During an experiment, the percent yield of calcium chloride from a reaction was


80. 34%. Theoretically, the expected amount should have been 115 grams. What was


the actual yield from this reaction? (5 points)


CaCO3 + HCI - CaCl2 + CO2 + H2O


1) 90. 1 grams


2) 92. 4 grams


3) 109. 2 grams


4) 115. 3 grams

Answer:

216 K

Explanation:

T2=T1P2/P1

Change C to K

Answer:

warm

Explanation:

Answer:

i would help i just dont know sorry

Explanation:

Answer:

A.

Explanation:

because im smart

WebMO's IR frequencies for OH and C=O functional groups can be inaccurate due to limitations in empirical force fields, inadequate consideration of hydrogen bonding effects, and challenges in selecting appropriate levels of theory and basis sets.

IR frequencies calculated using the WebMO software package can be particularly inaccurate for OH (hydroxyl) and C=O (carbonyl) functional groups. This can be attributed to a few factors. Firstly, WebMO, like many other software packages, relies on empirical force fields to calculate molecular vibrations. These force fields are based on predetermined parameters and assumptions about bond lengths, angles, and force constants. While they work well for many functional groups, the complex nature of OH and C=O vibrations may not be accurately captured by these force fields.

Secondly, OH and C=O groups exhibit strong hydrogen bonding interactions, which can significantly affect their vibrational frequencies. However, the empirical force fields used by WebMO may not fully account for these hydrogen bonding effects, leading to inaccuracies in the calculated IR frequencies.

Furthermore, the accuracy of IR frequency calculations can also depend on the level of theory chosen and the basis set used in the calculations. Different levels of theory and basis sets have varying degrees of accuracy and computational cost, and choosing the appropriate combination for accurate OH and C=O vibrational frequencies can be challenging.

In conclusion, the inaccuracies in WebMO's IR frequencies for OH and C=O functional groups can be attributed to the limitations of empirical force fields, the inadequate consideration of hydrogen bonding effects, and the challenges in selecting appropriate levels of theory and basis sets.

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The number of mole present in the aluminum foil, given that the foil has a thickness of 1.0 mm is 0.7 mole

We'll begin by obtaining the mass of the aluminum foil. Details below:

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of aluminum = 2.702 × 7

Mass of aluminum = 18.914 g

Finally, we shall determine the number of mole present. Details below:

Mole = mass / molar mass

Number of mole of aluminum = 18.914 / 27

Number of mole of aluminum = 0.7 mole

Thus, the number of mole is 0.7 mole

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During the evaporation process, liquid components separates from the solid components

Evaporation process means the change liquid water to gaseous water called evaporation and during evaporation process the soluble solid can be separated from its liquid component by allowing the liquid component to evaporate either by its own or by heating and also during evaporation the liquid component is lost to the atmosphere  and the solid remains behind

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Lab Procedure for Preparing Five Sucrose Solutions Ranging from 10% to 1% includes the materials and procedures.

Materials:

5 beakers or graduated cylinders

5 different sizes of plastic or glass pipettes

Distilled water

Sucrose

Graduated cylinder

Digital balance

Stirring rod or spoon

Measuring spoon

Lab label

Procedure:

Label five beakers or graduated cylinders with the desired sucrose concentration (10%, 9%, 8%, 7%, and 1%) and set them aside.

Using a graduated cylinder, measure out 100 mL of distilled water and pour it into the beaker labeled 10%.

Weigh the appropriate amount of sucrose needed to make a 10% solution, using a digital balance. For example, for 100 mL of water, 10 g of sucrose is needed.

Add the weighed sucrose to the beaker with distilled water and stir until it dissolves. Repeat this process for each successive concentration (9%, 8%, 7%, and 1%) using smaller and smaller amounts of sucrose and making sure to stir until each is fully dissolved.

For each solution, measure 10 mL using a different size of pipette and transfer it to a new labeled beaker.

Repeat the transfer of 10 mL of each solution to new labeled beakers until you have 5 beakers with 10 mL of each solution.

Note: To accurately measure the volume of the solutions, it is important to use calibrated pipettes. Make sure to label each beaker with the corresponding sucrose concentration, date, and your name for proper identification.

This lab procedure will produce five solutions with sucrose concentrations ranging from 10% to 1% in increments of 1%. The solutions can be used for various experiments or assays that require different sucrose concentrations.

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The number of phases that exist in equilibrium in a system depends upon the variables like temperature, pressure and composition. Here at 1 atm pressure water is in solid phase. The correct option is D.

The phase equilibria studies are made simpler by the use of plots which show how the various equilibria depend on the temperature, pressure and composition variables. These diagrams are called phase diagrams.

Here the pressure 1 atm on y-axis coincides with the temperature -5°C on x-axis. The water system is a one component system. So the water is in solid phase.

Thus the correct option is D.

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Answer:

No, I believe it's not balanced, srry if I got it wrong for you

The various field of science include the following;

1. Serology.

2. Bioinformatics.

3. Toxicology.

4. Biotechnology.

5. Genetics.

6. Epigenomics.

7. Biochemistry.

8. Taphonomy.

Science is the interest and application of information and understanding of the normal and social world taking after a precise strategy based on prove.

1. Serology: The study of blood.

2. Bioinformatics: The development of digital storage and technology for use in bioscience applications.

3. Toxicology: The study of poisons.

4. Biotechnology: The study and use of biological structures and processes for industrial purposes.

5. Genetics: The scientific study of heredity.

6. Epigenomics: The study of the effects and interaction of the expression of genes.

7. Biochemistry: The study of the chemistry of organisms.

8. Taphonomy: The study of decomposition of bodies after death.

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Explanation:

The ice melting would make more water because ice is water and if it melts it make water.

hope this helps :)

Answer: Your answer is Its signal sequence must target it to the ER, after which it goes to the Golgi.

Hope this helps!

Answer:

Explanation:

16. 12

17. 8

18. 9

19. 10

20. 5

21. 15

22.8

23. 24

24. 12

25. 3 i guess( some one comment for 25th pls)

26. 2

The amount of radioactive sample after 2.5 days is 0.00127 g.

Half-life is the time require for half the sample of a radioactive material to decay

To calculate the amount of radioactive sample left after 2.5 days, we use the formula below.

Formula:

⇒ Where:

From the question,

⇒ Given:

Substitute these values into equation 1

Hence. the amount of radioactive sample after 2.5 days is 0.00127 g.

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1) p=52

2)p=e=52

52-4=48

128

Answer:

Units of the concentration of the reactant and unit of time.

The reaction order with respect to reactant A is m.

Explanation:

The information from the exercise is:

• The axes of the graph:

• The rate formula:

From the rate equation we can see that the reaction order with respect to reactant A is m.

So, the additional information required is the units of the concentration of the reactant and the unit of time, because the constant k is the slope of the graph.

Answer:

10 must be added

Explanation:

Vapor pressure is defined as the amount of pressure that is exerted by a vapor present over a liquid or solid.

It is determined by the number of gas particles that are present over the surface of the liquid or solid. When the number of gas particles increases, the vapor pressure increases.

It increases with the increase in temperature and decreases with the decrease in temperature.

The strength of the intermolecular forces for a substance is another important factor that influences the vapor pressure of the substance.

Stronger intermolecular forces result in less vapor pressure, while weaker intermolecular forces result in more vapor pressure.

For example, if we compare two different molecular substances with each other, one has strong intermolecular forces, while the other has weak intermolecular forces. The substance with stronger intermolecular forces will have a lower vapor pressure than the substance with weaker intermolecular forces.

Therefore, the vapor pressure of a given molecular substance is affected by changes in temperature and by the strength of the intermolecular forces for the substance.

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Chemical chemical X. The silicon is available. This information is not given here. Therefore, we shall use the atomic number as the amount of protons. So, the solution is 17.

A proton, a quasiparticle, is found in the nucleus of every atom.. The particle has an electrical charge that is positive and opposite to the electron's. A single proton would weigh just 1.673? 10-27 kilos if it were isolated, which is only a little bit less than a neutron.

A subatomic particle with a negative charge is an electron. A proton is an unit of matter with the a positive charge. Protons are bound together in an atom's nucleus by the potent nuclear energy. The neutron is a type of subatomic particle sans charge (they are neutral).

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When you get into a car that has been sitting in the sun for a while, there are several noticeable things that may occur. Here are some of the common observations:

1. Heat: One of the first things you'll notice is the intense heat inside the car. This is because the sun's rays have been absorbed by the car's exterior and trapped inside, creating a greenhouse effect. The temperature inside the car can become significantly higher than the temperature outside.

2. Hot Surfaces: The surfaces inside the car, such as the seats, dashboard, steering wheel, and metal parts, can become extremely hot to the touch. This is due to the absorption of heat from the sun. It's important to be cautious and avoid direct contact with these hot surfaces to prevent burns or discomfort.

3. Odor: The interior of the car may have a distinct smell when it has been sitting in the sun for a while. This is often referred to as the "hot car smell." It is caused by the combination of materials, such as upholstery, plastic, and carpet, heating up and emitting a specific odor.

4. Fading or Discoloration: Prolonged exposure to sunlight can cause fading or discoloration of materials inside the car. For example, the upholstery, dashboard, and other surfaces may gradually lose their original color and become faded or discolored over time.

5. Glare: When you first enter a car that has been sitting in the sun, you may notice a strong glare from the sunlight reflecting off the windshield and other glass surfaces. This glare can make it difficult to see clearly and may require the use of sunglasses or adjusting the sun visors to minimize the brightness.

It's important to note that these observations may vary depending on factors such as the intensity of the sunlight, the duration the car has been in the sun, and the materials used in the car's interior. Regular maintenance and taking precautions, such as using sunshades or parking in shaded areas, can help minimize some of these effects.

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By first vaporising the component and then condensing the vapour back into a liquid form, distillation purifies a compound.

The fundamental idea underpinning distillation is that different liquid mixtures may be distinguished by the difference in their boiling points. When a liquid's vapour pressure reaches atmospheric pressure, that temperature is known as the boiling point. This technique divides liquids into volatile and non-volatile categories.

It is then boiled after being placed in the RB flask. The more volatile or lower boiling point component evaporates more quickly and is collected in a different container. Condensation is accelerated with the aid of a condenser.

For instance, distillation can be used to separate a chloroform and aniline mixture. Aniline has a boiling point of 189°C while chloroform has a boiling point of 60°C. Thus, a mixture of chloroform and aniline can be separated by distillation.

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Answer:

a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

Explanation:

Answer:

a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

Explanation:

Answer:

4. c) Lose only 3 electrons

5. d) Nitrogen.

Your answers are correct

The molarity equation is as follows: Molarity is defined as moles of solute/liters of solution.

You can calculate the number of moles of solute if you know the molarity (concentration) of a solution and the total volume of the solution (be sure it is in liters). Afterward, you might need to convert the solute's moles to grams.

By percent by mass is another way for estimating the solute concentration in a solution. To do this, an equation of the form

The formula for mass percent is (mass of solute/mass of solution) X 100.

Percent by volume is a third technique for estimating the solute concentration in a solution. The formula for this is:

(Volume of Solute/Volume of Solution) X 100% is the formula for percent by volume.

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The granite block transferred 2052.88 joules of energy and the mass of the water is 19.84 grams.

Apply the idea of energy conservation to calculate the amount of energy that was transferred from the granite block to the water. The energy obtained by the water will be equivalent to the energy lost by the granite block.

Firstly, determine the energy lost by the granite block:

\(\rm \Delta Q_{granite} = mass_{granite} \times specific\ heat_{granite} \times \Delta T_{granite}\)

In which:

\(mass_{granite}\) = 126.1 grams (mass of the granite block)

\(\rm specific\ heat_{granite}\) = 0.795 joules/gram degree Celsius (specific heat capacity of granite)

\(\rm T_{granite}\) = final temperature - initial temperature

Given:

initial temperature = 92.6°C

final temperature = 51.9°C

ΔT = 51.9°C - 92.6°C = -40.7°C

ΔQ = 126.1 g × 0.795 J/g°C × (-40.7°C)

ΔQ = -2052.88 J

The negative sign represent that the granite block loses energy.

Due to the conservation of energy, the energy received by the water will be equal to that lost by the granite block in magnitude but will be of the opposite sign:

\(\rm \Delta Q_{water}\)= -  \(\rm \-\Delta Q_{granite}\)

\(\rm \Delta Q_{water}\) = 2052.88 J

Thus, the granite block transferred 2052.88 joules of energy.

To determine the mass of the water,  use the following equation:

\(\rm \Delta Q_{water}\) = mass of water × specific heat of water × ΔT of water

In which:

mass of water = to find

specific heat of water = 4.186 joules/gram degree Celsius (specific heat capacity of water)

ΔT of water = final temperature of water - initial temperature ofwater

initial temperature = 24.7°C

final temperature = 51.9°C

ΔT of water = 51.9°C - 24.7°C = 27.2°C

Substitute the values:

2052.88 J = mass of water × 4.186 J/g°C × 27.2°C

To solve for mass of water:

mass of water = 2052.88 J / (4.186 J/g°C × 27.2°C)

mass of water = 19.84 grams

Thus, the mass of the water is 19.84 grams.

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