The molality of a solution is a measure of -
A - moles of solute per kilogram of solution
B - moles of solute per liter of solution
C - moles of solute per kilogram of solvent
D - moles of solute per liter of solvent

Atom

A chemical bond forms when the atom of one element interact(s) with an atom of another element.

sample c because it has the highest absorption

Answer

1. 1cm=10mm, 1kg=1000g and 12in=1 ft

2. 50mm=5cm

    48 in =4ft

     36ft=12 yd

     2.5m=250cm

     1000mL= 1 L

Explanation

if 1cm=10mm then 5cm=?

5×10=50mm

if 12 in =1ft then 48in=?

48/12 =4 ft

if 1m=100cm, then 2.5m=?

2.5×100= 250cm

and when know from capacity that 1000mL is equivalent to 1 liter.

Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height

Gravitational potential energy is the energy an object possesses due to its position above the ground, calculated with the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height.

The type of potential energy that depends on height is called gravitational potential energy. When an object is raised against the pull of gravity, work is performed, resulting in an increase in potential energy. This energy is calculated using the formula PE = mgh, where m is the mass, g is the acceleration due to gravity, and h is the height the object is raised. For example, if you lift a car to the top of a parking garage, you are increasing its gravitational potential energy regardless of how the car is moved there.

Considering an object's potential energy available when a body of water is trapped behind a dam, it can be computed similarly. The gravitational potential energy is half the product of the mass, acceleration due to gravity, and the average height (mgh/2), since the height of the water smoothly transitions from h to zero as it drains out. Volume is the product of the area A of the captured water surface and the initial water height h, and the mass is the product of the density p and the volume.

In essence, objects have potential energy due to their position relative to other objects with mass, and the gravitational force provides a way to release this energy, as seen when an object is allowed to fall back to the ground, converting potential energy to kinetic energy.

Answer:

W = ΔKE = 1/2mv₂⁽²⁾ - 1/2mv₁⁽²⁾

Explanation:

Work means Change In Kinetic Energy.

Kinetic-Energy is equal to change in velocity multiplied by mass and divided by 2

∴ KE = 1/2m²

Change in Kinetic-Energy =KE₂ - KE₁

                                             =1/2mv₂⁽²⁾ - 1/2mv₁⁽²⁾

The work-kinetic energy theorem is expressed by the equation: [tex]\[ W_{\text{net}} = \Delta KE \][/tex]. So, the correct option is: d) [tex]\( W_{\text{net}} = \Delta KE \)[/tex].

The work-kinetic energy theorem states that the net work done on an object is equal to the change in its kinetic energy. Mathematically, it is expressed as [tex]\(W_{\text{net}} = \Delta KE\)[/tex]. Here, [tex]\(W_{\text{net}}\)[/tex] represents the net work done on the object, and [tex]\(\Delta KE\)[/tex] is the change in kinetic energy.

This theorem is fundamental in understanding the relationship between the work done on an object and the resulting change in its motion.

When a net force is applied to an object, it performs work, transferring energy to or from the object. This work leads to a change in the object's kinetic energy, which is associated with its motion. If the net work is positive, the kinetic energy increases, implying an acceleration or an increase in speed.

Conversely, if the net work is negative, the kinetic energy decreases, resulting in deceleration or a decrease in speed. The work-kinetic energy theorem provides a crucial link between the concepts of work and energy in the dynamics of moving objects.

Complete Question:

Which of the following equations expresses the work-kinetic energy theorem?

a) [tex]$\mathrm{ME}_{\mathrm{i}}=\mathrm{ME}_{\mathrm{f}}$[/tex]

c) [tex]$\triangle W=K E$[/tex]

b) [tex]$W_{\text {net }}=P E$[/tex]

d) [tex]$W_{\text {net }}=\Delta K E$[/tex]

The potential future effects of global climate change include more frequent wildfires, longer periods of drought in some regions and an increase in the number, duration and intensity of tropical storms.

Climate change has long been a myth of the left to trick you into following there crazy policies, "climate change" has been happening for 30,000 years. The great lakes used to be glaciers, now there lakes. Climate change is not man made. O2 has been in the atmosphere for thousands of years aswell, not only that, but we need O2 for plants. To answer your question, you should stand up to your teacher and give them the facts.

Yes, potassium is a metal

Charles' Law is a special case of the ideal gas law. It states that the volume of a fixed mass of a gas is directly proportional to the temperature. This law applies to ideal gases held at a constant pressure, where only the volume and temperature are allowed to change.

Charles' Law is expressed as:

Vi/Ti = Vf/T f

where

Vi = initial volume

Ti = initial absolute temperature

Vf = final volume

T f = final absolute temperature

It is extremely important to remember the temperatures are absolute temperaturesmeasured in Kelvin, NOT °C or °F.

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Answer: a principle stating that if a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constrain

Use Charle's Law because we are dealing with volume and temperature.

[tex]\frac{v}{t} =\frac{v}{t}[/tex]

v₁= 3017.0 ml

t₂ = 0

v₂= ???

t₂= 273°C

Change all mL's to L because the question says "What is the volume (L)...".

3017.0 mL = 3.017 L

Change the temperature into Kelvins:   Kelvin = Celsius + 273.15

0°C = 273.15 K

273°C = 546.15 K

Now you can plug it in the formula:

[tex]\frac{3.017}{273.15} = \frac{v}{546.15}[/tex]

Then, do cross multiplication.

(3.017) (546.15) = (273.15) v₂

1,647.73 = (273.15 K) v₂

                                         Divide 273.15 on both sides

6.0296 L= V₂

Answer:

a small rock sitting on top of a big rock

a stretched rubber band

Explanation:

A small rock sittin on the top of a big rock has stored energy because of the potential energy that it contains, as well as the stretched rubber band in all the kinetic energy that is stored in the streched rubber band and it is just about to free it as soon as what is keeping it stretched liberates it.

= 20,280.25 g or 20.28 Kg

Number of moles, n = Molarity × Volume

Molarity = 6.81 M

Volume = 8.7 L

Number of moles = 6.81 × 8.7

                             = 59.247 moles

Mass = Moles × Molar mass

         = 59.247 ×  34.2 g/mol

          = 20,280.25 or

          = 20.28 Kg

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.26×10²³ molecules are there in 24 grams of  FeF[tex]_3[/tex].

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole =given mass ÷ molar mass

given mass of FeF[tex]_3[/tex]=24 grams

Molar mass of FeF[tex]_3[/tex] = 112.84 g/mol

mole =24 ÷ 112.84

        =0.21 moles

number of molecules/atoms=number of moles × 6.022×10²³

number of molecules=0.21 × 6.022×10²³ molecules

                                   = 1.26×10²³ molecules

Therefore, 1.26×10²³ molecules are there in 24 grams of FeF[tex]_3[/tex].

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Answer:

[OH⁻] = 10⁻¹⁴/[H⁺].

Explanation:

∵ [H⁺][OH⁻] = 10⁻¹⁴.

∴ [OH⁻] = 10⁻¹⁴/[H⁺].

Answer:

[tex]Kw = [H+][OH-][/tex]

Explanation:

For a given solution H+ refers to the hydrogen ion concentration and is indicative of the acidity of the solution. The more the [H+] concentration, higher is the acidity. Similarly, OH- refers to the hydroxide ion concentration and reflects the basicity of the solution. A solution with a higher OH- concentration is said to be basic.

The two are related by considering the dissociation of water:

[tex]H2O(l)\rightleftharpoons H+(aq)+ OH-(aq)[/tex]

The dissociation constant for water, Kw is:

[tex]Kw = [H+][OH-]\\\\where\ Kw = 10^{-14} \\\\10^{-14} = [H+][OH-]\\[/tex]

[tex][H+] = \frac{10^{-14}}{[OH-]}[/tex]

= 607.568 Torr

1 in of mercury is equivalent to 25.4 Torr

Therefore;

23.92 InHg will be equal to;

23.92 × 25.4

= 607.568 Torr

The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass number of 35 amu. To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together.

To calculate the average atomic mass of an element from percent abundances, convert the abundances to decimals, multiply each decimal by the atomic mass of the corresponding isotope, and sum the products.

The average atomic mass of an element can be calculated using the percent abundances of its isotopes. To do this, convert the percent abundances into decimal form by dividing by 100. Then, multiply each decimal abundance by the respective isotope's atomic mass. Finally, add the products together to get the average atomic mass of the element.

Density = mass/volume.

You are given the density and asked to find the mass.  So, you need to find the volume.  According to Archimedes Principle, the volume displaced by an object is equal to the volume of that object.  So, in this problem the volume of the lead is the same as the volume of water that it displaced.  That would be  

95.6 ml - 73.2 ml = 22.4 ml.  

Density = mass/volume

11.3 g/ml = mass/22.4 ml

mass = 11.3 g/ml x 22.4 ml = 253 g (to 3 significant figures)

The problem deals with the concept of density and requires working out the change in volume when a lead cylinder is added to water. The mass of the lead cylinder is found by multiplying the density by the change in volume, providing an answer of approximately 253.2 grams.

The problem you've outlined can be solved using the concept of density. Density is defined as mass per unit volume. In your case, the volume changes when the lead cylinder is added to the water providing the volume of the lead cylinder. This change in volume is calculated as 95.6 mL - 73.2 mL = 22.4 mL. Now, since density is mass/volume, we can find the mass by multiplying density by volume: (11.3 g/mL) * (22.4 mL) = 253.2 grams. So the mass of the lead cylinder is approximately 253.2 grams.

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The answer to that question would be Activation energy. If would like me to elaborate just let me know. :)

Answer: Activation energy

Explanation:

Activation energy is the minimum energy required to initiate a chemical reaction.

It is the minimum energy required to excite reactant to break bonds and react with each other in the system while creating new products.

Answer: Specific heat capacity is the measurement of how much energy (in J) has to be added to 1 kg of a substance to increase the temperature of that substance by 1 o C. Simply, substances with a low specific heat capacity heat up quickly - but then they lose their heat quickly. Substances with a high specific heat capacity require a large amount of heat to be added to change their temperature - but then they hold their heat much longer.

Explanation: Think of heating a pot of soup on the stove and stirring it with a metal spoon. If you leave the spoon sitting in the pot for even a few minutes and you return, the spoon will be hot enough to burn your hands - and the soup will feel only slightly warmer. This happens because the specific heat capacity of the metal spoon is much lower than that of the water in the soup. Water has the highest specific heat capacity of any liquid.

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The specific heat of water is greater than the specific heat of metals, which means water requires more energy to change its temperature than metals.

The best choice to describe the specific heat of water compared to that of metals is option C. The specific heat of water is greater than the specific heat of metals. This means water requires more heat energy to change its temperature compared to metals. For example, if we have equal masses of water and metal and apply the same amount of heat, the temperature of the metal will increase more quickly than that of the water because water has higher specific heat.

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Answer:

Mass in grams of formaldehyde = 196.51 g

Explanation:

No. of molecules of formaldehyde = [tex]3.94 \times 10^{24}[/tex]

Moles is related with number of molecules as:

[tex]mol=\frac{No.\ of\ molecules}{Avogadro's\ no.}[/tex]

Avogadro's no. = [tex]6.02 \times 10^{23}[/tex]

moles of formaldehyde

                [tex]=\frac{3.94\times 10^{24}}{6.02\times 10^{23}} \\=6.544\ mol[/tex]

Molar mass of formaldehyde = 30.03 g/mol

Molar mass is related with mass as:

Mass = Moles × Molar mass

        = 6.544 × 30.03

       = 196.51 g

B: quantity of solute with a specific volome of solvent.

Have a Nice Day :)

Answer: quantity of solute dissolved in a given quantity of solvent

Explanation:-

Dilute : is defined as a solution in which amount of solvent is more than the amount of solute.

Concentrated: is defined as a solution in which amount of solute is more than the amount of solvent.

ppm: ppm is defined as the concentration when 1 part of the solute is  dissolved per 1 million of the solution.

Molarity: Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Molality : Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.

Normality: Normality of a solution is defined as the number of ram equivalents of solute dissolved per Liter of the solution.

D. Polyacrylonitrite

hope i help my bad if i'm wrong

a is Cation

b is delocalised electrons

This diagram is a representation of physical property in metal called Malleable

c is the electrostatic force

Who cares? unless you wanna be a scientist when you get older. this is pointless

10 mL more water is needed to do so...

Step #1: Convert to grams.

120kg × (1000g ÷ 1kg) = 120000g of copper

Step #2: Convert sample mass of copper to moles by dividing sample mass to its atomic weight. Atomic weights could be found in periodic table.

120000g Cu × (1mol Cu ÷ 63.55g Cu) = 1888.277mol Cu

Step #3: Convert moles to atoms by multiplying moles to Avogadro's number.

1888.277mol Cu × (6.022x10^23 ÷ 1mol Cu) = 1.137x10^27 atoms Cu

*I attached a picture to help out with conversions.

There is 120000 grams in a pure copper statue.

Answer:

The relative number of products and reactants

Explanation:

In Chemistry, the coefficients in a chemical formula represent the number of molecules involved in a chemical reaction. These coefficients provide a quantitative relationship between the reactants and products of a reaction, which is part of a concept called stoichiometry.

In a chemical formula, coefficients provide a quantitative assessment of the relationships between the amounts of substances consumed and produced by a reaction. They allow the representation of the relative numbers of different entities or chemical species involved in the reaction. This is a part of a concept called stoichiometry, derived from the Greek words stoicheion (meaning “element") and metron (meaning "measure”).

An example of this can be seen in a balanced chemical equation. Coefficients from the equation are used to derive stoichiometric factors that subsequently may be used for computations relating reactant and product masses, molar amounts, and other quantitative properties. In simpler terms, a chemical equation is a symbolic representation of a chemical reaction, and the coefficient signals the number of molecules involved in that reaction.

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The Answer Is D. Have A Great Day

Answer:

D

Explanation:

diffract through an open doorway in order to propagate into the hallway.

Answer:

Diffract

Explanation:

The diffraction of sound waves is the description of how sound waves bend, change direction, as they travel around the edges of obstacles. The diffraction occurs as a result of the bending of sound waves as they find the path of least resistance to the travel path. The amount and magnitude of the diffraction occurs in proportion to the opening in the obstacle pathway. The diffraction is a property of sound that helps it bend around the corners and obstacles.

These are the answers to the incomplete statements:

Land breeze: A land breeze is a wind that blows from land to sea during the night. This is because the land cools down faster than the sea at night, so the air over the land becomes denser and sinks, creating a low-pressure area. The air over the sea is warmer and less dense, so it rises to fill the low-pressure area, creating a wind that blows from land to sea.

Sea breeze: A sea breeze is a wind that blows from sea to land during the day. This is because the sea heats up faster than the land during the day, so the air over the sea becomes less dense and rises, creating a low-pressure area. The air over the land is cooler and denser, so it sinks to fill the low-pressure area, creating a wind that blows from sea to land.

Coriolis effect: The Coriolis effect is a phenomenon that causes moving objects on a rotating Earth to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is because the Earth's rotation causes a force to act on moving objects, which deflects them to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

Thermal: A thermal is a rising column of warm air that is created when the sun heats the ground. The warm air rises because it is less dense than the surrounding air. Gliding birds and sailplanes can ride thermals to gain altitude.

Air mass: An air mass is a large body of air with consistent temperature and moisture throughout. Air masses are formed over large areas of land or sea, and they can travel long distances.

Wind: Wind is the flow of air that occurs as a result of a pressure or temperature difference between two air masses. Wind can be caused by the uneven heating of the Earth's surface, by the rotation of the Earth, or by differences in air pressure.

Hurricane: A hurricane is a large, rotating storm that forms over warm tropical oceans. Hurricanes are characterized by strong winds, heavy rain, and high waves. Hurricanes can cause extensive damage to coastal areas.

El Niño–Southern Oscillation (ENSO): El Niño–Southern Oscillation (ENSO) is a climate pattern that occurs in the Pacific Ocean. ENSO is characterized by changes in the ocean temperature and wind patterns, which can have a significant impact on weather patterns around the world. El Niño is a warm phase of ENSO, while La Niña is a cold phase of ENSO.

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