48. Which of the following (a) KCI (b) NaCl is called Sylvine? (c) CaCl₂ (d) MgCl₂​

We have five significant figures in the value 25 , 803 , 000 , 000 mg.

The term significant figures refers to the numbers of figures to which we can assign a mathematical values. The numbers that we refer to here must be non zero numbers.

The implies that we must look out for the values that are nonzero in the digits shown which is 25 , 803 , 000 , 000 mg. A close look at this values shows us that we have five figures that can be assigned values.

Thus we have five significant figures in the value 25 , 803 , 000 , 000 mg.

Learn more about significant figures:https://brainly.com/question/19728918

#SPJ1

27.94 g/mole is the molar mass of the unknown gas.

Use Graham's Law, which indicates that the square root of a gas's molar mass determines its rate of effusion.

The following equation compares two distinct gases, (a) and (b), and expresses this:

sqrt(M(b)/M) = R(a)/R(b) (a)

R is the effusion rate.

square root = sqrt

the molar mass, M

In response to your query, if gas (a) is the unknown gas and Xe(M = 131 g/mol) is the second gas, we have:

sqrt(M(Xe)/M(a) = 2.165, where R(a)/R(Xe)

Square both sides, and you get:

(2.165)² = 131 g/mol/ M (a)

M(a)(2.165)² = 131

M(a) is equal to 131/(2.165)² = 27.94 g/mol.

Having a molar mass of 27.94 g/mol, the unknown gas.

Learn more about Graham's law of effusion here https://brainly.com/question/22359712

#SPJ4

Hydroplaning occurs when water between the tires and the road builds until the tires begin to ride on a film of water, resulting in traction loss.

The motor vehicles or aircraft tires passing over wet pavement may lose contact with sufficient speed or water depth for a particular given tread design. The tires lose the braking friction required for stopping and start to hydroplane or aquaplane when they come into contact with water. Wet road surfaces can cause tires to hydroplane . This could result in loss of control and steering ability.

learn more about hydroplane

https://brainly.com/question/9422840

#SPJ4

As a gaseous element condenses, the atoms become closer together and they have more attraction for one another.

The transformation of water vapour into liquid is known as condensation. The process is the opposite of evaporation, in which liquid water turns into a vapour. Either the air is chilled to its dew point or it gets too saturated with water vapour to retain any more water, causing condensation to occur.

Attraction - Gas Particles move continuously in a straight path in a gas. They are significantly further apart and move independently of one another because the kinetic energy of the molecule is larger than the attraction force between them. There are often almost no attractive forces between particles.

to learn more about condensation go to - brainly.com/question/1268537

#SPJ4

At equilibrium the concentrations of:

[HSO₄⁻] = 0.10 M;

[SO₄²⁻] = 0.037 M;

[H⁺] = 0.037 M;

There is initially very little H+ and no SO₄²⁻ in the solution. A salt is KHSO₄⁻. All KHSO₄⁻ will split apart into K⁺ and HSO₄⁻ ions. [HSO₄⁻] will initially be present at a concentration of 0.14 M.

HSO₄⁻ will not gain H⁺ to produce H₂SO₄ since H₂SO₄ is a strong acid.  HSO₄⁻ may act as an acid and lose H⁺ to form SO₄²⁻. Let the final H⁺ concentration be x M. Construct a RICE table for the dissociation of HSO₄²⁻.

R   [tex]HSO_4^-[/tex]    ⇄  [tex]H^+ + SO_4^2^-[/tex]

I    [tex]0.14[/tex]

C   [tex]- x[/tex]               [tex]+x[/tex]       [tex]+x[/tex]

E   [tex]0.14-x[/tex]        [tex]x[/tex]         [tex]x[/tex]

[tex]K_a = 1.3[/tex] × [tex]10^-^2[/tex] for [tex]HSO^-_4[/tex] . As a result,

[tex]\frac{[H^+]. [SO_4^2^-]}{HSO_4^-} = K_a[/tex]

[tex]K_a[/tex] is large. It is no longer valid to approximate that [tex][HSO^-_4][/tex] at equilibrium is the same as its initial value.

[tex]\frac{x^2}{0.14-y} = 1.3 * 10^-^2[/tex]

[tex]x^2+1.3*10^-^2x - 0.14[/tex] × [tex]1.3[/tex] × [tex]10^-^2= 0[/tex]

Solving the quadratic equation for [tex]x , x \geq 0[/tex] since [tex]x[/tex] represents a concentration;

                             [tex]x=0.0366538[/tex]

Then, round the results to 2 significant figure;

Learn more about concentration here:

https://brainly.com/question/14469428

#SPJ4

thermite can be produced from aluminum and iron oxide according to redox reaction.

Redox reaction is defined as the the reaction in which one substance get oxidised and other one is reduced. In other words, Oxidation reduction reaction is called redox reaction.

Oxidation is termed as gain of electron and Reduction is termed as lose of electron.

Thermite is a mixture of an oxide of one metal and a powder of another metal.

Aluminium is usually used as a metal that basically decreases the oxide of the metal.

The thermite contains a mass ratio of ferric oxide and aluminium of 3:1.

It is used to weld broken iron pieces thermally. The reduction of aluminium ferric oxide is extremely exothermic, so the iron produced would be in the molten state.

Fe2O3+2Al→Al2O3+2Fe+heat

Thus, redox reaction of aluminum and ferrous oxide produce thermite.

learn more about redox reaction:

https://brainly.com/question/27734388

#SPJ4

Considering the Dalton's partial pressure, the total pressure in the mixture of gases is 1.371 atm.

The pressure exerted by a particular gas in a mixture is known as its partial pressure.

So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

[tex]P_{T}[/tex] = [tex]P_{1}+P_{2}+......+P_{n}[/tex]

where n is the amount of gases in the mixture.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture.  So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

[tex]P_{A}[/tex] = [tex]X_{a}P_{T}[/tex]

In this case, the partial pressure of gas H₂ can be expressed as:

[tex]P_{H2}[/tex] = [tex]X_{H2} P_{T}[/tex]

You know:

[tex]P_{H2}[/tex] = 0.48 atm

[tex]X_{H2}[/tex] = 0.35

Replacing in the definition of partial pressure of gas H₂:

[tex]0.48atm = 0.35P_{T}[/tex]

Solving:

[tex]P_{T}[/tex] = [tex]\frac{0.48atm}{0.35}[/tex]

[tex]P_{T}[/tex]= 1.371 atm

In summary, the total pressure in the mixture of gases is 1.371 atm.

Learn more about partial pressure: https://brainly.com/question/15302032

#SPJ4

A buffer solution contains an equivalent amount of acid and base. The pH of the solution with an acid dissociation constant (pKa) value of 3.75 is 3.82.

The amount of hydrogen or the proton ion in the solution is expressed by the pH. It is given by the sum of pKa and the log of the concentration of acid and bases.

Given,

Concentration of salt [HCOO⁻] = 0.24 M

Concentration of acid [HCOOH] = 0.20 M

The acid dissociation constant (pKa) = 3.75

pH is calculated from the Hendersons equation as,

pH = pKa + log [salt] ÷ [acid]

pH = 3.75 + log [0.24] ÷ [0.20]

= 3.75 + log (1.2)

= 3.75 + 0.079

= 3.82

Therefore, 3.82 is the pH of the buffer.

Learn more about pH here:

https://brainly.com/question/27181245

#SPJ4

Answer:

0.0423 L

Explanation:

Molarity can be represented by the following ratio:

Molarity = moles / volume (L)

You can plug the given values into the equation and simplify to find the volume.

Molarity = moles / volume

0.730 M = 0.0309 moles / volume

(0.730 M) x volume = 0.0309 moles

volume = 0.0423 L

Ethanoyl chloride is a common acyl chloride. Any other acyl chloride will function similarly.  Similarly, ethanol is regarded as a typical alcoholic beverage. simply substitute the CH3CH2 group with an alkyl group.

The first stage of the reaction (the addition stage) includes a nucleophilic attack on the relatively positive carbon atom by one of the lone pairs on an ethanol molecule's oxygen.

The second stage (elimination) occurs in two stages. The carbon-oxygen double bond reforms in the first step, releasing a chloride ion.

The ethanoyl chloride then removes a hydrogen ion, yielding ethyl ethanoate and hydrogen chloride.

To learn more about ethanoyl chloride please visit -
https://brainly.com/question/13043444
#SPJ4

The compound  2-bromopentane contains a chiral carbon atom.

So , option D is correct one.

The carbon which is bonded with four different substituent or four valency of carbon is satisfy by the four different substituent is called chiral carbon and the molecule contain such chiral carbon is called chiral molecule. The molecule contain chiral carbon rotates plane polarized light.

Example: The compound  2-bromopentane contains chiral carbon at second carbon and four different substituent at second carbon is methyl , bromine , propyl and hydrogen.

learn more about chiral carbon

https://brainly.com/question/28167696

#SPJ4

The pH of a buffer solution with acid that (PKA 6. 1) is exactly half as concentrated as its conjugate base is 6.4.

A buffer solution is a solution that has a maintained pH, not basic or not acidic. Its pH changes when acid or base is added to the solution.

We had to figure out the acid's concentration, which is exactly half that of its potential base.

We know that pH = pH_log

We have less than 6.1 pH so this is a conjugated base.

This will equal to 6.1 + log2 = 6.4

Thus, the pH of a buffer solution with acid is 6.4.

To learn more about buffer solutions, refer to the below link:

https://brainly.com/question/13169083

#SPJ4

A mutation has occurred directly after the start codon within an mrna sequence. A deletion of two nucleotide provided mutation will have the most serious effect on the resulting polypeptide.

The first codon in mRNA transcript is known as start codon.

Start codon provides initiation signals for the ribosomes to start the process of translation during which formation of polypeptide chain takes place.

It arises when the normal sequence of codon is disrupted by the insertion or deletion of one or more nucleotides, provided that the no. of nucleotide which is added or removed is not multiple of three.

Thus, we concluded that the deletion of two nucleotide make frameshift mutation.

learn more about mutation:

https://brainly.com/question/13923224

#SPJ4

Answer:

4 M

Explanation:

Molarity can be represented by the following ratio:

Molarity = moles / volume (L)

Since you have been given both the mass and volume, you can plug the values into the equation and solve for molarity.

Molarity = moles / volumes

Molarity = 2.0 moles / 0.50 L

Molarity = 4 M

Mass of aluminum = (1.50 m^3)( 2.70 x 10^3 kg/m^3) = 4050 kg 

The intention of density is the assembly per volume of the substance. This is an intrinsic property consequently the size (or any external feature) does not change this effects.

To learn motrev about  Aluminum, refer to:

https://brainly.com/question/246454

#SPJ4

Answer: D

Explanation: 4.05 x 10^3 kg

430 g of AgCl would be needed to make a 4.0m solution with a volume of 0.75 L.

Remember that mol/L is the unit of molarity (M).

We can compute the necessary number of moles of solute by multiplying the concentration by the liters of solution, according to dimensional analysis.

0.75L×4.0M=3.0mol

Then, using the periodic table's molar mass for AgCl, convert from moles to grams:

3.0mol×143.321gmol=429.963g

The final step is to round to the correct significant figure, which in this case is two: 430g.

Hence, 430 g of AgCl would be needed to make a 4.0m solution with a volume of 0.75 L.

Learn more about Molarity here:
https://brainly.com/question/8732513

#SPJ4

"Transition metal elements" are the type of element which have atomic radii which remain relatively constant across a period.

Periods refer to the horizontal lines of the periodic table. Each period represents the sequential occupation of an atom's valence shell orbitals, also with longer periods representing the employment of an atom's d subshell orbitals.

As the atomic number rises, more electrons, as well as protons,  are present, increasing attraction over time, which drives the atomic radius to shrink over time.

Therefore, "Transition metal elements" are the type of element which have atomic radii which remain relatively constant across a period.

To know more about period

https://brainly.com/question/14310368

#SPJ4

The normal boiling point of fingernail polish remover is 56℃  the vapor pressure of fingernail polish remover at the salon 0.027 atmospheric pressure

The pressure exerted by the vapors due to the atmosphere as it is surrounded by it only is known as vapor pressure and its unit is atm.

As air have small molecules which forms multiple layers and create pressure.

vapor pressure = {1/T1 - 1/T2}

T1 = 56 c

T2 = 22 c

substituting the values,

vapor pressure = [ 1/ 56 - 1 / 22 ]

                         = 0.027 atm.

Therefore, the vapor pressure of nail paint remover is 0.027 atm

Learn more about vapor pressure , here:

https://brainly.com/question/8696772

#SPJ4

1.4406 × 10⁻⁶ is the Ka(dissociation constant) for the acid.

The equilibrium constant for the reaction of an acid with water is the acid dissociation constant, where the acid, HA separates into H⁺ and A⁻ ions.

The acid dissociation constant is represented by (Ka).

So let's first imagine that the given monoprotic acid is HA.

HA will dissociate into H⁺ and A⁻ ions.

HA ⇒ H⁺ and A⁻

The formula used for Ka is

Ka = [H⁺] [A⁻] / [HA]

Given

pH = 2.83

[HA] = 1.50 M

From the given pH, we can calculate [H⁺] and [A⁻]

[H⁺] = [A⁻] = 1 × [tex]10^{-2.83}[/tex] =  1.47 × 10⁻³ M

Ka = 1.47 × 10⁻³ × 1.47 × 10⁻³ / 1.50

Ka = 1.4406 × 10⁻⁶

Hence, 1.4406 × 10⁻⁶ is the Ka for the acid.

Learn more about dissociation constant here https://brainly.com/question/3006391

#SPJ4

Answer:

Hypernantremia due to excess water loss

A rare disorder that causes the body to make too much urine

#Brainly

-Levi

Hypernatremia due to excess water loss is a diabetes insipidus. Hence option A is correct.

Hypernatremia is defined as an increase in serum sodium levels to a level greater than 145 mmol/L. Water leaks from the tissues into the bloodstream as a result of hypernatremia, which can induce cell shrinkage. Additionally, it affects the hormone levels that regulate salt levels, leading to an increase in thirst and more concentrated urine production.

Diabetes insipidus is defined as a rare illness that makes you almost insatiably thirsty and produces copious amounts of urine. A brain tumor that affects the hypothalamus or pituitary gland is one of the three most frequent causes of cranial diabetes insipidus. a severe head injury that damages the pituitary or hypothalamus. complications resulting from pituitary or brain surgery.

Thus, Hypernatremia due to excess water loss is a diabetes insipidus. Hence option A is correct.

To learn more about Hypernatremia, refer to the link below:

https://brainly.com/question/14503962

#SPJ2

The electrons that enter the transport chain come from NADH and FADH.

The electron transport chain accepts energy-rich electrons from NADH and FADH 2​ whereas ATP is produced in the previous reactions of aerobic respiration. These processes such as glycolysis, the citric acid cycle, the fatty acid beta-oxidation metabolism, and the oxidation of amino acids occurs before electron transport chain. These processes do the function of transfer of electrons and protons to coenzymes.

So we can conclude that the electrons that enter the transport chain come from NADH and FADH.

Learn more about electron here: https://brainly.com/question/860094

#SPJ1

Answer:

7.44 grams CaCl2 will produce 10.0 grams KCl.

Explanation:

The equation is balanced:

I've repeated it here, with the elements corrected for their initial capital letter.

CaCl2( aq) K2CO3( aq) → 2KCl( aq) CaCO3( aq)

This equation tells us that 1 mole of CaCl2 will produce 2 moles of KCl.

If we want 10.0g of KCl, we need to convert that mass into moles KCl by dividing by the molar mass of KCl, which is 74.55 grams/mole.

 (10.0 grams KCl)/(74.55 grams/mole) = 0.1341 moles of KCl.

We know that we'll need half that amount of moles CaCl2, since the balanced equation says we'll get twice the moles KCl for every one mole CaCl2.

So we'll need (0.1341 moles KCl)*(1 mole CaCl2/2moles KCl) = 0.0671 moles CaCl2.

The molar mass of CaCl2 is 110.98 grams/mole.

(0.0671 moles CaCl2)*(110.98 grams/mole) = 7.44 grams CaCl2

7.44 grams CaCl2 will produce 10.0 grams KCl.

The elements that suits each given property for each of the empty boxes is as described below.

For the first box, the property is that it is a conductor and that it has 2 energy levels. The only possible options here will be Lithium (Li) and Beryllium because they are both conductors and have 2 energy levels. However, among the given elements, only Li is given and as such we will select that.

For the second box, the property is that it is a conductor, it has 3 energy levels and has 2 valence electrons. The only element that falls into this category is Magnesium (Mg).

For the third box, the property is that it is a conductor, it has 3 energy levels and has 1 valence electron. The only element that falls into this category is Sodium (Na).

For the fourth box, the property is that it is not a conductor and has 3 energy levels. The only elements that falls into this category are Silicon(Si), Phosphorus(P), Sulphur(S), Argon(Ar). The only given option is Sulphur(S) and we will pick that.

For the fifth box, the property is that it is not a conductor and has 4 energy levels and 7 valence electrons. The only element that falls into this category is Bromine(Br).

For the sixth box, the property is that it is not a conductor and has 4 energy levels and 5 valence electrons. The only element that falls into this category is Arsenic (As).

Read more about Periodic Table Properties at; https://brainly.com/question/738185

#SPJ1

The theoretical yield isopentyl acetate is of the 1.82 g

Now the theoretical yield is the yield of the product as obtained from the stoichiometry of the reaction. In this case, we know the reaction is 1:1.

Mass of  isopentyl alcohol = 0.810 g/mL * 1.5 mL = 1.215 g

Mass of acetic acid = 1.05 g/mL * 2 mL = 2.1 g

Number of moles of  isopentyl alcohol = 1.215 g/88 g/mol = 0.014 moles

Number of moles of acetic acid = 2.1 g /60 g/mol = 0.035 moles

Hence   isopentyl alcohol is the limiting reactant.

1 mole of   isopentyl alcohol yields 1 mole of isopentyl acetate

0.014 moles   isopentyl alcohol yields 0.014 moles of isopentyl acetate

Mass of of isopentyl acetate = 0.014 moles * 130 g/mol = 1.82 g

Learn more about theoretical yield:https://brainly.com/question/14966377

#SPJ1

The monomers that react together to form polyurethane polymer are diisocyanate and diol.

Polyurethane polymer is made up of monomers diisocyanate and diol. It is mostly used in home furnishing in flexible form. The structures of monomers are as follows:

Learn more about polymers:

https://brainly.com/question/17638582

#SPJ4

Answer: 5kg

Explanation: formula K=1/2mv^2

50=10m

Answer:

C

Explanation:

KE = 1/2 m v^2

KE *2 / v^2   = m

50 (2)/ 10^2   = m =  1 kg

Answer:

20.4 grams Zn

Explanation:

To find the mass, you first need to find the moles. This can be found using the Ideal Gas Law equation:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (0.08206 atm*L/mol*K)

-----> T = temperature (K)

Before you can plug the values into the equation, you need to convert Celsius to Kelvin.

P = 0.980 atm                   R = 0.08206 atm*L/mol*K

V = 7.80 L                          T = 25.0 °C + 273.15 = 298.15 K

n = ? moles

PV = nRT

(0.980 atm)(7.80 L) = n(0.08206 atm*L/mol*K)(298.15 K)

7.644 = n(24.466)

0.312 moles = n

Now that you have the number of moles, you can convert it to grams using the atomic mass of zinc. The final answer should have 3 sig figs to match the sig figs in the given values.

Atomic Mass (Zn): 65.380 g/mol

0.312 moles Zn           65.380 grams
-------------------------  x  -------------------------  =  20.4 grams Zn
                                         1 mole

The symbols for some known elements using the periodic table are given below

Groups/Period

H

He

Li

Be

B

C

N

O

F

Ne

Na

Mg

Al

SI

P

S

Cl

Ar

K

CA

An element is a substance which cannot be split into simpler units by any ordinary chemical process

So therefore, the elements in the periodic table are classified based on their increasing atomic numbers.

The group is vertical representation of the elements

The periods is horizontal arrangements of elements in the periodic table

Learn more about elements:

https://brainly.com/question/11252068

#SPJ1

Answer:

see attachment

Explanation:

plato users!!

Answer:

.75 J / g-°C

Explanation:

Specific heat =   J / gm-C

                   = 7500 J /( 2000 gm * 5 c) =   .75 J / g-°C

Answer:

Explanation:

Hope It Helps!!!!

Answer:

See belwo

Explanation:

First it becomes a compressed gas.... further pressure will cause it to condense into a liquid.