HELP ME THE WHOLE PAGE !!!! Someone help please

Answer:

D

Explanation:

The front shown in item A differs from that shown in item B because: D. Two air masses form a boundary in item A while warm air rises above cold air in item B.

An occluded front can be defined as a composite weather front that is typically formed during cyclogenesis, which eventually causes a cold front to overtake a warm front and thereby, forcing it aloft with respect to air masses.

This ultimately implies that, an occluded front causes warm air to be mostly separated from a cyclone center that is experienced at the surface of planet Earth.

Read more on air here: https://brainly.com/question/24730207

Answer:Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

Explanation:

Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

I hope it's helpful!!

A large oval organelle found in cells that stores DNA, the cell's genetic material, and regulates a number of its activities.

Like an organ in the body, an organelle is a subcellular structure that serves one or more specific duties for the cell. Some of the more important cell organelles are the nucleus, which contains genetic information, the mitochondria, which provide energy stored, and the ribosomes, which assemble proteins.

The nucleus, mitochondria, endosomal, the endoplasmic, and the Golgi apparatus are a few of the important organelles. Chloroplasts, which are involved in photosynthesis, are also present in plant cells.

To know more about organelle visit:

https://brainly.com/question/2135497

#SPJ9

Answer

The new substances often have different combinations of atoms different from the reactants.

Explanation

The reactants and the new substances in a chemical reaction contain the same atoms, but they are rearranged during the reaction. As a result, the atoms end up in different combinations in the new substances. This makes the products new substances that are chemically different from the reactants.

Answer:

The specific heat of iron is 0.449 J/g°C.

Explanation:

First, let's see the formula of specific heat:

Now, we have to replace the given data in the formula, where q = 8980 J, m = 200 g and ΔT = Final temperature - Initial temperature = 120 °C - 20 °C = 100 °C:

The specific heat of iron is 0.449 J/g°C.

0.114 mol of \(H_2SO_4\) need to react with all of this KOH

Balance Equation:

\(2 KOH ( aq ) + H 2 SO 4 ( aq ) \rightarrow K_2 SO_4 ( aq ) + 2 H_2 O ( l ) .\)

from the Equation we know that 2 mol of KOH react with 1 mole of sulphuritic acid.

so

moles of h2so4 = Moles of KOH/ 2

=0.228/2 = 0.114 moles

0.114 mol of \(H_2SO_4\) need to react.

To learn more about  neutralization reaction refer,

https://brainly.com/question/15255706

#SPJ4

Explanation:

\(v = vdm \times n\)

Vdm=22.4dm.

mole(n)=4 mol

therefore the total volume

\(v = 22.4 \times 4 \\ v = 89.6dm\)

Answer: 1/12

Explanation:

A carbon-12 atom has a mass of 12 amu, so multiplying this by 1/12, we get 1 amu.

Answer:

water and a salt

Explanation:

The acetic acid/acetate buffer system consists of a weak acid (acetic acid, CH3COOH) and its conjugate base (acetate ion, CH3COO-). When a base is added to the buffer system, the following process occurs to neutralize it:

1. The base reacts with the weak acid (acetic acid) in the buffer system to form its conjugate base (acetate ion) and water. For example, if a hydroxide ion (OH-) is added, it reacts with acetic acid as follows:

  OH- + CH3COOH → CH3COO- + H2O

2. The conjugate base (acetate ion) that is formed acts as a reservoir for hydrogen ions (H+). It can accept hydrogen ions from the solution if the pH increases. This helps to maintain the pH of the buffer system within a certain range.

3. The buffer system resists large changes in pH because the equilibrium between the weak acid and its conjugate base is shifted to maintain a relatively constant concentration of both species. This allows the system to neutralize the added base and maintain its acidic nature.

The acetic acid/acetate buffer system neutralizes an added base by reacting with it to form the conjugate base and water, and by utilizing the conjugate base to accept hydrogen ions and maintain the pH of the system.

To learn more about acetic acid, visit:

brainly.com/question/24586675

#SPJ11

The unknown liquid must have a density that is lower than that of water since ice will only float in liquids that are less dense than water.

For your information, ice has a density of 0.92 g/cm³ but water has a density of 1 g/cm³. Only liquids less dense than 0.92 g/cm³ will cause ice to sink. The unknown liquid must have a density that is lower than that of water since ice will only float in liquids that are less dense than water.

Other liquids have denser solid phases due to the tightly packed arrangement of molecules at lower temperatures. Although the water ice's hydrogen bonds are strong, their orientation causes molecules to push apart, which lowers density.

To know more about Low density visit:

https://brainly.com/question/12022043

#SPJ10

During the light reactions water is oxidized to O2. hydrogen go to Used in the reduction of NADP+.

The photolysis process, sometimes referred to as the light reaction, occurs when light is present. Typically, it occurs in the chloroplasts' grana. Pigment molecules are present in photosystems. One of the key pigments in plants that actively participates in light-related processes like photosynthesis is chlorophyll. In the chloroplast of the mesophyll cells of the leaves, a light-dependent process takes place. The stacked disc-like structures known as thylakoids make up the double-membraned cell organelles known as chloroplasts. The membrane of these thylakoids contains the pigment chlorophyll, which is necessary for the process and is where the light reaction takes place.

learn more about molecules Refer:brainly.com/question/29755819

#SPJ4

The freezing point depression of a solution containing 30.7 g of glycerin  is  calculated as -1.65°C

Equating :

It is given that,

Given mass of glycerin is = 30.7 grams (Solute)

Volume of water = 376 mL

\(K_{f}\)or molar -freezing-depression point is = 1.86°C/m

Molar mass of glycerin = 92.09 g/mole

Now, to work out the value, the mass of water should be known. Thus, to calculate, the formula used will be:

Mass = Density X Volume

Mass = 1.0 g/mL X 376 mL

Mass = 376 g or 0.376 Kg

Using the formula of melting point depression, the equation becomes:

             Δ\(T_{f}\) = i ×\(K_{f}\) ×m

T⁰-\(T_{s}\)  = \(i *K_{f} *\frac{mass of glycerin}{molar mass of glycerin * mass of water in kg}\)

in which,

Δ\(T_{f}\) = change in freezing point

Δ\(T_{s}\) = freezing point of solution that has to be find

ΔT° = freezing point of water ()

Since, glycerin is a non-electrolyte, the Van't Hoff factor will be 1.

Substituting the values in the above equation:

0⁰C₋T\(_{s}\) = 1 ×1.86°C/m ×\(\frac{30.7}{92.09g/mol * 0.376kg}\)

\(T_{s}\) = -1.65°C

Thus, the freezing point depression of a solution is  -1.65°C

Freezing point depression

Freezing point depression is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent. The freezing points of solutions are all less than that of the pure solvent and is directly proportional to the molality of the solute

Is melting point elevation or depression?

Boiling point elevation is that the raising of a solvent's boiling point due to the addition of a solute. Similarly, melting point depression is the lowering of a solvent's freezing point due to the addition of a solute. In fact, because the boiling point of a solvent increases, its melting point decreases

Learn more about freezing point depression :

brainly.com/question/26525184

#SPJ4

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

Learn more abaout reactant:https://brainly.com/question/30129541

#SPJ1

The decay rate, k, for a particular radioactive element is 3.1%, where time is measured in years. The half life of elements is 22.3 years.

Thus, The following equation relates a radioactive substance's half-life (T12) to the decay rate constant, k = ln(2) / T½.  

The decimal representation of the decay rate constant k, which is 3.1%: k = 0.031.

T½ = ln(2) / k

T1+2=ln(2)/0.031 = 22.3 years

The radioactive element has a half-life of about 22.3 years.

Learn more about Radioactive element, refer to the link:

https://brainly.com/question/31865009

#SPJ12

After adding 10.0, 20.0 and 30.0 mL of 0.68 M NaOH to the 20.16 mL sample of 0.68 M HCl, the pH of the solution is approximately 0.163, 0.326 and 0.489 respectively.

A. After adding 10.0 mL of 0.68 M NaOH:

First, we need to calculate the number of moles of HCl initially present in the 20.16 mL sample.

Volume of HCl solution = 20.16 mL = 0.02016 L

Molarity of HCl solution = 0.68 M

Number of moles of HCl = Molarity × Volume

= 0.68 M × 0.02016 L

= 0.0137952 mol

Since the reaction between HCl and NaOH is 1:1, the number of moles of HCl remaining after the titration with 10.0 mL of 0.68 M NaOH will be equal to the number of moles of NaOH added.

Number of moles of NaOH added = Molarity × Volume

= 0.68 M × 0.0100 L

= 0.0068 mol

The total number of moles of HCl remaining = Initial moles of HCl - Moles of NaOH added

= 0.0137952 mol - 0.0068 mol

= 0.0069952 mol

Now, we can calculate the concentration of HCl remaining:

Volume of HCl remaining = Volume of HCl solution - Volume of NaOH added

= 20.16 mL - 10.0 mL

= 10.16 mL = 0.01016 L

Concentration of HCl remaining = Moles of HCl remaining / Volume of HCl remaining

= 0.0069952 mol / 0.01016 L

= 0.687 M

To calculate the pH, we can use the equation: pH = -log[H+]

Since HCl is a strong acid, it completely dissociates in water, and the concentration of H+ ions is equal to the concentration of HCl.

pH = -log(0.687)

= 0.163

After adding 10.0 mL of 0.68 M NaOH to the 20.16 mL sample of 0.68 M HCl, the pH of the solution is approximately 0.163.

B. Following the same calculations, after adding 20.0 mL of 0.68 M NaOH, the pH of the solution would be approximately 0.326.

C. After adding 30.00 mL of 0.68 M NaOH, the pH of the solution would be approximately 0.489.

To know more about pH , visit:

https://brainly.com/question/12609985

#SPJ11

The rate of reaction means how fast or slow(speed) a reaction occurs.

The correct answer is A: Trial 1, because the average rate of the reaction is lower.

The rate of reaction is the speed with which reactants are converted into products. It is also the rate at which reactants disappear and products appear.  The higher the rate of reaction, the greater the amount of product formed in a reaction.

If we look at the graph, we will realize that trial 1 produces a lesser amount of product than trial 2. This implies that the  average rate of the reaction in trial 1 is lower than in trial 2.

Lower average rate of reaction implies lower concentration of the reactants since the rate of reaction depends on the concentration of reactants.

Hence trial 1 has a lower concentration of reactants because the average rate of the reaction is lower.

https://brainly.com/question/14221385

The correct option is option A: Trial 1, because the average rate of the reaction is lower

The average rate of reaction increases as the concentration of reactants increases;

The rate of reaction increases as the concentration of reactants increases because the number moles of the reaction particles increases resulting in increased collisions among the reacting particles followed by an increase in the number of effective collisions to form the total possible number of the product at a shorter time which shows a higher reaction rate.

The higher the reaction rate, the steeper the slope of the graph of the Amount of Products to Time produced and, from the given graph, Trial 2 has a higher average rate of reaction and given that other factors were kept constant, a higher concentration of reaction, while, Trial 1 that has a gentler slope of Amount of Product to Time has a lower concentration of the reactant, and therefore, the average rate of reaction in Trial 1, is lower

Therefore, the statement that explains which trial has a lower concentration of the reactant is option A, Trial 1, because the average rate of the reaction is lower

There are 0.175 moles of potassium hydroxide in a 125 mL sample of a 1.40 M potassium hydroxide solution.

To determine the number of moles of potassium hydroxide in a 125 mL sample of a 1.40 M potassium hydroxide solution, we can use the following formula:

moles = concentration (in M) x volume (in L)

However, the volume given in the problem is in milliliters (mL), so we need to convert it to liters (L) by dividing by 1000:

125 mL = 125/1000 L = 0.125 L

Now we can substitute the values into the formula:

moles = 1.40 M x 0.125 L

moles = 0.175 moles

Click the below link, to learn more about Potassium hydroxide solution:

https://brainly.com/question/28726804

#SPJ11

The number of moles of chlorine in a 67.2 liter sample at STP (Standard Temperature and Pressure), is approximately 3 moles.

We need to use the ideal gas law and the molar volume of a gas at STP.

STP conditions are defined as a temperature of 273.15 Kelvin (0 degrees Celsius) and a pressure of 1 atmosphere (1 atm).

The molar volume of a gas at STP is approximately 22.4 liters/mol.

Given:

Volume of the sample = 67.2 liters

We can use the formula:

n = V / Vm

where:

n = number of moles

V = volume of the sample

Vm = molar volume at STP (22.4 liters/mol)

Now, let's calculate the number of moles:

n = 67.2 L / 22.4 L/mol

n ≈ 3 moles

Therefore, there are approximately 3 moles of chlorine in a 67.2 liter sample of chlorine at STP.

To learn more about moles refer here:

https://brainly.com/question/30885025#

#SPJ11

Answer:5

Explanation:

In order to demonstrate that intramolecular forces are stronger than intermolecular forces, a block of ice will be heated in a sealed container until it turns into steam.

Because the forces holding together compounds are stronger than the forces holding together molecules, intramolecular forces are stronger than intermolecular forces.

Intermolecular forces exist between molecules, but intramolecular forces exist between atoms within a molecule. This is the primary distinction between intermolecular and intramolecular forces.

Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.

Learn more about intramolecular forces at:

https://brainly.com/question/26096719

#SPJ1

The complete sentences are:

Page 3:

The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.

The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.

The complete sentences:

Page 4:

Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.

A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.

Find out more on matter here: https://brainly.com/question/3998772

#SPJ1

The mass of 3.35 mol of Hg(IO3)2 is 1,170 g. Therefore, none of the given options (1,700 g, 1,840 g, 1,960 g, 2,110 g) match the calculated value.

To determine the mass of 3.35 mol of Hg(IO3)2, we need to calculate the molar mass and multiply it by the number of moles.

The molar mass of Hg(IO3)2 can be calculated as follows:

Hg: atomic mass of Hg = 200.59 g/mol

(IO3)2: 2 x (I: atomic mass of I = 126.90 g/mol + 3 x (O: atomic mass of O = 16.00 g/mol) = 2 x (126.90 g/mol + 3 x 16.00 g/mol) = 2 x (126.90 g/mol + 48.00 g/mol) = 2 x 174.90 g/mol = 349.80 g/mol

Now, we can calculate the mass:

Mass = molar mass multiplied with number of moles

Mass = 349.80 g/mol x 3.35 mol = 1170.33 g

Rounded to the nearest gram, the mass of 3.35 mol of Hg(IO3)2 is 1,170 g. Therefore, none of the given options (1,700 g, 1,840 g, 1,960 g, 2,110 g) match the calculated value.

Learn more about moles at: https://brainly.com/question/29367909

#SPJ11

Answer:

its height relative to some reference point, its mass, and the strength of the gravitational field

Explanation:

Gravitational energy is the potential energy associated with gravitational force, such as elevating objects against the Earth’s gravity. The potential energy due to elevated positions is called gravitational potential energy.

The factors that affect an object’s gravitational potential energy are the following; its height relative to some reference point, its mass, and the strength of the gravitational field it is in. For instance, consider a wallet lying on a table, it has less gravitational potential energy than the same wallet lying on top of a taller cupboard, and yet lesser gravitational potential energy than a heavier wallet lying on the same table.

If an object lies at a certain height above the Moon’s surface, it has less gravitational potential energy than the same object lying at the same height above the Earth’s surface because the Moon’s gravitational force is weaker.

If you forgot to add phenolphthalein indicator solution to the vinegar in step 3, you wouldn't be able to accurately determine the endpoint of the titration.

Phenolphthalein indicator solution is added to the vinegar in step 3 to serve as an endpoint indicator for the titration. The indicator solution changes color from colorless to pink when all the acetic acid in the vinegar has reacted with the sodium hydroxide solution.

If you forgot to add the indicator solution, you wouldn't be able to accurately determine when the endpoint has been reached and you may end up adding too much of the sodium hydroxide solution, resulting in an inaccurate titration. This is because without the indicator, you won't be able to see the exact point when the acid and the base have neutralized each other, and so you wouldn't be able to stop the titration at the exact point required for accurate results. Therefore, adding the indicator solution is a crucial step in the titration process that must not be overlooked.

Learn more about titration here:

https://brainly.com/question/31271061

#SPJ11

aniapsmxuansyxineydo

Based on the percentage mass of magnesium oxide in the sample, the mass of Magnesium oxide in the sample is 0.42 g.

Magnesium is a metallic element with an atomic number of 12.

Magnesium is an important mineral that is used as a supplement s well as in drugs such as milk of magnesia.

Considering the given magnesium supplement:

1.02 g magnesium supplement contains 25.0% Mg by mass.

Magnesium is present in the supplement as magnesium oxide, MgO.

The molar mass of magnesium oxide, MgO = 40.30 g/mol

Molar mass of magnesium = 24.0 g

Percentage mass of Magnesium oxide in the sample = 40.3 / 24 * 25

Percentage mass of Magnesium oxide in the sample = 42%

Mass of Magnesium oxide in the sample = 42 % * 1.02

Mass of Magnesium oxide in the sample = 0.42 g

Learn more about percent mass at: https://brainly.com/question/17812901

#SPJ1

Absorbance is a measure of how much light a substance absorbs and is often used by chemists to determine the concentration of a solution.

This is because the absorbance of a substance is directly proportional to its concentration, if the molar absorptivity is known. The molar absorptivity is a property of the substance and is usually provided in literature or can be determined experimentally.

In this case, if the absorbance of a new blue dye solution is 0.96 and the molar absorptivity is known, the concentration of the solution can be calculated using the Beer-Lambert Law (A = ε * b * c). This law states that the absorbance (A) of a solution is equal to the product of the molar absorptivity (ε), the path length (b) of the cuvette, and the concentration (c) of the solution.

 Learn more about molar absorptivity here: brainly.com/question/28507245

#SPJ4