536 cm 53.6 greater, less or equal

Answer:

D.When the boiling points of the components are different

Explanation:

I believe the formal name for this procedure is actually distillation.

Answer:

The columns of the periodic table are called groups. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type. The horizontal rows are called periods.

Answer:

False

Explanation:

The relationship between energy and amplitude can be written as eαa^2

This means that the energy of a wave is directly proportional to the square of the amplitude.

Answer:

The sugar atoms formed new atoms after caramelization.

Explanation:

When sugar is heated to a certain temperature, it becomes caramel. Te formation of caramel from the sugar is a chemical process.

In the context, Pedro is doing an investigation by heating sugar to make caramel. Burning of the sugar crystal is a chemical change as different chemicals are present in both. The caramel formed cannot be revered back to sugar crystal, this also proves the chemical change of caramelization of sugar cubes. Sugar consists of carbon, oxygen and hydrogen atoms. It reacts with atmospheric oxygen atoms to form new groups of atoms and forms caramel.

Answer:

A. krypton

Explanation:

give me brainly

Answer:

young soil has less organic materiel that old

Explanation:

Answer:

Just to prove that the persons answer on top of mine is correct :D

Explanation:

Answer:

Explanation:

8

Answer:

B) fewer in number and less strongly held

Explanation:

If we  look closely at the periodic table from left to right, we will notice that the number of valence electrons increases steadily as we move across the periodic table from left to right.

Metals are mostly at the left hand side of the periodic table while nonmetals are found at the righthand side of the table.

Metals are less electronegative than nonmetals and typically have a lower effective nuclear charge than nonmetals hence the fewer valence electrons of metals are less strongly held(due to less effective nuclear charge) than those of nonmetals.

Answer:

It has 7 electrons in it last shell. it will gain one electron to complete its octet and become Cl-. The ionic bond of chlorine form with potassium is Kcl ( potassium chloride)

To solve such this we must know the concept of ionic reaction. Cl is the element could gain one electron to form an ionic bond with potassium.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound.

Potassium will act as cation as K⁺, chlorine has 7 electrons in it last shell, it can gain one electron to complete its octet and become Cl⁻. The ionic compound of Cl with K is KCl.

Phosphorus has 5 electrons in its last shell it so, it needs 3 more electron to get stable .Sulphur has 6 electron, it needs 2 electrons to get stable. Argon is already stable as it has 8 electrons in its last shell so, it will not gain or loose any electrons.

Therefore, Cl is the element could gain one electron to form an ionic bond with potassium.

Learn more about the chemical reactions, here:

https://brainly.com/question/3461108

#SPJ2

Answer:

The lowest possible melting point for engine coolant is -12.8°C

Explanation:

This is about colligative property about freezing point depression.

We think the data 30% as a %m/m. It means that 30 g of ethylene glycol are contained in 100 g of solution. Therefore, we have 70 g of solvent.

Formula for freezing point depression is:

ΔT = Kf . m . i

Where  ΔT = Freezing T° of pure solvent - Freezing T° of solution.

Freezing T° of solvent = 0° (We talk about water)

Let's determine m (molality, moles of solute in 1kg of solvent)

70 g = 0.070 kg

30 g . 1 mol / 62.07 g = 0.483 moles

0.483 mol / 0.070 kg = 6.90 m

We replace data in formula:

0° - Freezing T° of solution = 1.86 °C/m . 6.90m . 1

As ethylene glycol is a nonelectrolyte, i = 1

Freezing T° of solution =  - 12.8°C

Answer:

V₂ =  1.92 L

Explanation:

Given data:

Initial volume = 0.500 L

Initial pressure =2911 mmHg (2911/760 = 3.83 atm)

Initial temperature = 0 °C (0 +273 = 273 K)

Final temperature = 273 K

Final volume = ?

Final pressure = 1 atm

Solution:

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

by putting values,

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 3.83 atm × 0.500 L × 273 K / 273 K × 1 atm

V₂ = 522.795 atm .L. K / 273 K.atm

V₂ =  1.92 L

Answer:

Yes.

Explanation:

Yes, elevation play a great role and has the ability to protect homes from natural disasters such as flood and tsunami etc. The residents build a hard structure of wall along the beach that would prevent a tsunami from reaching the community and also built homes at higher elevation. The residence built it with the help of government and this wall is also effective in reducing the erosion of the beach.

Answer:

1. Yes elevation does play a factor if the house was higher i feel like it wouldnt get as damaged  

2.  Yes they could build a high enough wall that it would take most of the impact away from the houses, you would build it with the thickest peice of wood that you could find and use long screws and cement the  wood into the ground.  

3. The wall will also help from erosion

Explanation: i got it right on my project.

Answer:

2.64 ×[tex]10^{-26}[/tex] J

Explanation:

I think you should mark it a physics question instead but anyway.

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The Planck equation should be applied:

E = hv , while E is energy of proton; h is Planck constant; and v is frequency.

E = 6.6 × [tex]10^{-34}[/tex] × 4 × [tex]10^{7}[/tex]

  = 6.6 × 4 × [tex]10^{-27}[/tex]

  = 2.64 ×[tex]10^{-26}[/tex] J

The mass of Copper deposited at the cathode : 0.296 g

Given

time = t = 10 min=600 s

current = i = 1.5 A

F = 96500 C

charge Cu=+2

Required

The mass of Copper

Solution

Faraday's Law

[tex]\tt W=\dfrac{e.i.t}{96500}[/tex]

e = Ar/valence(valence Cu=2, Ar=63.5 g/mol)

Input the value :

[tex]\tt W=\dfrac{63.5/2\times 1.5\times 600}{96500}\\\\W=0.296~g[/tex]

Answer:

It is the "Bhor's Model"

Explanation:

Nearly two-thirds of the students ranked the electron cloud and Bohr-model as their two most preferred representations. Students invoked ideas from classical mechanics to interpret the electron cloud model and used probabilistic language to describe the Bohr model of the atom.

Volumes of ethanol and water are in the solution : 30 mL and 70 ml

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Percent Volume (% v/v) : volume (ml) of solute/100 ml of solution ⇒ ratio of volume of the solute to total volume of the solution

[tex]\tt \%solute=\dfrac{solute~volume}{solution~volume}\times 100\%[/tex].

30% ethanol ⇒30% etanol, 70% water

In 100 mL solution :

[tex]\tt Ethanol=30\%\times 100~mL=30~mL\\\\Water=70\%\times 100~mL=70~ml[/tex]

Answer:

80 grams

Explanation:

Normality is one of the units of concentration and it is derived by dividing the gram or mole equivalent of the solute in a solution by the volume (in liters) of the solution.  

The equivalent weight of NaOH is derived by dividing the molecular weight of the compound by 1. Hence, the equivalent weight of NaOH in 1 normal solution is 40/1 = 40 g.

If 1 normal NaOH solution contains 40 g of NaOH in 1 liter of the solution, then a binormal (2 normal) solution of NaOH would contain;

   2 x 40 = 80 g of NaOH.

Answer:

Liquid

Explanation:

If a phase is skipped, the skipped phase will be liquid because it is the only phase between solid and gas.

Answer:

liquid

Explanation:

sublimation, is when a substance goes directly from a solid to gas. it doesn't pass through the liquid state.

Answer:

1s^2   2s^2   2p^6    3s^2    3p^6    4s^2    3d^10   4p^6    5s^2    4d^2

Explanation:

Answer:

Mass = 1080.26 g

Explanation:

Given data:

Number of moles of LaPO₄ = 4.56mol

Mass in gram = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of LaPO₄ = 236.9 g/mol

by putting values,

4.56 mol = mass/ 236.9 g/mol

Mass = 4.56 mol  × 236.9 g/mol

Mass = 1080.26 g

Answer: C.  

Explanation: These offspring inherited a DNA sequence coding for white flowers from each parent plant.

:)

E cell = 1.962 V

Given

E° cell = 2.00 V

Required

E cell at 298 K

Solution

The potential cell for nonstandard conditions we can use the Nernst equation  

[tex]\rm E = E ^ o -\dfrac {RT} {nF} lnQ[/tex]

For temperature T = 298 K,  

[tex]\rm E = E ^ o -\dfrac {0.0592V} {n} log \: Q[/tex]

Reaction

3A(s) + B+3(aq) → 3A+(aq) + B(s)

Half Reaction

3A(s)⇒3A⁺(aq)+3e⁻

B⁺³(aq)+3e⁻⇒B(s)

n = 3 (3 electron transfer)

Q = the reaction quotient  :

[tex]\tt Q=\dfrac{[A^+]^3}{[B^{+3}]}=\dfrac{0.5^3}{1.5.10^{-3}}=83.3[/tex]

E cell :

[tex]\tt E_{cell}=2-\dfrac{0.0592}{3}log~83.3\\\\E_{cell}=1.962~V[/tex]

Answer:

check explaination

Explanation:

Q. 4:

a) 7 ml

b) 9 ml

c) volume of rock = volume of column (with rock in it) - volume of column (without rock)

= 9-7

= 2 ml

d) density = mass ÷ volume

therefore, mass = volume × density

= 2 × 3 => 6 g

Q. 5:

1st has the highest density

this is because, density = mass ÷ volume

as volume is constant , density is directly proportional to mass

as image 1 has more number of molecules, it's mass will be maximum.

therefore, 1st image will have maximum density

Answer:

Magnetic: Iron and nickel

Nonmagnetic: Rubber, feathers and/or leather

Explanation:

Hope this helps!

Answer:

false it is a chemical change