A solid turning to a liquid is called..?

Answers

Answer 1

Answer:

A physical change.

Explanation:

Have a wonderful day!

Answer 2
the answer is physical change

Related Questions

How many liters of 3^He are present in 22 moles of gas?

Answers

Look it up on goggle

4. When the mole fraction of solute is 1, there is
(a) a 1:1 ratio of solute to solvent.
(b) no solute present.
(c) only solute present.
(d) only solvent present.
(e) 1 mole of solute and 99 moles of solvent.

Answers

Answer:

(c) only solute present

Explanation:

In chemistry, the mole fraction, denoted by X, refers to the number of moles of a substance in a compound/mixture divided by the total number of substances in the same compound or mixture.

In this case, we can say that mole fraction represents the number of solutes to the number of solutes and solvent in the solution i.e. X = nA/nA + nB

Where; nA = number of solutes

nB = number of solvent

X = mole fraction.

Based on this analogy, When the mole fraction of solute is 1, there is only solute present. That is; X = 1 / 1 + 0

X = 1/1 = 1.

Calculate the percentage composition of Aluminum, Sulfur & Oxygen in the compound of Al(SO4)3

Answers

Answer:

Percentage of O = 56.1 %

Percentage of Al =15.8%

Percentage of S = 28.1 %

Explanation:

Given compound Al₂(SO₄)₃

Molar mass of compound:

27×2 + 32×3 + 16×12 = 342 g/mol

Percentage of Al = ( Mass of Al / Total mass ) × 100

Percentage of Al = 54 /342 × 100

Percentage of Al =15.8%

Percentage of S = ( Mass of S / Total mass ) × 100

Percentage of S = 96 /342 × 100

Percentage of S = 28.1 %

Percentage of O = ( Mass of O / Total mass ) × 100

Percentage of O = 192 /342 × 100

Percentage of O = 56.1 %

Thomson's plum pudding model of the atom was most directly replaced or refuted by
a. Rutherford's discovery that atoms contain a nucleus
b. Chadwick's discovery of the neutron
c. Goldstein's discovery of protons
d. Democritus's idea that the atom is indivisible

Answers

Answer:

A. Rutherford's discovery that atoms contain a nucleus

Explanation:

Answer:

A is the answer

Explanation:

The magnifying power of a telescope is computed by dividing the focal length of its objective by _______.

Answers

Answer:

by focal length of the eyepiece.

Explanation:

hope it helps!!plz mark as brainleist.

Beta particles will:
1. Not be affected by either pole of a magnet
2. Bend toward the North Pole of a magnet
3.bend toward the South Pole of a magnet

Answers

Answer:

3 ans

Explanation:

bend toward the south pole of a magnet

When chemists convert ethene (C2H2) to ethanol (CH3CH2OH), they have a mixture of the two gaseous substances. Why do chemists then lower the temperature of the mixture?

Answers

Answer:

to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds    

Explanation:

The chemist would be lesser than the temperature of the mixture as to collect the liquid ethanol and then leave ethene as a gas since the ethanol is a bond that should be hydrogen. Also -OH that available in the ethanol would be responsible for the hydrogen bonds also it is the main and significant molecular forice

So as per the given situation the above represent the answer

Answer:

to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds    

Explanation:

Will get brainliest.

Answers

Answer:

1.00 g

Explanation:

got it on pex

Which of the following is NOT a compound?
Table salt
Carbon dioxide
Water
Gold

Answers

Answer: Gold.

Explanation: Water, CO2, and table salt are compounds. They are composed of two or more separate elements; a mixture, where as gold is neither.

Gold is not a compound

Describe how wind, water, ice and gravity move soil through erosion below.
PLEASE ANSWER!!!! :D

Answers

Answer:

Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier). If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in the fluid (air or water) and being transported from one place to another. This transported material is called sediment.

Explanation:

we are lerning this tooo

Are the activities exothermic or endothermic?​

Answers

Answer:

The first 5 are exothermic reaction because heat is in product means heat is evolved or given out.

And last no reaction shows that heat is required so last reaction is endothermic reaction.

Explanation:

And heat is evolved in exothermic reaction and heat is absorbed in endo thermic reaction

Number 2 & 3 please !!<3

Answers

Answer:just for the ponits

Explanation:ima be a jenna

what is a unique characteristic of covalent bonding between nonmetal atoms
a) atoms give away electrons to reach a stable octet
b)atoms share valence electrons with neighboring atoms to reach a stable octect.
c)atoms gain electrons to reach a stable octet
d)delocalized electrons move freely among many positive atoms creating a ''sea'' of electrons

Answers

Answer:

The answer isssssssssssssss DRUM ROLL PLEASEEE

Explanation:

B

Considering the definition of covalent bonds,  the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.

Covalent bonds are the forces that hold non-metallic atoms together. These atoms have many electrons at their outermost level (valence electrons) and have a tendency to gain electrons rather than give them up, to acquire the stability of the noble gas electronic structure. Therefore, non-metallic atoms cannot give electrons to each other to form ions.

In other words, a covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their most superficial shell (called the valence shell) to achieve the stability of the molecule that has been formed with the bond and thus comply with the octet rule.

In summary, the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.

Learn more:

https://brainly.com/question/12661797?referrer=searchResultshttps://brainly.com/question/7591319?referrer=searchResults

what demonstrated Kinetic Energy

Answers

Kinetic Energy Statement

Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an object times its velocity squared.

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic energy.

Hope this helped!

❤️

Question 6
Use the mole concept to calculate the number of formula units that are in a 1.75-mol sample of NaCl.

Answers

Answer: There are [tex]10.5\times 10^{23}[/tex] formula units in 1.75 mol sample of NaCl.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

1 mole of NaCl contains = [tex]6.023\times 10^{23}[/tex] formula units

Thus 1.75 mol of NaCl contains = [tex]\frac{6.023\times 10^{23}}{1}\times 1.75=10.5\times 10^{23}[/tex] formula units

Thus there are [tex]10.5\times 10^{23}[/tex] formula units in 1.75 mol sample of NaCl.

Cu(NO3)2 is what compound?

Answers

Answer:

the compound's name is copper nitrate

The diagram represents the path of a ball that has been thrown upward. Discuss how the kinetic energy (KE), gravitational potential energy (GPE), and total mechanical energy (ME) change between points A (where the ball is thrown from), B (the highest point reached by the ball), and C (where the ball hits the ground). Ignore friction between the ball and the air. (3 points)

Answers

Answer:

Gravitational potential energy: [tex]GPE_{B}>GPE_{A}>GPE_{C}[/tex]

Kinetic energy: [tex]KE_{B}<KE_{A}<KE_{C}[/tex]

Total mechanical energy: [tex]ME_{A}=ME_{B}=ME_{C}[/tex]

Explanation:

The gravitational potential energy is directly proportional to height ([tex]GPE_{B}>GPE_{A}>GPE_{C}[/tex]). Since there are no non-conservative forces, the total mechanical energy is conserved ([tex]ME_{A}=ME_{B}=ME_{C}[/tex]) and the total mechanical energy is the sum of gravitational potential and kinetic energies. Then:

[tex]GPE_{A} + KE_{A} = GPE_{B} + KE_{B} = GPE_{C} + KE_{C}[/tex] (1)

If we know that [tex]GPE_{B}>GPE_{A}>GPE_{C}[/tex], then we conclude the following inequation for the kinetic energy:

[tex]KE_{B}<KE_{A}<KE_{C}[/tex] (2)

Which are reasons to create a study schedule? Check all that apply.

to prevent scheduling conflicts
to help meet deadlines
to study more efficiently when tired
to maintain a consistent schedule
to set aside enough time for studying
Mark this and return

Answers

Answer - A, B, D, E

to prevent scheduling conflicts

to help meet deadlines

to maintain a consistent schedule

If the [H+] of a solution is 6.8 x 10-9 mol/L the pH is

Answers

Answer:

8.2

Explanation:

To solve this problem;

 The concentration of [H⁺]   = 6.8 x 10⁻⁹mol/L

So, we need to convert this to pH:

           pH  = -log [H⁺]

So;

          pH  = -log 6.8 x 10⁻⁹ = 8.2

A student measures 10 g of baking soda and mixes it with 5 grams of vinegar. The mixture begins to bubble and fizz and feels cold to the touch. Once the reaction is over the student weighs the solution and discovers that the resulting mixture weighs only 12g. What happened to the missing 3 grams of product? Use the Law of Conservation of Matter in your answer.

Answers

Answer:

Some of the product is a gas that goes to the atmosphere.

Explanation:

Based on the chemical reaction of baking soda (Sodium bicarbonate: NaHCO₃) with vinegar (Acetic acid: CH₃COOH):

NaHCO₃(aq) + CH₃COOH(aq) → H₂O(aq) +  CO₂(g) + CH₃COONa(aq)

When the reaction occurs, one of the products (CO₂) is a gas that will disappear of the mixture to stay in the atmosphere. That is the reason why there are missing 3 grams.

how many mercury atoms are contained in 0.37 moles of mercury?

Answers

It should be around 74.21

Which of the following is one part of a chemical formula for a molecule?
A) A number that shows the total number of chemical bonds
B) Numbers that show how many atoms of each element are in the molecule
C) A number showing the atomic masses of each element
D) A Lewis dot diagram for the molecule

Answers

B) numbers that show how many of each element are in the molecule.

according to the Aufbau principle, which principle energy level would have higher energy, n=2 or n=5?

Answers

Answer:b

Explanation:

Give some tips on how to take care of your microscope.

Answers

Answer:

dont get it wet or it wont work at all

Always handle it with care, carry it from the base at all times store your microscope safely and don’t play with the lens always keep the lens covered clean the microscope lens after every use to get rid of any oils from skin

A container with a volume of 893L contains how may moles of air at STP?

Answers

Answer:

i think 54

Explanation:

In the container with a volume of 893 liters, there are 39.9 moles of air at STP conditions.

We can find the number of moles with the Ideal gas law equation:

[tex] PV = nRT [/tex]

Where:

P: is the pressure = 1 atm (STP)

V: is the volume = 893 L

n: is the number of moles =?

R: is the gas constant = 0.082 L*atm/(K*mol)

T: is the temperature = 273 K

Hence, the number of moles is:

[tex] n = \frac{PV}{RT} = \frac{1 atm*893 L}{0.082 L*atm/(K*mol)*273 K} = 39.9 moles [/tex]

Therefore, there are 39.9 moles in the container.

You can find more about Ideal gas law here: https://brainly.com/question/4147359?referrer=searchResults

I hope it helps you!

           

Which of the following is an example of a velocity?
O A. 3 m/s south
O B. 2 km/hr
O C. 8 m/s
O D. 12 m/s2 east

Answers

Answer:

A

Explanation:

velocity is a vector quantity, it has single direction.

B and C are speed while D is acceleration

Please recheck, for this may not be the correct answer

Answer:

i think its A or C

Explanation:


Complete the graphic organizer.
Basic Parts of an Atom

Answers

Answer:

I'm not sure but I think the answer is electrons, protons and neutrons.

Please help me this is my science final

Answers

Answer:

1.Winter

2.Autmn

3.Summer

4.Spring

I hope this helps!

1- winter
2- autumn
3- summer
4- spring

What is the cation and anion for Aluminum chloride

Answers

Answer:

For, Aluminum chloride, aluminum = AL+ so here aluminum is the cation

But Chloride is the anion = CL -

So cation is positive and anion is negative

Using the models of the molecules below, (H2 and CH4) what does it mean for a molecule to be symmetrical?

Answers

Answer:

A molecule is symmetrical if it can be cut into two identical halves.

Explanation:

H2 can be written as H + H

CH4 is not a symmetrical molecule

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