What correctly describes the melting of a solid

The particles in the solid LOSE enough energy to OVERCOME the interactions between the particles

The particles in the solid GAIN enough energy to FORM the interactions between the particles

The particles in the solid GAIN enough energy to OVERCOME the interactions between the particles

The particles in the solid LOSE enough energy to raise the temperature of the solid enough to turn it into a
liquid

Answers

Answer 1

Answer:

A reaction in which heat is absorbed by reactant molecules and energy of products become more than reactants is known as an endothermic reaction


Related Questions

If a sample of water has a mass of 200g and the final solution has a mass of 230g, how much solute dissolved in the water?

Answers

What is the difference between the two numbers? That is your answer

HELP! Fill in the blanks:
The net charge of an atom is equal to the difference between the_____
in the atom's nucleus and the_____

Answers

Answer:

I don't know

Explanation:

is today your test

1. If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.

2. The nucleus of an atom is the atom's dense and heavy core with a positive charge




I’m not so sure about the second one but I hope I helped :)

La temperatura más baja registrada en EEUU fue de - 70 °F (en Roger Pass montana). Exprese esta temperatura en °C

(Porfavor ayudenme)​

Answers

Answer:

[tex]thank \: yo[/tex]

Which of the following are decomposition reactions?
A. CH4 (9) +202 (9) - CO2 (g) + 2H20 (9)
B. N2 (9) + 3H2 (9) ► 2NH3 (9)
C. CaCO3 (s) - Cao (s) + CO2 (9)
D. 2H20 (1) ► 2H2 (9) + O2 (9)

Answers

Answer:

C and D

Explanation:

A reaction is said to be decomposed, if the reactant is broken down to liberate single element.

Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?
three metallic bonds

two ionic bonds

four covalent bonds

one covalent bond

Answers

Four covalent bonds are formed as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA.

The periodic table is composed of eighteen groups and eight periods. The common thread that holds all the elements in a group is that they all have the same number of valence electrons in their atoms. The elements in the same period all have the same highest energy level.

Oxygen in group Group VIA has six valence electrons while carbon in group Group IVA has four valence electrons. Hence, the chemical bond in carbon dioxide CO2 must contain four covalent bonds as shown in the image attached to this answer.

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Answer:

Four Covalent bonds

Explanation:

Which of the following are considered physical properties of a substance?
Color and odor
malleability and hardness
melting and boiling points
all of the above

Answers

hi <3

the correct option would be all of the above

hope this helps :)

All of the above I’ve answered this question before

A researcher wants to conduct an experiment to see how the amount of breakfast a student eats
affects their performance in school. He makes 2 groups, one group consumes 300 calories in
the morning while the second group does not eat breakfast at all. After 2 weeks he compares
the students test scores and every student takes the same tests. Identify the following:
a. Control Group:
b. Independent Variable:
c. Dependent Variable:

Answers

The control group are the students who eat no breakfast. The independent variable is the consumption of breakfast. The dependent variable is the performance of students in school.

In an experiment, the control group is the group that did not receive the treatment. The treatment in this case is the consumption of breakfast. Hence the group that did not consume breakfast is the control group.

The independent variable is the variable that is being manipulated and its effect evaluated. The manipulated variable here is consumption of food.

The dependent variable is the variable that is being measured. In this case, it is the performance of students at school.

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Which two elements have the same number of energy levels with electrons in them?(1 point)

A_ krypton and neon

B_ boron and oxygen

C_ lithium and francium

D_ neon and sodium

Answers

Its B) Boron and Oxygen

The correct answer is B.

boron and oxygen have the same number of energy levels with electrons in them.

The energy level of an element is the region around the nucleus where its electron is likely to be, this corresponds to the period of the element in the periodic table.

Elements found in period 1, have one energy level.

Elements found in period 2, have two energy level.

Examples of elements found in period 2 include:

lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon

In the given options, only option B contains two elements with 2 energy level.

Thus, boron and oxygen have the same number of energy levels with electrons in them.

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Please help me with this chemistry

Answers

Answer:

D=1.56g/mL

Explanation:

Density=m/v

D=14.06g/(24mL-15mL)

D=14.06g/9mL

D=1.56g/mL

briefly explain how to separate a mixture of water, kerosene, sawdust and nahso4? ​

Answers

Answer:

Use filtration method lol.

A sample of brass weighing 1.203g was analyzed. The zinc in the alloy was reacted with 35.123g of HCl in excess, according to the balanced equation:
Zn (s) + 2HCl(aq) - > H2(g) + ZnCl2 (aq)
After all the zinc reacted, the mass of the remaining solution weighed 36.309g

What was the mass of H2 produced?
What mass of Zn reacted?
What was the percentage of Zn (by mass) in the alloy?

Answers

The number of moles of reactants and products can be used to obtain the mass of products formed. The results obtained are as follows;

The mass of hydrogen produced is 0.0174 gramsThe mass of zinc produced is  0.5688 gramsThe percentage by mass of zinc in the brass alloy is 47.3 %

The question says that HCl was in excess. It means that after the reaction, we will have unreacted HCl(aq) and  ZnCl2(aq) in the remaining solution.

Hence;

Mass of ZnCl2(aq) formed = 36.309g - 35.123g  = 1.186g

Number of moles ZnCl2(aq) formed = [tex]\frac{mass of ZnCl2(aq) formed}{molar mass of ZnCl2}[/tex]

[tex]\frac{1.186g}{136.286 g/mol}[/tex] = 0.0087 moles

From the reaction equation;

[tex]Zn (s) + 2HCl(aq) - > H2(g) + ZnCl2 (aq)[/tex]

To obtain the amount of Zn reacted

1 mole of Zn yields 1 mole of ZnCl2

x moles of Zn yields 0.0087 moles of ZnCl2

x = 0.0087 moles of Zn

a) 1 mole of Zn yields 1 mole of H2

0.0087 moles of Zn yields 0.0087 moles of H2

Mass of H2 = 0.0087 moles of H2 * 2 g/mol = 0.0174 grams

b)

Mass of Zn reacted =  0.0087 moles of Zn * 65.38 grams/mole = 0.5688 grams

c)

Percentage of Zn in the alloy = 0.5688 grams/1.203g * 100 = 47.3 %

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WILL MARK BRAINLEST IF CORRECT!
1) Burning toast physical or chemical
2) Cooking eggs: physical or chemical
3) Melting butter: physical or chemical
4) Removing the pulp (solid) from the orange juice using a juice strainer.: physical or chemical
5) Cutting the toast with a knife: physical or chemical
6) Digesting the food: physical or chemical

Answers

Boi what the hell boi
1) Chemical
2) Chemical
3) Chemical
4) Physical
5) Physical
6) Chemical

Vapor pressure of any liquid _______. A. increases with increases in temperature B. increases with decreases in temperature C. is not affected by changes in temperature D. increases with increases in volume of the liquid E. None of the Above

Answers

Answer:

increase with increases in temperature

Explanation:

please mark me brainleast

Come up with 2 examples of derived units from everyday life.

Answers

Answer:

answer

Explanation:

Area : Square Meters,

Volume : Cubic Meters,

Density : Kilograms per Meter Cube,

Velocity : Meters per Second Squared,

Force : Newtons (Mass multiplied by Acceleration or Mass multiplied by Displacement divided by Time squared)…..

in which sell duplet rule is applied, why?​

Answers

Answer:

its in explanation

Explanation:

the tendency for items have 2 electrons in their outermost shell by interacting with others items through electron sharing or transfer is known as duplet rule. if an atom has 2 electrons in it's outermost shell then it is called duplet rule and if a 8 electrons in it's outermost shell than it is called octet rule .

Solid solid soluton example​

Answers

Explanation:

rice and rice coatssalt and sugarsand and mudwheat flour and corn flour

What are the answers to these?

Answers

Answer:

1)physical change

Explanation:

2)chemical change

Helppppp….. is this right?

Answers

Answer:

Yes, it is correct.

Explanation:

400 cm = 4 m

40 m = 40 m

0.4 km = 400m

Therefore, 400 cm < 40 m < 0.4 km

Answer:

Explanation:

400 centimeter....... smallest

0.4 kilometer .............. middlest

40 meter..................... greatest

Behind your house, there's a gorgeous pond filled with frogs. You notice that the frogs behind Mr. Archer's house often have three legs. You start wondering if the fertilizer that Mr. Archer uses for his lawn is causing the deformities in the frogs. You collect 10 frogs and put the special fertilizer in their container (Group A). You put another 10 frogs and place them in a different container with just water (Group B). A week later, 7 out of 10 of the frogs in group A grew only three legs. The frogs in group B grew four legs.



What was the control group?

Answers

Answer:

Group B is the control group

Explanation:

In an experiment, a control group is the standard to which comparisons are made in an experiment.

Can someone plz help me? Plzz giving brainliest!

(Plz chose 3 questions)

Answers

Answer:

Facts: A D and maybe C I think you are intended to say C

Explanation:

A is certainly not an opinion. It is either true, or it is not. I think it is intended as a fact.

B is an opinion (which I think is true)

C is kind of iffy. It might be true and it might be an opinion. In looking it up, it is factually incorrect. Cats are related to wildcats in the middle east.

D is also iffy. They can just eat disease free rodents. I'd classify it as more opinion than fact.

E. definitely an opinion.

Classify vodka (composed of 50% water and 50% alcohol).

Answers

Answer:

Liquor

Explanation:

what is sublimation ​

Answers

Explanation:

Sublimation is the conversion of a substance from the solid to the gaseous state without its becoming liquid. ... Freeze-drying of food to preserve it involves sublimation of water from the food in a frozen state under high vacuum. See also vaporization; phase diagram.


May someone help me with the answer to this question I’ve been stuck on it

Answers

Explanation:

No, that would be incorrect

Answer:

There arre two main parts of the atom, the nucleus and the orbital rings. The three subatomic particles are contained in each of these, the proton and neutron together in the nucleus and the electrons orbiting in the rings.

ANSWER QUICK PLEASE!!!! 25 POINTS
Acrylonitrile and ethyl acetate have the same boiling point: 77.2ºC. In one to two sentences, explain what outcome you would expect if a mixture of these two substances were distilled.

Answers

The two substances can never be separated by distillation because distillation depends on difference in boiling point.

Distillation is a separation method that depends on difference in boiling point between two substances.

Usually, the substance having a lower boiling point is collected first as the temperature is gradually raised. The substance having a higher boiling point then follows.

However, since the two substances have the same boiling point, they can not be separated by distillation because they will be converted to vapor simultaneously thereby making separation impossible.

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Câu 3: Nêu phương pháp hóa học nhận biết các dung dịch không màu sau: (a) HCI, NaOH, H2SO,, NaCl. (b) HNO3. KOH, BaCl. Ca(OH)2. Ba(NO3)2 (c) MgCl2, KCl, CuCl2, FeCl3, FeCl2 (chỉ dùng một thuốc thử). (d) Na2CO3, BaCl2, NaNO3 (chỉ dùng một thuốc thử)

Answers

Answer:

uvo 8hih8hjfiuwubosbwbhp0heg

gots another for you guys thanks inn advance

Answers

Answer:

c. the center of curvature of the two sides of the lens

Which of the following statements is not true about ecosystems?

a. A healthy ecosystem can support an unlimited number of life forms.
b. Predators play a role in balancing the earth's ecosystems.
c. People's activities can improve the health of an ecosystem.
d. The parts of an ecosystem depend on each other.

Answers

Answer:

A

Explanation:

though an ecosystem can support life forms,when they become over populated or unlimited there will be competition for food,Shelta and other basic necessities which will lead to many of these life forms dying

Second ionization energies are always _____ than first ionization energies because the remaining electrons are attracted _____ strongly as the positive charge on the ion increases. A large jump in ionization energies is always observed after the _____ electrons have been removed.

Answers

greater

more

remaining

Pb(NO3)2 + ? = PbCl2 +?

Answers

Answer:

HCL, H2

Explanation:

Assuming this is a Redox reaction, we know that metal + acid = salt + hydrogen therefore we can say it is HCL and H2

i got the total but can’t get these ???

Answers

Answer:

Volume of heptane in cylinder = 51.2mL

Volume of water = 33mL

Explanation:

Density(g/mL) = mass/ Volume

》Volume = mass/ Density

Please prompt me if I'm wrong in my workings. Hope this helped.

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