Chemistry High School

I literally forgot!
What is chemistry?​

Answers

Answer 1

Answer:

Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes

Answer 2

Answer:

hope it helps you a little

I Literally Forgot! What Is Chemistry?

Related Questions

What are all the secrets to the universe ?

Answers

In outer space since we don’t know where to look on earth probably
the milky way we don’t know everything and we probably never will

Based on the chemical formula and state of matter, which of these substances will conduct electricity?

CuSO4(s)

CuSO4(aq)

C5H12(l)

CO2(g)

Answers

Answer:

CuSO4(aq)

Explanation:

The aqueous form of copper sulfate will conduct electricity.

The Solid form will not be a good conductor.

C₅H₁₂ will not conduct electricity

CO₂ will not conduct electricity

Copper sulfate is an ionic compoundIn aqueous solutions or molten forms, ionic compounds can conduct an electric current using free mobile ions as carriers. This way, they are electrolytes. In solid state, the ions are arranged into a crystal lattice and will not conduct a current of electricity.

What element is in period 6 with 2 valence electrons?

Answers

Answer:

Barium

Explanation:

I think that's the answer

The element in period 6 with 2 valence electrons is Barium.

The periodic table has been organized into periods and groups. The period is in an horizontal arrangement while group is vertical arrangement.

The elements that can be found in period 6 are Beryllium, Magnesium, Calcium, Strontium, Barium etc.

Elements in the same group have the same number of valence electrons. This means that elements in group 2 have 2 valence electrons.

Barium possess two valence electrons because it is in group 2 and it is also in period 6. Therefore, the element in period 6 with 2 valence electrons is Barium.

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A double replacement reaction is a reaction in which one element replaces a similar
element within a compound. (2 points)
True
False

Answers

Answer: False

Explanation:::

Answer:

false

Explanation:

in a double reaction, the negative ions switch places. not be replaced.

When an egg is boiled in a pot of water on the stove, there is more than one kind of heat transfer. Heat is transferred from the stove to the pot directly since they are physically touching. Heat is also transferred from the pot to the egg, carried through the water.

Answers

Answer:

Stove → Pot = conduction, Pot → Egg = convection.

Explanation:

There are three ways in which heat is being transferred from one medium to the other and the means are; radiation, conduction and convection heat transfer.

Radiation is the process in which heat is being transferred through emission in form of electromagnetism. Conduction heat transfer Is the process in which heat is being transferred through contact that is two bodies touching each other. Convection heat transfer is the kind of heat that happens through gases.

Since the heat from the stove touching the pot is the conduction heat transfer.

After the water has been heated up, the gas from the water makes the convection heat transfer.

The arrow in a chemical equation represents the ________________ _________________

Answers

It represents the end product

Is iron rusting a chemical reaction? Explain why or why not.

Answers

Answer: Yes- Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur. Rusting is an example of a chemical change. A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust.

Hope this helps.... Stay safe and have a Merry Christmas!!!!!!!!!!!! :D

when hydrogen atom absorbs a photon, and an electron moves level 1 to level 2, what happens to the energy of the atom?

Answers

Answer:

When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. One way of thinking about this higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon).

Explanation: pls mark brainliest :))

Which of the following combinations of quantum numbers (n, l, ml, ms) do NOT represent permissible solutions of the Schrodinger equation?

6, 5, -5, ½

6, -5, -1, ½

8,2,2, ½

All are allowed

9, 8, -4, ½

Answers

Explanation:

6, -5, -1, 1/2 is wrong because the angular momentum quantum number cannot be negative.

second one is wrong since it can’t be negative

what are the names of these compounds??

CCI4

K2O

Answers

Answer:

CCI4   Carbon tetrachloride

K2O Potassium oxide

Explanation:

2. DETERMINE THE TEMPERATURE AT
WHICH NIO GRAMS OF POTASSIUM
NITRATE DISSOLVE IN 100 GRAMS OF
WATER

Answers

Answer:

20 degrees Celsius

Explanation:

What is the name of the family with an oxidation number of +2?
a. Halogens
b. Alkali Earth Metals
c. Noble Gasses
d. Transition Metals

Answers

Answer:

Alkali Earth Metals

Explanation:

The oxidation number is equal to the charge which is determined by the valence electrons. Alkali Earth Metals all have 2 valence electrons and, therefore, an oxidation number of 2.

Answer:

+2alkaline earth metal and +1 oxidation number is alkali metal

Explanation:

alkali is Arabic word means ash

What will a medium mass star become at the very end of its life cycle

Answers

Once it becomes the white dwarf it eventually runs out of fuel and dies as a black dwarf.

What Group is this element in?

Answers

Answer:

sodium

Explanation:

HELPPPPPPPPPPPPPPPPPPPPPP

Answers

Answer:

c

Explanation:

Explain why the mass of carbon must be decreasing in a different step of slow carbon cycle based on the increase in atmospheric CO2

Answers

Answer:

Carbon flows between the atmosphere, land, and ocean in a cycle that ... Coal and other fossil fuels are a convenient source of energy, but when ... If carbon dioxide rises in the atmosphere because of an increase in ... However, the slow carbon cycle also contains a slightly faster component: the ocean.

Explanation:

I got you fam

Ok ok I know this isn’t about schoolwork but can ppl please comment how to ask a boy out?

Answers

just be straight up with him, and don’t overthink it too much. Also don’t beg him if he says he doesn’t feel the same :)

Answer:

depends on the boy but don't try to hard be cool and just go for it 90 percent of the time they'll say yes

Explanation:

plsss help
will mark BRAINLIEST

Answers

Answer:

c

Explanation: just a chemachal

What is the redox reaction? And how does the redox reaction happen inside batteries?

Answers

Answer:

It is called a reduction-oxidation, oxide-reduction reaction, or simply as a redox reaction, any chemical reaction in which one or more electrons are transferred between the reactants

Redox battery is an example of both a Flow Battery and a two electrolyte system.In this case, it depends on two different active aqueous electrolytes of vanadium dissolved in sulfuric acid separated by a membrane at which ionic interchange takes place.

Thats my opinión though.

How do HOT AIR BALLOONS work when ascending and descending explain in terms of gas behavior?

Answers

Answer: Animation: Burning gas makes the air inside the balloon less dense, producing an upward force or lift. 1) A hot air balloon stays on the ground (or descends) when the air inside it is too cool. ... 3) When the air is hotter still, the balloon rises because the lift force is greater than the weight.

Explanation:

Common sense

Which of the following atoms has the highest first
ionization energy?
a. helium
6. potassium
d. hydrogen
e. carbon

Answers

Answer:

Helium

Explanation:

The first ionization energy varies in a predictable way across the periodic table.

What would be the mass, in grams, of 1.505 x 10^23 molecules of carbon disulfide (CS2)?

Answers

To Find :

The mass, in grams, of [tex]1.505 \times 10^{23}[/tex] molecules of carbon disulfide (CS₂).

Solution :

Molecular mass of CS₂ = 76 gm/mol .

It means that mass of [tex]6.022 \times 10^{23}[/tex] molecules of CS₂ is 76 gm/mol.

Let, mass of [tex]1.505 \times 10^{23}[/tex] molecules of carbon disulfide (CS₂) is x.

So,

[tex]x= 76\times \dfrac{1.505 \times 10^{23}}{6.022\times 10^{23}}\\\\x = 76 \times \dfrac{1.505}{6.022}\\\\x = 19 \ gm[/tex]

Therefore, the mass in gram is 19 gm.

What is a way in which nuclear fusion is used?
O Space stations
O atomic bombs
O Nuclear power plants
O In stars

Answers

B. Atomic bombs did this in school

Which best explains the difference between a monomer and a polymer?
A monomer is larger than a polymer.
A monomer contains carbon and a polymer does not.
A polymer contains carbon and a monomer does not.
A polymer is larger than a monomer.

Answers

The difference between the monomer and a polymer should be that monomer should be larger than a polymer.

Difference of monomer and a polymer?

The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.

Also, it represent the building blocks of polymers that contain more complex type of molecules

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Answer:

A

Explanation:

atoms are so small that approximately _______ of them can fit at the end of a needle?

Answers

Answer:

5 million million atoms can fit at the end of a needle

Answer:

Let's just say 5 million million hydrogen atoms could fit at the end of a needle.

Explanation:

Atoms are 100 picometers, and to compare, the amount of even 1 centimeter, a calculator can't even figure out how many picometers are in a centimeter because there is just too much picometers.

Which of the following elements is the least reactive metal? Sodium, Rubidium, Chlorine, and Magnesium.​

Answers

First off chlorine is not a metal so you can ignore that one.

Sodium and Rubidium are in group 1 of the periodic table and Magnesium is in group 2.

Group one metals are more reactive than group two because it is harder for the group two metals to lose their 2 valence (outer most) electrons.

As you go down group 1 there is an increase in the reactivity this is because as you go down there is an increase in the atomic radius which leads to more shielding. This weakens the electrostatic forces of attraction making it easier to lose the outermost electrons, therefore they are more reactive.

Answer:

Magnesium

Explanation:

<3

If the statement is true, select True. If it is false, select False.

The forces between molecules are much stronger than the forces between ions.

True
False

Answers

The forces between molecules are much stronger than the forces between ions.

➜ True

The actual relative strengths will vary depending on the molecules involved. Ionic bonding and covalent bonding will always be stronger than intermolecular forces in any given substance.

1. All ___matter______ is made of atoms that cannot be ______________________ or ____________________. 2. All _______________ of a given __________________ are ___________________ in mass and __________________.

Answers

Answer:

All the matter that is made of atoms that cannot be broken or beaten into thin sheet .2All matters of a given book are in mass and mixture

What is atomic mass made of?

Answers

Answer:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

Explanation:

Which of the following is an example of a decomposition reaction?

Answers

Answer:

B is a decomposition reaction

The chemical equation which represents decomposition reaction is 2 NaCl[tex]\rightarrow[/tex] 2 Na + Cl₂.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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