume equals the original water volume plus the lead and iron amounts.

The water now has a 367.84 ml new volume level.

As a result,

367.84 is the new volume level of the water without the unit.

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The model as shown in useful in the explanation of reflection.

The term model refers to that which represents reality. A model could be used for the purpose of explanation or for the purpose of prediction. It is used to show how there are connections in real life.

Now let us examine the model as shown. We can see that this is a model of reflection. The image of the ball can be seen on the mirror because light that falls on the ball is reflected towards the mirror.

This model is very useful in the description of the the phenomenon of reflection in the real life.

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