Question 28 (2 points)
Which of the following is part of the Kinetic Molecular Theory?
1) gases consist of tiny particles that are close together
2) gas molecules are in constant random motion
3) Il of the above are part of the Kinetic Molecular Theory
4) the average kinetic motion of gas molecules decreases with an increase in
temperature
Marook nie

The molecular mass of a compound is the sum of the atomic masses of all the atoms in a molecule. It is calculated by adding up the atomic masses of each element in the compound, as indicated by its molecular formula.

On the other hand, the formula mass is the sum of the atomic masses of all the atoms in a formula unit of an ionic compound. It is calculated in a similar manner as the molecular mass, but instead of using the molecular formula, we use the empirical formula or the simplest ratio of elements in the compound.

To differentiate between the two, molecular mass is used for covalent compounds, where atoms are held together by covalent bonds, while formula mass is used for ionic compounds, where ions are held together by ionic bonds.

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Answer:

The closest shell to the nucleus is called the "1 shell" (also called the "K shell"), followed by the "2 shell" (or "L shell"), then the "3 shell" (or "M shell"), and so on farther and farther from the nucleus.

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Answer:

b

Explanation:

Explanation:

.........................

Kitchen Math: Measuring

1. By understanding how to measure ingredients, time and temperature,

you take the guesswork out of cooking.

2. The two scales for temperature are Fahrenheit and Celsuis.

3. The three times to wash when cooking are: A. before cooking

B. during cooking

C. after handling of food

4. The three kinds of measurement are

A. estimated

B. ratio

C. calibrated measurement

5. Estimated measurement is great for foods such as soup.

6. Ratio cooking compares the amount of one ingredient to another

ingredient.

7. The most common kind of kitchen measurement in America is the English system.

8. One quart is almost a liter.

9. The metric system is based on tens.

Kitchen Math 3

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10. Measuring tools you find in almost every kitchen are timers, thermometers and measuring containers.

11. Water freezes at 32 Fahrenheit and 0° Celsius. Water boils at 212" Fahrenheit and 100° Celsius.

12. When measuring dry ingredients, you want to dip, scoop and scrape.

13. If your recipe calls for sifted flour, sift it before you measure.

14. Brown sugar, cooked rice and chopped parsley need to be packed down in measuring cups

15. When measuring liquids, get down at eye level.

16. Measuring spoons are used for both liquid and dry ingredients.

17. Use the back of a knife to scrape off dry ingredients when using a measuring spoon,

18. Taring is when you allow for the weight of a container or wrapper.

19. Dry ingredients do not weigh the same as wet ingredients.

20. A large egg weighs about 2 ounces.

21. Turn pancakes when you see bubbles on the top.

In double replacement reactions, the two metals will not combine with each other when products are formed because the atoms of metals contain less than half the full complement of electrons in their outermost shell.

This is referred to as a type of reaction in which the positive and negative ions of two compounds exchange places to form two new products or substances.

The two metals will not combine with each other when products are formed because of their atoms having less than the required electrons which is needed to complement those in the outermost shell.

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Decanting the sample onto the center of a filter paper after assembling the filtering device for an organic combination to start the separation process.

To transfer (a water, like wine) from one container into another by drawing out the liquid without upsetting the sediment or perhaps the lower layers before the meal, the wine was decanted. to move, unload, or pour out something.

Oil and Water: On water, oil floats. After allowing an oil / water mixture to settle for a while, the oil can be poured off of the water. A separatory funnel can be used to separate the water and oil. Cleansing murky water with decantation is one method.

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The limiting reactant, theoretical yield ( in kg) and the percent yield: 89.5%.

The limiting reactant is the reactant that is completely consumed and limits the amount of product formed. To determine the limiting reactant, we need to calculate the amount of Ti produced by each reactant assuming they are limiting.

Using stoichiometry, we can convert the masses of C and TiO2 to the mass of Ti produced:

For C: 28.6 kg C x (1 mol C / 12.01 g C) x (1 mol Ti / 2 mol C) x (47.87 g Ti / 1 mol Ti) = 55.9 kg Ti

For TiO2: 88.2 kg TiO2 x (1 mol TiO2 / 79.87 g TiO2) x (1 mol Ti / 1 mol TiO2) x (47.87 g Ti / 1 mol Ti) = 47.8 kg Ti

Therefore, TiO2 is the limiting reactant.

The theoretical yield is the amount of product that would be produced if all of the limiting reactant reacted completely. The theoretical yield of Ti is 47.8 kg. The percent yield is the actual yield (the amount of product produced in the experiment) divided by the theoretical yield, multiplied by 100%.

Percent yield = (42.8 kg Ti / 47.8 kg Ti) x 100% = 89.5%

Therefore, the limiting reactant is TiO2, the theoretical yield of Ti is 47.8 kg, and the percent yield is 89.5%.

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Complete question:

we can obtain titanium metal from its oxide according to the following balanced equation:

TiO2 + 2C >> Ti + 2CO

when 28.6 kg of C reacts with 88.2 kg of TiO2, 42.8 kg of Ti is produced.

Find the limiting reactant, theoretical yield ( in kg) and the percent yield.

Heterogeneous 'mixtures' (because they don't meet the definition  of mixtures) are mixtures substances that aren't completely uniformly spread out. They haven't reacted with the solvent to become a solution.

Explanation: There are 2 types of heterogeneous solutions, A Colloid and a suspension.

Colloid: You can check if a mixture is heterogeneous by passing a light ray through it. This may cause the Tyndall effect (If the mixture is a colloid) when the Colloidal Heterogeneous mixture's particles are so small that they refract the beam of light and the path of light will be visible, like if you add 3 drops of milk in a glass of Water and shine a laser light through it. This is because the particles are too small to be seen by the unaided eye but big enough to scatter you laser light. However that particles won't settle down or will be separated by a filter paper due to particles' small size.

Suspension: A solution will be a solution when the particles of the Mixture is big enough to be seen by the unaided eye. Like if you mix sand and Water, the sand will eventually settle down due to Gravity. The mixture's solute will be big enough to pass through a filter paper.

Answer:

Pressure= 2 atm

temperature= 273K

volume= 44.8cm

3

=44.* litre

so,By PV=nRT

n=

RT

PV

mole=

0.0821×273

2×44.8

so, no of moles= 3.998=4

hence, 4×6.023×10

23

=24.08×10

23

Explanation:

if this answer is correct make me as brainlelist

At STP, one mole of every elements or molecules contains a volume of  22.4 L. Hence, a volume of 44.8 L of oxygen gas is 2 moles thus weighs 64 g.

STP is the condition of standard temperature and pressure.  A temperature of 298 kelvin and 1 atm pressure is referred to as standard temperature and pressure or STP.

At standard temperature and pressure, one mole of every compound or molecule contains 22.4 liters of the substance. We know that one mole of O₂ gas is 32 g/mol. 32 g of oxygen gas contains 22.41 liters.

The number of moles of 44.8 liters of oxygen is = 44.8/22.4 = 2 moles.

One mole of oxygen gas is 32 g. Hence, 2 moles are 64 g. Hence, the mass in grams of 44.8 oxygen is 64 g.

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Answer:

A-Red and blue marbles in the same container.

Explanation:

(Apex)

Explanation:

its b cz the gain electrons i think

Answer:

1. Fr

2. cl

3.H20

4.2 mole

5. 3

6. c

Because the nucleus can't hold the 18 electrons in the Cl- ion as tightly as the 17 electrons in the neutral atom, the negative ion is significantly larger than the atom from which it forms. For the same reason, positive ions should be smaller than the atoms from which they are formed.

At 1911 ° C temperature will He atoms have the same the root mean square speed as N2 at 25°C

According to formula of rms speed

\(U_{rms}\) = \(\sqrt{\frac{3RT}{M} }\)

\(U_{rms}\) = (N2) = \(U_{rms}\) (He)

\(\sqrt{\frac{3RT}{28} }\) =  \(\sqrt{\frac{3R 273}{4} }\)

T = 273 x 28 / 4 = 1911 °C

The square root of temperature and the square root of the molar mass are both directly proportional to the rms velocity. Thus, doubling the rms velocity of the molecules when the temperature of a given gas is quadrupled. The arithmetic mean of the velocity of individual particles or molecules is known as Average velocity, while the root mean square velocity is defined as the square root of the mean square of the velocity of individual particles or molecules. The average speed of an object on a particular axis is known as the rms velocity.

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Answer:

The correct option is A: "He is trying to increase his accuracy but not his precision"

Explanation:

Accuracy of measurement is when the value of the measurement is close to the actual value of that measurement while precision is when the experiment is repeated using the same instrument but obtaining different values.

When Boyd changed the weighing balance in his experiment to a smaller one, the smaller weighing balance has better accuracy (smaller graduations) than the initially used one because the smaller weighing balance will provide a value close to the actual value of the mass of the product. If he had, however, repeated the experiment without changing the weighing balance, he would have sought to increase his precision.

From the description above, it can be said that Boyd was trying to increase his accuracy but not his precision

Answer:

The correct option is A: "He is trying to increase his accuracy but not his precision"

Explanation:

right on EDGE 2021

A smaller amount of energy is wasted by the incandescent bulb.

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The molecule geometry of the given arrangement is C. square planar.

In the square planar geometry, the central atom has four atoms bonded to it and two lone pairs on opposite sides. This arrangement forms a flat, square shape, with the atoms and lone pairs positioned at the corners of the square. The bond angles in a square planar molecule are approximately 90 degrees.

This geometry occurs when the central atom belongs to the d²sp³ hybridization, which means it utilizes two d orbitals, one s orbital, and three p orbitals to form six hybrid orbitals. The four atoms bonded to the central atom occupy four of the hybrid orbitals, while the two lone pairs occupy the remaining two hybrid orbitals.

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Since I2 was larger with more electrons, it has greater forces than N2, that is also nonpolar and only has London dispersion forces.

What is hydrogen used for?

Fuel cells may produce energy, power, and heat using hydrogen. The two industries where hydrogen is currently most widely employed are fertilizer manufacturing and petroleum refining, with the developing markets of utilities and transportation.

Can you drink hydrogen water?

Experts disagree whether consuming hydrogen water has any hazards. However, they were unsure if its advantages outweigh those of drinking regular water or being hydrated in general. Hypovolemia, which can be fatal, can result from excessive water intake.

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Answer:

It’s B: Monomers are forming large polymers

Explanation:

Answer:

B. Monomers are forming large polymers.

Explanation:

Answer:kinetic

Explanation:

Thank

Answer:

B.

Explanation:

The block has potential energy.

Answer:

Answer:

C3H6O + 4O2 → 3CO2 + 3H2O

Explanation:

I think that's the answer

Hope this helps :)

Answer:

A

Explanation:

The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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If the same experiment were performed at 125°C, the pressure in the tank would be approximately 6.68 atm.

To determine the pressure in the tank at 25°C, we need to apply the ideal gas law, which states:

PV = nRT

where:

P is the pressure,

V is the volume,

n is the number of moles of gas,

R is the ideal gas constant (0.0821 L·atm/(mol·K)),

T is the temperature in Kelvin.

Given that the initial pressure of hydrogen gas is 2.00 atm and the initial pressure of oxygen gas is 3.00 atm, the total initial pressure in the tank is:

P_total = P_H2 + P_O2

= 2.00 atm + 3.00 atm

= 5.00 atm

Since the number of moles and volume of the gases are not given, we cannot determine the exact pressure at this point.

Now, let's consider the scenario where the temperature is 125°C (which is 398 K). We can use the combined gas law to find the new pressure:

P1V1 / T1 = P2V2 / T2

Substituting the given values:

P1 = 5.00 atm

T1 = 25°C = 298 K

T2 = 125°C = 398 K

P2 = (P1 * V1 * T2) / (V2 * T1)

Since the volume of the container remains constant (20.0 L), we can simplify the equation:

P2 = (P1 * T2) / T1

= (5.00 atm * 398 K) / 298 K

≈ 6.68 atm

Therefore, if the same experiment were performed at 125°C, the pressure in the tank would be approximately 6.68 atm.

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