How many moles are in 1.25 x 1021 molecules of sucrose?
How many moles of aspartame are present in 197 g of aspartame, C14H18N2O5?

Answer:

The mass of 1 atom of silver is 1.79 x 10-22g.

nswerllo

Explanation:

Answer:

10 moles of O2

Explanation:

Balanced Equation:

CH4 + 2O2=CO2+2H2O

Now,

According to Stoichiometry,

In the reaction,

           1 mole CO2 is produced by 2 moles of O2

∴5 moles of CO2 is produced by (2 X 5) moles of O2

                                                       = 10 moles of O2

Therefore, to produce 5 moles of CO2, 10 moles of Oxygen is needed.

Answer:

The global movement of air occurs in convection cells. What reasoning explains how air moves, in general? Based on the direction from which they are blowing. Winds are named based on different factors.

Explanation:

Answer: c

Explanation:

LEAST TO MOST POLAR- hexane,diethyl ether,acetone,n-propanol,water ,methanol

Considering the problem  we can say that the kids are compared to be more polar or smaller molecular weight compounds. The more polar compounds interact with silica more just as the kids bus stopped at every point and reached the destination late. Whereas, the adult bus is compared to be less polar compounds or high molecular weight which interacts less and reaches the destination faster.

Thus more polar compounds reaches the destination late whereas less polar compound reaches first.

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Answer:

I don't know that anwser sorry

Answer: Cyclohexylamine is a stronger base than aniline because in aniline electron pair is involved in conjugation, which makes the electron pair unavailable, where as in cyclohexyl amine, the −NH

2

​

 group is out side the ring and there is no resonance in the ring also, thereby the lone pair present on the nitrogen is freely available, resulting in a stronger base.

Explanation: I dont have one...

a. The mole fraction of hexane in the liquid mixture that boils at 350 k at a pressure of 1 atm is 1.28 x \(10^{-1}\).

b. The mole fraction of hexane in the vapor that is in equilibrium with the liquid of part a) is 6.03 x \(10^{-1}\), which is about 4.7 times larger than the mole fraction of hexane in the liquid.

a) To calculate the mole fraction of hexane in the liquid mixture that boils at 350 K and 1 atm, we can use Raoult's law, which states that the vapor pressure of a component in a solution is proportional to its mole fraction in the solution. At 350 K, the total vapor pressure of the solution is 1 atm. Therefore, the mole fraction of hexane in the liquid can be calculated as:

P_hexane / P_total = X_hexane

X_hexane = P_hexane / P_total

X_hexane = 1.30 x \(10^5\) Pa / (1 atm x 101325 Pa/atm)

X_hexane = 1.28 x \(10^{-1}\)

b) The mole fraction of hexane in the vapor that is in equilibrium with the liquid of part a) can be calculated using Dalton's law of partial pressures, which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each component in the mixture. At equilibrium, the partial pressure of hexane in the vapor is equal to its vapor pressure at 350 K, which is 1.30 x \(10^5\) Pa. The partial pressure of toluene in the vapor can be calculated as:

P_toluene = P_total - P_hexane

P_toluene = 1 atm - 1.30 x \(10^5\) Pa / 101325 Pa/atm

P_toluene = 8.40 x \(10^{-1}\) atm

The mole fraction of hexane in the vapor can now be calculated using the partial pressures:

P_hexane / P_total = X_hexane

X_hexane = P_hexane / (P_hexane + P_toluene)

X_hexane = 1.30 x \(10^5\) Pa / [(1.30 x 10^5 Pa) + (8.40 x \(10^{-1}\) atm x 101325 Pa/atm)]

X_hexane = 6.03 x \(10^{-1}\)

Therefore, the mole fraction of hexane in the vapor that is in equilibrium with the liquid of part a) is 6.03 x \(10^{-1}\), which is about 4.7 times larger than the mole fraction of hexane in the liquid.

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A liquid nitrogen tank is commonly used in animal agriculture for several purposes, Semen Storage: Liquid nitrogen is used to preserve and store animal semen.

Semen from superior male animals can be collected and cryopreserved in liquid nitrogen at extremely low temperatures (-196°C or -320.8°F). This allows for long-term storage and enables the distribution of genetic material for artificial insemination (AI) programs. The low temperature of liquid nitrogen effectively stops all biological activity, preserving the viability of sperm cells.

Embryo Cryopreservation: Liquid nitrogen is utilized for the cryopreservation of embryos. In livestock breeding programs, embryos are collected from high-quality females and preserved for later transfer to recipient animals. The embryos are carefully frozen in liquid nitrogen to maintain their viability until they are ready for implantation into surrogate mothers.

Tissue Preservation: In some cases, animal tissues, such as ovaries or testes, are collected for preservation and future use. These tissues may contain valuable genetic material or be used for research purposes. Liquid nitrogen provides the extremely low temperatures necessary to freeze and store these tissues for extended periods without degradation.

Veterinary Medicine: Liquid nitrogen is also utilized in veterinary medicine for various procedures.

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Answer:

The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth's density is 5.51 grams per cubic centimetre.

Explanation:

In this closed rigid system, the partial pressure exerted by the neon gas is 1.6 atm.

To find the partial pressure exerted by the neon gas in a closed rigid system containing 7.0 mol CO₂, 7.0 mol Ar, 7.0 mol N₂, and 4.0 mol Ne, with a total pressure of 10.0 atm, we'll use Dalton's Law of Partial Pressures.

Step 1: Calculate the total number of moles of all gases present.
Total moles = moles of CO₂ + moles of Ar + moles of N₂ + moles of Ne
Total moles = 7.0 + 7.0 + 7.0 + 4.0
Total moles = 25.0 moles

Step 2: Determine the mole fraction of neon gas.
Mole fraction of Ne = moles of Ne / total moles
Mole fraction of Ne = 4.0 / 25.0
Mole fraction of Ne = 0.16

Step 3: Calculate the partial pressure of neon gas.
Partial pressure of Ne = mole fraction of Ne * total pressure
Partial pressure of Ne = 0.16 * 10.0 atm
Partial pressure of Ne = 1.6 atm

In this closed rigid system, the partial pressure exerted by the neon gas is 1.6 atm.

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Darwin proposed that natural selection leads to evolution over a long period, while other scientists had different mechanisms or beliefs.

Charles Darwin, an eminent biologist, naturalist, and geologist, is renowned for his theory of evolution and the concept of natural selection.

His groundbreaking ideas revolutionized the scientific community. Darwin's theory differs from other scientists' studies on natural selection in several ways:

1. Darwin proposed that natural selection leads to evolution, a gradual and slow process occurring over an extended period.

He postulated that certain traits are inherited and can impact an organism's survival in a specific environment. These changes accumulate over millions of years, resulting in the evolution of species.

According to Darwin, the fittest organisms that adapt well to their environment have a higher chance of survival and reproduction.

2. Darwin's theory challenged the prevailing belief of creationism, which asserted that all living beings were created in their present form.

Many scientists and religious leaders of the time rejected the concept of evolution, advocating instead for the unique and separate creation of each species.

Creationism failed to explain the diversity of life and the evidence found in the fossil record.

3. Darwin's theory introduced the mechanism of natural selection as the driving force behind evolution, distinguishing it from alternative theories.

For instance, Lamarck proposed the inheritance of acquired traits, while Darwin emphasized the inheritance of only innate traits.

This distinction was significant in shaping the understanding of evolutionary processes.

Darwin's theory of evolution laid the foundation for further scientific advancements, including Gregor Mendel's discovery of the principles of inheritance,

Which further refined our understanding of how traits are passed down through generations.

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The percentage of xenon in XePtF6 is 28.39%.

XePtF6 consists of one xenon atom, one platinum atom, and six fluorine atoms. To calculate the percentage of xenon in the compound, we need to find the molar mass of xenon and the molar mass of the whole compound.

The molar mass of xenon is 131.29 g/mol (from the periodic table). The molar mass of the whole compound can be calculated by adding the molar masses of each element:

(131.29 g/mol for Xe) + (195.08 g/mol for Pt) + (6 x 18.99 g/mol for F) = 440.37 g/mol

To find the percentage of xenon in the compound, we divide the molar mass of xenon by the molar mass of the compound and multiply by 100:

(131.29 g/mol / 440.37 g/mol) x 100% = 28.39%

The percentage of xenon in XePtF6 is 28.39%.

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Glucose concentration causes yeast to produce more fermentation, but when the saturation gradient is reached, carbon dioxide production stops.

Chemical processes happen when atoms create or dissolve chemical bonds. Products are the molecules that are produced as a result of a chemical reaction, whereas reactants are the ingredients that initiate one.

A chemical reaction happens when one or more substances change into one or more new substances. Consider the rust that results from the reaction between iron and oxygen. When vinegar & baking soda are mixed, sodium acetate, nitrous oxide, or water are the results.

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Answer:

a new scientific discovery that benefits the environment

Specific heat capacity if the unknown metal is -0.450 J/(g°C).

The measure of heat complexity needed to increase the temperature of a single unit of substance mass by one degree Celsius is known as specific heat capacity. This factor is crucial in determining how much energy is required for temperature changes in a given substance.

q = mcΔT

where q is the change in thermal energy, m is the mass of the metal, c is its specific heat capacity, and ΔT is the change in temperature.

In this case, we have:

m = 150 g

ΔT = 22.4°C - 12.6°C = 9.8°C

q = -662 J

Plugging in the values,

-662 J = (150 g) c (9.8°C)

Solving for c, we get:

c = -662 J / (150 g × 9.8°C) = -0.450 J/(g°C)

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Answer:

Explanation:

Enzyme activity is affected by the increase in temperature.

enzyme activity is also affected by the change in ph.

enzyme activity is also affected when substrate concentration is not increased in a chemical reaction.

Based on your observations, enzyme activity is affected by the increase in temperature.Enzyme activity is also affected by the change in pH.

Observations are defined as a set of statements or facts which are recorded while conducting an experiment.Observations are made through sensing changes in the variables of the experiment.

It is specifically defined as an act of knowing or recording the changes in the variables of the experiment.Recording observations holds importance as recording observations avoid the experiment to be repeated over and over again.

It is important to note down observations so that the testing of hypothesis is made easier.There are four types of observations .Observations need to be descriptive and must be written in complete sentences and should include all the numerical data of the experiment.

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No, a gas can never have zero volume. Even if it has no pressure and the lowest possible temperature (-273.15°C), it will still occupy some space.

A gas is a state of matter that lacks a fixed shape and volume, meaning that it can change shape and occupy the entire volume of its container. Furthermore, its molecules are spaced out and move quickly, freely, and randomly in all directions.Gas law to support the hypothesis

As per Gay-Lussac's Law of Gases, there are no gases with zero volume. According to the law, when the volume of a gas is decreased at a constant temperature, its pressure increases proportionally. It implies that the gas molecules cannot be compressed into a zero-volume state. Even when subjected to the lowest possible temperature and pressure, the gas particles will still occupy some space.

The temperature of the gas would have to be reduced to absolute zero (-273.15°C), which is unattainable, to come close to zero volume.

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Answer: Either b or c or d. More information is needed to answer the question.

Answer:

\(\boxed {\boxed {\sf 1, 242 \ N}}\)

Explanation:

According to Newton's Second Law of Motion, force is the product of mass and acceleration.

\(F=ma\)

In this formula, F is the force, m is the mass, and a is the acceleration.

The mass of the object is 540 kilograms and the acceleration is 2.3 meters per second squared.

Substitute the values into the formula.

\(F=(540 \ kg)(2.3 \ m/s^2)\)

Multiply.

\(F=1242 \ kg*m/s^2\)

Conver the units. 1 kilogram meter per second squared is equal to 1 Newton. Therefore, our answer of 1242 kilogram meters per second square is equal to 1242 Newtons.

\(F= 1242 \ N\)

The force of the object is 1242 Newtons.

Based on the recipe for preparing the food, the limiting ingredient is the 2 cans of tomatoes.

The recipe for the food is given below:

Hence, 2 cans of diced tomatoes require 1 cup of green beans, 1/2 cup of pasta, 1 can of beans, and 4 of cups broth.

Hence, after, the 2 cans of diced tomatoes are used up, no more food can be prepared.

A limiting reagent or limiting ingredient is used up when cooking, hence, the 2 cans of tomatoes are the limiting ingredient.

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There are approximately 1 x 10^23 He atoms in a balloon containing 1/6 mol Helium.

To answer this question, we first need to understand what a mole is. A mole is a unit of measurement used in chemistry that represents the amount of substance in a system. One mole of any substance contains 6.02 * 10^{23} particles, which is known as Avogadro's number.
In this case, we have a balloon containing 1/6 mol He. This means that there are 1/6 * 6.02 * 10^{23} He atoms in the balloon. Simplifying this, we get:
1/6 * 6.02 * 10^{23} = 1.0033 * 10^{23}
Therefore, there are approximately 1 x 10^23 He atoms in the balloon.

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complete question:

I have a balloon containing 1/6 mol He. How many He atoms are in the balloon?

a) 10^23

b) 4 million

c) 0.01

d) 1 x 10^21

The chemical equation for the synthesis reaction of burning magnesium in the presence of oxygen can be summarized as: 2 Mg + O2 → 2 MgO

In this reaction, magnesium (Mg) reacts with oxygen (O2) to form magnesium oxide (MgO). The balanced equation shows that two moles of magnesium react with one mole of oxygen to produce two moles of magnesium oxide.

When magnesium is burned, it undergoes a redox reaction with oxygen. Magnesium atoms lose two electrons to form Mg2+ ions, while oxygen molecules gain four electrons to form O2- ions.

The resulting ions combine to form the ionic compound magnesium oxide (MgO), which is a white solid. The balanced equation reflects the stoichiometry of the reaction, indicating the correct ratio of reactants and products.

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Answer:

pOH = 12.50

Explanation:

pOH + pH = 14

pOH = 14 - 1.50 = 12.50

Answer:

1.168 x 10^28

Explanation:

CH4= carbon + hydrogen: 12+(4 x1)= 16g

16 7.3 x 10^25

----- x ------------------- = 1.168 x 10^28

1 1

Answer:

The prediction of the student about the amount of reactant and product is incorrect.

No, I do not agree with the student’s prediction because the amount of reactant is always equals to the amount of product. According to the Law of Conservation of Mass, mass cannot be created nor destroyed. Therefore in any chemical reaction the mass of the products must equal or same to the mass of the reactants so according to this law, the prediction of the student is incorrect.

Explanation:Give brailiest please

Answer:

The chemical reaction that occurs when vinegar and baking soda (sodium bicarbonate) are combined, creates a gas that is known as carbon dioxide (or CO2). I would agree with the student's prediction because the atoms rearrange themselves to create the product.

Explanation:

Hope this helps! Pls give brainliest!

Answer:

i think it is D.

Explanation:

The answer is D because it’s where a solid turns to a gas without going through a liquid phase if that makes sense