What will be the freezing point depression of 0.4 m NaCl solution and 0.4 m glucose solution?

Answer:

The government allocates a budget for research every year. The spending of that money is determined by government priorities. Some of the money is spent directly, in government-funded research centers.

Other money is distributed to other research institutions.

Money spent by other institutions for research has no government oversight.

Explanation:

The two elements have the same number of dots around their chemical symbols in their electron dot diagrams are: (C). P and As

Chemical symbol can be defined as a representation of an element using letters.

Chemical symbol are given to each element distinctively and this is an easier way to represent an element.

Some examples of chemical symbols are; O for oxygen, Zn for zinc, and Fe for iron etc.

In conclusion, The two elements have the same number of dots around their chemical symbols in their electron dot diagrams are: (C). P and As

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Nuclear fission yields more energy than fossil fuel combustion. Some examples of fossil fuels are coal, oil, or gas. The procedure delivers almost 8,000 times more additional power than the typical fossil fuel method. This results in less material being used and yielding less waste.

The main difference between them is the type of fuel. Nuclear power plants use radioactive elements such as uranium to produce heat in the process. On the other hand, coal power plants use coal as a source of energy.

The quantities required are very less than for coal or oil. One kg of natural uranium will yield about 20,000 times as much energy as the same amount of coal.

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For conducting chemical reactions, electrochemical methods rely on electrochemical cells to supply the necessary voltage and current.

How are electrochemical cells dependent on them?

Electrochemical cells, which are machines that use electricity to move ions from one electrode to another, are the foundation of electrochemical methods. I

In an electrochemical cell, a voltage source provides the energy required to move the ions while also driving their motion. A chemical reaction between the electrodes and the ions is sparked by this energy, and the result is a current.

The concentration of the electroactive species in the solution is then determined using the current generated. As a result, electrochemical cells are necessary for electrochemical methods. Chemical reactions can also be used to create energy in electrochemical cells.

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To calculate the grams of NaCl in a 100 g solution with water, when the solution is 19% NaCl by weight, we can use the formula:

Grams of NaCl = Total weight of solution (in grams) × Percentage of NaCl / 100

In this case, the total weight of the solution is 100 g and the percentage of NaCl is 19%. Plugging in these values:

Grams of NaCl = 100 g × 19 / 100 = 19 grams

Therefore, there are 19 grams of NaCl in the 100 g solution.

Regarding the chemical reaction equation, to balance it, we can use the coefficients to adjust the number of atoms on each side.

The equation is: ___SO2 + ___O2 -> ___SO3

The correct balanced equation is: 2SO2 + O2 -> 2SO3

The coefficients in this balanced equation indicate that we need 2 molecules of SO2, 1 molecule of O2, and 2 molecules of SO3 to balance the reaction.

B. To calculate the density of a substance, we use the formula:

Density = Mass / Volume

In this case, the mass of the gasoline is given as 20.2 kg and the volume is given as 23.7 liters.

Density = 20.2 kg / 23.7 L

Calculating this:

Density = 0.851 Kg/L

Rounding this value to the correct significant figures gives:

Density = 0.85 Kg/L

Therefore, the density of gasoline is approximately 0.85 kg/L.

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The method used to obtain colored light from a filament lamp is additive. A filament lamp is a device that emits white light when it's turned on. However, the light can be made to appear colored by using a technique called additive color mixing. In this method, colored filters are used to filter the white light emitted by the filament lamp. The colored filters absorb some of the light wavelengths and allow others to pass through. When different colored filters are used, the colors of the light that passes through them combine to produce a new color. This method is called additive because the colors of light are added together to produce a new color.

The correct option is A. additive.

The empirical formula of metal fluoride is CuF2 when a 12.68 g sample of copper is heated in the presence of excess fluorine a metal fluoride is formed with a mass of 20.27g.

Empirical formula of the compound is the Ratio of the atoms present in the compound .It is a simplest whole number chemical compound.

No. of moles of the element is calculated as ,

No of moles of the element= mass of the element / molar mass of the element

so mass of the copper is 12.68gram and the molar mass of the carbon is 63.546 g/mole. It forms the total mass of 0.1995 mol. Reacting with flourine to get CuF2 .

Mass of the metal fluoride formed is 20.27 g.

Moles of copper = 12.68g/63.546g/mole

molar mass of florine is 18.99 g/mol.

molar mass of CuF2 is 101.543 g/mol.

so, 0.1995 mol . 101.543 g/mole =  20.27 g

hence proved the empirical formula of metal fluoride is CuF2.

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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

50 N

Explanation

Answer:

See explanation

Explanation:

The laboratory provides a controlled environment for scientific studies. In the field, it is more difficult to control extraneous variables. Extraneous variables are other variables which are not the independent variable but could inadvertently affect the dependent variable.

Extraneous variables are better controlled in the secluded environment of a laboratory better than they could be controlled in the field. This makes it more difficult to have control variables in the field than it is to have them in the laboratory. Recall that control variables are variables that must remain unchanged throughout the study.

your question was incomplete.............. you haven't mentioned any required information

Answer: it floats because it’s less dense than water

Explanation: since it’s less dense it floats

Answer: yes but usally to Doujinshi

Explanation:cause it’s better then Real stuff I guess

Answer:

boy noooooo

Explanation:

Answer: 1265.6037

Explanation:

The correlation coefficient is a number between zero and 1 and the answer is false

And that is because the correlation coefficient is a number between -1 and one. A positive correlation coefficient means that two variables are positively correlated or move in the same direction. Plus one means perfect like full correlation, zero means there is no correlation whatsoever.

And a negative correlation means that as one variable moves in a positive direction, the other moves in a negative direction, so that is negative correlation, And the correlation of -1 means perfect negative correlation.

The correlation coefficient is a statistical measure of the strength of the relationship between the relative movements of two variables. The values range between -1.0 and 1.0. A calculated number greater than 1.0 or less than -1.0 means that there was an error in the correlation measurement.

A correlation of -1.0 shows a perfect negative correlation, while a correlation of 1.0 shows a perfect positive correlation. A correlation of 0.0 shows no linear relationship between the movement of the two variables.

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The neutralization reaction is:

O2H 3PO4 + 3Ba(OH) 2 → 6H 2O+ Ba(PO 4)2

A neutralization reaction is a type of chemical reaction that occurs between an acid and a base, resulting in the formation of a salt and water.

In this reaction, the hydrogen ions (H+) from the acid react with the hydroxide ions (OH-) from the base to form water (H2O), which neutralizes the acidic and basic properties of the reactants. The remaining ions then combine to form a salt.

The general equation for a neutralization reaction is:

Acid + Base → Salt + Water

For this question, the chosen answer is the neutralization reaction  because an acid (H3PO4) and a base (Ba(OH)2) react to form water and a salt (Ba(PO4)2).

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Answer:

It represents elements and molecules, the periodic table is an array of measurements and properties of the element themselves.

Explanation:

from ai

12.33 liters of oxygen are produced when 45.0 g of KClO3 decomposes.

The mass in grams of one mole of a material is its molar mass. The molar mass of a material may be found by adding the molar masses of its constituent atoms, as demonstrated in this video. The computed molar mass may then be used to convert between mass and the quantity of moles in the material.

KClO3 ------>  kcl+ 3/2 O2

KClO3 122.55 gm in terms of molar mass.

Given mass = 459 moles of KCl03= 45 10.367 moles 122.55,

we know that the reaction produces 1 mole of kuo and 3 moles of O2.

I mole + 3/2 mule 02.. 0.367 mole X mole 02

X= 0.367X3 =0.5505 mol using the straightforward unitary technique.

Oxygen capacity at STP = 0.5505 x 22.41

12.33 liters

12.33 liters of oxygen are produced when 45.0 g of KClO3 decomposes.

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Answer:

N203

Explanation:

Answer:

n203

Explanation:

\(\bold{\huge{\underline{Answer}}}\)

Reaction :-

Reaction :-

\(\sf{C2H6SO4 + H2O}{\sf{\underline{\,\,yeilds\,\,}}}{\sf{ethanol}}\)

Reaction :-

\(\sf{C2H5Cl+ KOH}{\sf{\underline{\,\,boils\,\,}}}{\sf{C2H5OH + KCl}}\)

Process 1:

Organic reactant: Ethylene (C₂H₄)

Type of reaction: Addition reaction

Process 2:

Organic reactant: Carbon monoxide (CO) and hydrogen (H₂)

Type of reaction: Catalytic hydrogenation

1. In the first process, ethanol can be manufactured by the addition reaction of ethylene (C₂H₄). Ethylene, a hydrocarbon, undergoes an addition reaction with water (H₂O) in the presence of a catalyst to produce ethanol (C₂H₅OH). The reaction involves breaking the carbon-carbon double bond in ethylene and forming new single bonds with two hydrogen atoms from water, resulting in the formation of ethanol.

2) In the second process, ethanol can be manufactured through a catalytic hydrogenation reaction. This involves reacting carbon monoxide (CO) and hydrogen (H₂) in the presence of a suitable catalyst, such as copper or zinc, at elevated temperature and pressure. The reaction proceeds via the reduction of carbon monoxide and the addition of hydrogen atoms, leading to the formation of ethanol (C₂H₅OH).

This process is commonly known as the "synthesis gas fermentation" or "syngas fermentation" and is an essential method for producing ethanol from syngas derived from various feedstocks.

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15000g Lithium can be carried around with you.

Lithium is the lightest or is considered as the least dense metal with a density of 0.534 g/cm³ which is comparable to the density of a pine wood. More the amount of density, more amount of mass that particular element has. Density is the ratio of mass to volume, or it tells how much matter is packed in a given area. Palladium is a heavy metal with 12.02 g/cm³. Therefore, it has more density or more mass than lithium so it would definitely be difficult to carry around palladium than lithium. palladium has high mass to volume ratio than lithium.

Thus, with respect to palladium, Lithium being a light metal can be carried around easily. 

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The mixture of NH4Cl and CH3NH2 in aqueous solution would be an effective buffer solution.

The mixture of HCOOH and NaHCOO would be an effective buffer solution. The other options would not be effective buffer solutions because they either do not contain a weak acid and its conjugate base or the pKa values of the weak acid and its conjugate base are too far apart.

A buffer solution is a solution that resists a change in pH upon addition of small amounts of acid or base. The buffer capacity of a solution depends on the concentrations of the weak acid and its conjugate base. In this case, HCOOH (formic acid) is a weak acid and NaHCOO (sodium formate) is its conjugate base.

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I don't know I am having the same problem

Explanation:

An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.

hope it helps

Answer:

Explanation:

Answer:

1. V2.

2. 299K.

3. 451K

4. 0.25 x 451 = V2 x 299

Explanation:

1. The data obtained from the question include:

Initial volume (V1) = 0.25mL

Initial temperature (T1) = 26°C

Final temperature (T2) = 178°C

Final volume (V2) =.?

2. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

Initial temperature (T1) = 26°C

Initial temperature (T1) = 26°C + 273 = 299K

3. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

Final temperature (T2) = 178°C

Final temperature (T1) = 178°C + 273 = 451K

4. Initial volume (V1) = 0.25mL

Initial temperature (T1) = 299K

Final temperature (T2) = 451K

Final volume (V2) =.?

V1 x T2 = V2 x T1

0.25 x 451 = V2 x 299

Answer :

a series of experiments carried out towards the end of the 19th century and early 20th century led to the discovery of the fundamental sub particles of the atom :

The Proton has a positive charge and a relative mass of 1 ( using carbon 12 as standard).

The neutron has no charge but has a relative mass of 1.

In fact is characteristic of the neutron is a some of that of the Proton and the electron.

Atomic number represent the number of protons in the nucleus of an atom.

the mass number of an atom of an element is the sum of the protons and neutrons in it.