PLEASE HELPPPPPPPPPPPPPP​

The given question is incomplete. The complete question is:

When 136 g of glycine are dissolved in 950 g of a certain mystery liquid X, the freezing point of the solution is 8.2C lower than the freezing point of pure X. On the other hand, when 136 g of sodium chloride are dissolved in the same mass of X, the freezing point of the solution is 20.0C lower than the freezing point of pure X. Calculate the van't Hoff factor for sodium chloride in X.

Answer: The vant hoff factor for sodium chloride in X is 1.9

Explanation:

Depression in freezing point is given by:

[tex]\Delta T_f=i\times K_f\times m[/tex]

[tex]\Delta T_f=T_f^0-T_f=8.2^0C[/tex] = Depression in freezing point

[tex]K_f[/tex] = freezing point constant

i = vant hoff factor = 1 ( for non electrolyte)

m= molality =[tex]\frac{136g\times 1000}{950g\times 75.07g/mol}=1.9[/tex]

[tex]8.2^0C=1\times K_f\times 1.9[/tex]

[tex]K_f=4.32^0C/m[/tex]

Now Depression in freezing point for sodium chloride is given by:

[tex]\Delta T_f=i\times K_f\times m[/tex]

[tex]\Delta T_f=20.0^0C[/tex] = Depression in freezing point

[tex]K_f[/tex] = freezing point constant  

m= molality = [tex]\frac{136g\times 1000}{950g\times 58.5g/mol}=2.45[/tex]

[tex]20.0^0C=i\times 4.32^0C\times 2.45[/tex]

[tex]i=1.9[/tex]

Thus vant hoff factor for sodium chloride in X is 1.9

Answer: [tex]BaCl_2[/tex] is the limiting reagent and [tex]Al_2(SO_4)_3[/tex] is the excess reagent.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of aluminium sulphate}=\frac{150g}{342.15g/mol}=0.438moles[/tex]

[tex]\text{Moles of barium chloride}=\frac{200g}{208.23g/mol}=0.960moles[/tex]

The balanced chemical reaction is:

[tex]Al_2(SO_4)_3+3BaCl_2\rightarrow 2AlCl_3+3BaSO_4[/tex]  

According to stoichiometry :

3 moles of [tex]BaCl_2[/tex] require = 1 mole of [tex]Al_2(SO_4)_3[/tex]

Thus 0.960 moles of [tex]BaCl_2[/tex] will require=[tex]\frac{1}{3}\times 0.960=0.320moles[/tex]  of [tex]Al_2(SO_4)_3[/tex]

Thus [tex]BaCl_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Al_2(SO_4)_3[/tex] is the excess reagent as it is left.

According to the mole concept , there are 184.8 grams in 4.62 moles of sodium hydroxide.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.Number of moles is given as, mass/ molar mass

∴mass=number of moles×molar mass

On substitution, mass= 4.62×40=184.8 g

Thus, there are 184.8 g in 4.62 mole of sodium hydroxide.

Learn more about mole,here:

https://brainly.com/question/26416088

#SPJ2

Answer:

your answer is C

Explanation:

because when u make P1 the subject formula then P2 V2 will be divided with V1

[tex]\huge\underline\mathbb\pink{ANSWER\::}\\\\[/tex]

_BaS + _PtF2 → _BaF2 + _Pts

Barium Sulfide + Platinum(II) Fluoride = Barium Fluoride + Platinum(II) Sulfide.

=> 1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS

[tex]\\\\\\[/tex]

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST☺️

Answer:

The metals are on the bottom left in the periodic table, and the nonmetals are at the top right. The semimetals lie along a diagonal line separating the metals and nonmetals. The elements are arranged in a periodic table, which is probably the single most important learning aid in chemistry.

Explanation:

im not sure if there was supposed to options to that question or not

Based on Table F, the chemical compound which is least soluble in water is: 1. [tex]AlPO_4[/tex].

Solubility can be defined as a terminology that describes how readily a chemical substance or compound can be dissolved in a solvent to form a solution.

In Chemistry, a chemical substance or compound is said to be soluble if it dissolves completely in a solvent such as water.

Based on Table F, the chemical compound which is least soluble in water is [tex]AlPO_4[/tex] because phosphates are generally insoluble.

Read more on solubility here: https://brainly.com/question/23946616

Answer:

I think it would be B.

Explanation:

Answer:

An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.

Answer:

Hi! An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.

If this helped drop a brainley plz ;)

Explanation:

Answer:

Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.

Your welcome

Answer:

The three components of a chemical formula are the empirical formula, the molecular formula, and the structural formula.Hope this answer helps.

Answer:

Three ways that I would make most of this situation are going near an area to avoid the things drifting into space. I would seek shelter in a basement. I would also stay indoors.

Earth's atmosphere and its oceans, rivers, and lakes would be one of the first things to drift away into space, we would need to avoid those obstacles by seeking shelter. The first problem is that Earth is rotating at high speed, rather like the way a weight on a string rotates if you spin it around your head. Anyone unfortunate enough to be outside at the time would quickly be lost. People inside buildings would be safer because most buildings are so firmly rooted to the ground that they would stay put even without gravity – at least for a while.

Gravity is the universal force that attracts matter. If there is less gravity, then the objects on the Earth will become weightless.

Gravity or the gravitational force is the fundamental force present in the universe that keeps the matter attracted to each other. It plays a major role in the rotation of the earth around the sun and keeps the atmosphere of the planet balanced.

In case of no gravity, the objects will become weightless and will start to float, and Earth will stop rotating and will collide with the sun. Also, the moon will collide with the earth and the objects will perish in the universe.

Learn more about gravity there:

https://brainly.com/question/12054584

#SPJ2

Answer:

An atomic number of 94

Explanation:

Just took the practice

Answer:

A Bose-Einstein condensate or BEC in simple words is a group of atoms cooled near absolute zero.

Answer:

[tex]\Large \boxed{\sf 0.714 \ moles}[/tex]

Explanation:

Avogadro's number can be used as a conversion factor from atoms to moles or moles to atoms.

[tex]\displaystyle \frac{4.3 \times 10^{23}}{6.022 \times 10^{23} } =0.714048[/tex]

Answer:

hello

Bromate is a bromine oxoanion and a monovalent inorganic anion. It is a conjugate base of a bromic acid.

Explanation:

thanks

Answer:

The volume is decreasing at a rate of 30 cm³/min.

Explanation:

From the question given above, pressure (P) and volume (V) are related by the following equation

PV = C

C => constant

If we make P the subject of the above, we shall have:

P = C/V

From the equation above (i.e P = C/V),

We can say that P is inversely proportional to V. This implies that as P is increasing, V will be decreasing and also, as P is decreasing, V will be increasing.

Considering the question given above, the pressure (P) is increasing at a rate of 30 kPa/min. Therefore, the volume will be decreasing at a rate of 30 cm³/min.

Answer:

resources that you can use more than 1 time like rechargeable battery or solar energy

Explanation:

Answer:

hydrated ferric oxide is ferric hydoxide sol and is positively charged. When aqueous solution of NaCl is added to it,the Cl- ions neutralise the positive charge on the sol particles. In the absence of charge, brown precipitate is formes due to colloids can be coagulation of particles.Nov 11, 2020

Explanation: hope this help

Answer:

Option B.

Explanation:

First we convert 9.90 g of Pb(NO₃)₂ into moles, using its molar mass:

Then we convert moles of Pb(NO₃)₂ into moles of PbO, using the stoichiometric coefficients:

Now we convert 0.0299 mol PbO into grams, using its molar mass:

So 6.67 g is the theoretical yield. With that in mind we calculate the percent yield:

So the correct answer is option B.

Answer:Concentration of products can vary.

As more solute dissolves, more ions form; but the volume in which they are contained does not change.

Concentration of the solid phase does not change.

Explanation:

Answer:

Li + HCl = LiCl + H2 - Chemical Equation Balancer.

Explanation:

Answer:

From solutions that evaporate

From hot water solutions when the solution cools

Explanation:

The substances that can form minerals can be dissolved in the water to form a solution. Solution can be described as as a mixture in which a solute is dissolved in a solvent. When a particular dissolved solute evaporates from the solution, crystals of minerals might form. The mineral halite was formed when seas evaporated over a period of time.

The minerals can also be formed when a hot water solution gets cooled.

Answer: potential energy is stored

Explanation:

(っ^-^  )っ Hey There!

Answer →  As light travels a certain distance, the intensity of the light will decrease by a square of the distance.

Why →  The farther away the light is the dimer it gets but the close light gets the bright it gets

✨Hope this Helps!✨

Answer:

B. The limiting reactant determines the maximum amount of product that can be formed.

Answer:

Wet climates obviously have more water than driers climates. Metals, when subject to water have the tendency to oxidize rust. Therefore, if water is barely present in a climate, then oxidation is also least likely to occur.

Explanation:

Learnt it from reading a book