How many moles of glucose are present in 50. 0 grams of an aqueous solution that is 2. 50% by mass glucose? the molar mass of glucose is 180. 16 g/mol.

Answer:

conclusion

Explanation:

it can't be a hypothesis since tests are carried out to verify so it is not a theory

an introduction to an experiment only gives the basis of what we are investigating therefore nothing has been proven and the question is still unanswered

The overall takeaway of an experiment’s results is the conclusion. Hence, option C is correct.

A hypothesis is a testable statement about the relationship between two or more variables or a proposed explanation for some observed experiment.

The overall takeaway of an experiment’s results can't be a hypothesis since tests are carried out to verify so it is not a theory

An experiment only gives an idea about the investigation therefore nothing has been proven and the question is still unanswered.

Hence, the overall takeaway of an experiment’s results is the conclusion.

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Answer:

\(\boxed {\boxed {\sf 6.4 \ atm}}\)

Explanation:

We are asked to find the pressure of a gas in a can given a change in temperature. We will use Gay-Lussac's Law, which states the pressure of a gas is directly proportional to the temperature. The formula for this law is:

\(\frac {P_1}{T_1}= \frac {P_2}{T_2}\)

Initially, the gas in the aerosol can has a pressure of 3.10 atmospheres at a temperature of 25 degrees Celsius.

\(\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{T_2}\)

The temperature is increased to 52 degrees Celsius, but the pressure is unknown.

\(\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{52 \textdegree C}\)

We are solving for the new pressure, so we must isolate the variable \(P_2\). It is being divided by 52 degrees Celsius. The inverse operation of division is multiplication, so we multiply both sides of the equation by 52 °C.

\(52 \textdegree C *\frac { 3.10 \ atm}{25 \textdegree C}=\frac{P_2}{52 \textdegree C} * 52 \textdegree C\)

\(52 \textdegree C *\frac { 3.10 \ atm}{25 \textdegree C}=P_2\)

The units of degrees Celsius cancel.

\(52 *\frac { 3.10 \ atm}{25}=P_2\)

\(52 *0.124 \ atm = P_2\)

\(6.448 \ atm = P_2\)

The original values of pressure and temperature have 2 and 3 significant figures. Our answer must be rounded to the least number of sig figs, which is 2. For the number we calculated, that is the tenths place. The 4 in the hundredth place tells us to leave the 4 in the tenths place.

\(6.4 \ atm \approx P_2\)

The gas pressure in the can at 52 degrees Celsius is approximately 6.4 atmospheres.

Answer:

Mass and Volume

Explanation:

The formula for density is

\(\frac{Mass}{Volume}\)

Answer:

Nervous; nervous.

Explanation:

A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.

Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.

Generally, the nervous system found in living organisms such as humans, comprises of two (2) major components or systems; a central nervous system (CNS) and a peripheral nervous system (PNS).

After considering the given the data we conclude that the  ionization energy generally increases from left to right across a period. Therefore, the element with the highest ionization energy in period 3 would be located on the right side of the periodic table.

We can also see from the search results that helium has the highest ionization energy of all the elements, while sodium has the lowest ionization energy in period 3. Therefore, we can conclude that the element with the highest ionization energy in period 3 is located to the right of sodium.
Based on the periodic table, we can see that the elements in period 3 are:
Sodium (Na)
Magnesium (Mg)
Aluminum (Al)
Silicon (Si)
Phosphorus (P)
Sulfur (S)
Chlorine (Cl)
Argon (Ar)
Therefore, the element with the highest ionization energy in period 3 is most likely Argon (Ar), which is located on the far right side of the period.
In summary, the element with the highest ionization energy in period 3 is most likely Argon (Ar).
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Answer:

0.142

Explanation:

Answer:

0.142 moles.

You would have to convert the algorithm to a broken down version of the compound.

NH4NO3(aq] → NH+4(aq] + NO−3(aq]

The ammonium is removed for this case, concentration gets broken down to zero.

So here, if 1 liter is equal to 10 x 10 x 10 milliliters...

use the formula of n and c to help you figure out the moles.

C is equal to N divided by V, so in that case...

N equals C times V.

C times V is 0.425, or 17 over 40 in simplest form.

From there, multiply 17 over 40 by the current moles, cross out the liters, and multiply by 335, then, 10 to the power of -3. You have to flip it to negative, because it will cancel out either way. Change the equation by the liters, and you have 0.125

Hence, your correct answer is 0.125

In the given chemical equation, the reactants are 4 FeS and 7 O2. These two substances react to form 2 Fe2O3 and 4 SO2. , the molecules present in the reactants are FeS and O2.

Chemical reactions occur when two or more substances come into contact with each other and interact to form new substances. These new substances have different properties and characteristics from the original substances that were present at the beginning of the reaction. In order for a reaction to occur, the substances that are involved in the reaction must be in the correct proportions. This is why chemical equations are important, as they give us information about the reactants and products that are involved in the reaction as well as the proportions in which they react.Molecules are the smallest units of a substance that still retain the properties of that substance. In a chemical reaction, molecules of the reactants come into contact with each other and interact to form molecules of the products. The reactants are the substances that are present at the beginning of the reaction, while the products are the substances that are formed at the end of the reaction. The chemical equation for the reaction gives us information about the molecules that are present in the reactants and products, as well as the proportions in which they react.

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Answer:

Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro. It is thinner and denser than continental crust, which is made of light-colored rocks called andesite and granite. The low density of continental crust causes it to “float” high atop the viscous mantle, forming dry land.

Explanation:

To reach break point chlorination in a 96,000 gallon pool with a difference of 0.4 ppm between the free chlorine and total chlorine levels, approximately 7.68 ounces of chlorine is needed.

To calculate the amount of chlorine needed to reach break point chlorination in a 96,000 gallon pool, we first need to find the difference between the total chlorine and free chlorine levels. Break point chlorination is achieved when the free chlorine level equals the total chlorine level.

Given that the free chlorine level is 1.4 ppm and the total chlorine level is 1.8 ppm, the difference between them is:

1.8 ppm - 1.4 ppm = 0.4 ppm

Now, we need to determine the amount of chlorine required to raise the free chlorine level by 0.4 ppm in a 10,000 gallon pool. The given information states that it takes 2 ounces of dry chlorine (67% concentration) to raise a 10,000 gallon pool's chlorine level by 1 ppm.

To calculate the amount of chlorine required to raise the free chlorine level by 0.4 ppm in a 10,000 gallon pool, we can set up a proportion:

2 ounces / 1 ppm = X ounces / 0.4 ppm

Solving for X (the amount of chlorine needed for 0.4 ppm increase in a 10,000 gallon pool):

X = (2 ounces / 1 ppm) * 0.4 ppm = 0.8 ounces

Now, we can calculate the amount of chlorine needed for the 96,000 gallon pool by scaling the chlorine required for the 10,000 gallon pool:

Amount of chlorine needed = (0.8 ounces / 10,000 gallons) * 96,000 gallons

Amount of chlorine needed = 0.8 ounces * 9.6 = 7.68 ounces

Therefore, approximately 7.68 ounces of chlorine is needed to reach break point chlorination in the 96,000 gallon pool.

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A cell membrane is more flexible than a brick wall. Why might many cells benefit from a flexible cell membrane because it allows them to survive in and out of the cell.

The cell is surrounded by a membrane called as cell membrane . cell membrane is a semipermeable membrane. semipermeable membrane is the type of membrane which allows solvent particles to pass through it . or some molecules or ion . Therefore , many cells benefited by cell membrane as they can pass through it.

Thus, A cell membrane is more flexible than a brick wall. Why might many cells benefit from a flexible cell membrane because it allows them to survive in and out of the cell.

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Answer:

Hi, try following the steps on the explanation on all your questions :) it's easy.

Explanation:

To determine the number of atoms in 0.85 moles of Sodium (Na), we need to use Avogadro's number, which is 6.022 x 10^23 particles per mole.

Number of atoms = moles x Avogadro's number

Number of atoms = 0.85 mol x 6.022 x 10^23 particles/mol

Number of atoms = 5.12 x 10^23 atoms

Therefore, there are approximately 5.12 x 10^23 atoms in 0.85 moles of Sodium (Na).

Answer:

D Nimbostratus

Explanation:

Answer: Freeze-thaw weathering and Chemical Weathering

Explanation: I can't see the options, but I'll give it a go.

Physical weathering occurs when rocks are broken down into smaller pieces without changing their composition. The alternating freeze-thaw cycles in Lansing during the winter season contribute to the physical weathering of the sandstone cliffs. Water seeps into cracks and crevices in the rocks and then freezes when temperatures drop below freezing point. When water freezes, it expands, causing the rocks to crack and break apart. This process is called freeze-thaw weathering. Evidence for physical weathering can be seen in the form of small cracks and fractures on the surface of the sandstone cliffs.

Chemical weathering occurs when rocks are broken down by chemical reactions. In Lansing, the water that seeps into the sandstone cliffs contains dissolved iron, copper, and manganese. Over time, these minerals react with the sandstone, causing it to break down and dissolve. The dissolved minerals then stain the surface of the sandstone cliffs, giving them their characteristic red, green, and black stripes. Evidence for chemical weathering can be seen in the staining on the surface of the sandstone cliffs and the presence of dissolved minerals in the water that flows from the cliffs.

The number of molecules in 12.5 moles of CaCO₃ is 7.525×10²⁴ molecules

From Avogadro's hypothesis, we understood that

1 mole of CaCO₃ = 6.02×10²³ molecules

Using the above information, we can obtain the number of molecules in 12.5 moles of CaCO₃ as illustrated below:

From Avogadro's hypothesis,

1 mole of CaCO₃ = 6.02×10²³ molecules

Therefore,

12.5 moles of CaCO₃ = (12.5 moles × 6.02×10²³ molecules) / 1 mole

12.5 moles of CaCO₃ = 7.525×10²⁴ molecules

Thus, we can conclude from the calculation made above that the number of molecules is 7.525×10²⁴ molecules

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Answer:

7.5 hours

Explanation:

half life is the a period of time the sample takes to be half the amount it started the period with

it means we can express it as

original amount / (2^n) = current amount

where n is the number of periods

in the problem if we put 100 / (2^n) = 6.25

we will find that n = 4

we divide 30 over 4 and we get that half life of each period will be equal to 7.5

Explanation:

proton ..............

Answer:

it changes color from blue to light green.

Explanation:

due to copper iron nail functions

Answer:

give the other person brainlieset plz

Explanation:

Answer:

A.) It cannot be quickly replaced.

Explanation:

Aluminum is extremely useful to humans but is semi-difficult to produce. Because of this, your answer will be numero uno. (Or A.)

Answer: we'll for sunny days that we'll be high pressure and for low pressure that we'll be cloudy and foggy moist days .

Explanation:

The redox couple with the highest (most positive) redox potential is d. plastocyanin-Cu2+/plastocyanin-Cu.

The redox couple plastocyanin-Cu2+/plastocyanin-Cu does indeed have the highest (most positive) redox potential among the options provided.

Plastocyanin is a copper-containing protein involved in electron transfer within the photosynthetic electron transport chain. Its redox potential is relatively high due to the strong oxidizing properties of copper and its ability to accept and donate electrons during the electron transfer process.

Compared to the other redox couples mentioned in the options, plastocyanin-Cu2+/plastocyanin-Cu has the highest redox potential, making it an essential component in the electron transfer process and contributing to the efficient functioning of photosynthesis.

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Answer:

The answer is option OB.

Answer: B) carbon + oxygen - carbon dioxide

Explanation: The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon-oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140-pm length of a typical single C–O bond, and shorter than most other C–O multiply-bonded functional groups such as carbonyls. Since it is centrosymmetric, the molecule has no electric dipole moment. As a linear triatomic molecule, CO2 has four vibrational modes as shown in the diagram. In the symmetric and the antisymmetric stretching modes, the atoms move along the axis of the molecule. There are two bending modes, which are degenerate, meaning that they have the same frequency and same energy, because of the symmetry of the molecule. When a molecule touches a surface or touches another molecule, the two bending modes can differ in frequency because the interaction is different for the two modes. Some of the vibrational modes are observed in the infrared (IR) spectrum: the antisymmetric stretching mode at wavenumber 2349 cm−1 (wavelength 4.25 μm) and the degenerate pair of bending modes at 667 cm−1 (wavelength 15 μm). The symmetric stretching mode does not create an electric dipole so is not observed in IR spectroscopy, but it is detected in by Raman spectroscopy at 1388 cm−1 (wavelength 7.2 μm).

Answer:

In pretty sure it's B, Beta

Explanation:

Answer:

B

Explanation:

found it from a person wjwjdjjanqnqq

The claim that scientific knowledge is based on observation and inference is that science is always about  empirical evidence , and when making observations , we can get some evidences and inference which serves a conclusion gotten on basis of evidence and reasoning.

Science knowledge serves as the knowledge that is based and focus on  empirical evidence.

It should be noted that in  Science disciplines  their is sharing of common rules of evidence  which is needed in  evaluation of  explanations about natural systems.

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Sodium [Na] content in sodium carbonate [Na2CO3] is calculated as 46/106 x 100, or 43.40%.

1. Samples 1, 2, and 3 all contain the same substance.

2. Y is a distinct compound, but X and Z are the same compound.

Na = 43.3%, C = 11%, and O = 45.3% in Sample 1, Sample 2 = 43.4%, C = 11%, and O = 45.1% in Sample 2, and Sample 3 = 43.3%, C = 11%, and O = 45.3%.

The identical substance is used in samples 1, 2, and 3.

2.Example X: Ca = 40.0%, C = 12%, and O = 48.0%

Sample-Y: Ca = 31.3%, C = 19%, O = 50.0%;

Sample-Z: Ca is 40%, C is 12%, and O is 480%.

Y is a different compound from X and Z, which are the same compounds.

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Answer:

The electronic configuration of the element with Atomic number 19 is 2,8,8,1. The element is potassium. It is an alkali metal with one valence electron.

Answer:

Explanation:

It is to keep the mixture homogeneous

The aim is to produce a homogenous mixture.

Examples of homogenous mixtures are as follows:

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The diffusion rate of carbon dioxide out of the shell can be calculated using Fick's first law of diffusion, which states that the diffusion rate is proportional to the diffusion coefficient, the surface area, and the concentration difference.

First, we need to calculate the surface area of the shell:

The diameter of the shell is given as 4.5 cm, so the radius is half of that, which is 2.25 cm.

The surface area of a sphere is given by the formula A = 4πr^2.

Plugging in the radius, we get A = 4π(2.25 cm)^2 = 63.59 cm^2.

Next, we need to calculate the concentration difference:

The carbon dioxide concentration inside the shell is given as 2.0 atm, while the concentration outside the shell is essentially zero. The concentration difference is therefore 2.0 atm - 0 atm = 2.0 atm.

Now we can calculate the diffusion rate using the formula diffusion rate = diffusion coefficient * surface area * concentration difference. Plugging in the given values, we get diffusion rate = (2.5×10^(-12) m^2/s) * (63.59 cm^2) * (2.0 atm) = 3.18×10^(-9) cm^3·atm/s.

To convert this to molecules per second, we need to use Avogadro's number, which is 6.022×10^23 molecules/mol. Since carbon dioxide has a molar mass of approximately 44 g/mol, we can convert the diffusion rate to molecules per second by multiplying it by Avogadro's number and dividing by the molar mass of carbon dioxide. The molar mass of carbon dioxide is 44 g/mol = 44000 mg/mol.

diffusion rate (in molecules/s) = (3.18×10^(-9) cm^3·atm/s) * (6.022×10^23 molecules/mol) / (44000 mg/mol) = 4.34×10^14 molecules/s.

So, the diffusion rate of carbon dioxide out of the shell is 4.34×10^14 molecules/s.

For Part B, we can use the diffusion rate from Part A to calculate the time it takes for the carbon dioxide pressure to decrease to 1.0 atm.

The initial pressure is 2.0 atm and the final pressure is 1.0 atm.

Since the rate is constant, we can use the formula time = (final pressure - initial pressure) / diffusion rate.

Plugging in the values, we get time = (1.0 atm - 2.0 atm) / (4.34×10^14 molecules/s) = -2.3×10^(-15) s.

To convert this to hours, we divide by 3600 s/hour and take the absolute value to get time = |(-2.3×10^(-15) s) / (3600 s/hour)| = 6.4×10^(-19) hours.

So, it will take approximately 6.4×10^(-19) hours for the carbon dioxide pressure to decrease to 1.0 atm, assuming a constant diffusion rate.

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