Does solubility have any unit​

Answer:  Hydrogen that is not used in balloons because hydrogen burns very easily.

pls mark brainliest

Answer:

Helium

He

atomic number 2.

It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas,

Explanation:

These different types of helium atoms have different masses (3 or 4 atomic mass units ), and they are called isotopes. For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom. All elements exist as a collection of isotopes. The word ‘isotope’ comes from the Greek ‘isos’ (meaning ‘same’) and ‘topes’ (meaning ‘place’) because the elements can occupy the same place on the periodic table while being different in subatomic construction.

The average vibrational energy of nitrogen gas (N₂) at 22 c be greater than the average vibrational energy of NaCl at 22 c.

The average distance between molecules of gaseous substance is greater than the average distance between molecules of liquid and solid substance.

The molecules of the gaseous substances always move with greater speed due to large distance between the molecules.

The molecules of a solid substance are closely packed together and this reduces the average speed of the molecules.

Nitrogen gas (N₂) is a gaseous substance while sodium chloride (NaCl) is a solid substance.

Thus, we can conclude that the average vibrational energy of nitrogen gas (N₂) at 22 c be greater than the average vibrational energy of NaCl at 22 c.

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Answer:

It is a metal

Explanation:

One of the properties of metals is that metals are malleable. What we mean by malleability is that the metal can be hammered into sheets that can be used for different applications.

Also, metals can react with chlorine when heated to yield diverse halides. This is true of most metal elements.

The final temperature :T₂=411.125 K = 138.125 °C

Given

T₁=-20 °C+273 = 253 K

V₁=40 ml

V₂=65 ml

Required

Final temperature

Solution

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

Input the value :

T₂=(V₂.T₁)/V₁

T₂=(65.253)/40

T₂=411.125 K = 138.125 °C

Answer:

Yes.

Explanation:

Electric charge cannot change the elemental composition of a substance.

The application of charge to the aluminium foil does not change the composition of the foil and hence the foil will still be made up of aluminium atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

The sugar water mix is a mixture.

Answer:

Physical change

Explanation:

Because sugar molecules are dispersed within the water but the individual sugar molecules are unchanged

Answer:

hello the options related to your question is missing hence I will give you a general answer as regards to combination of atoms in a chemical reactions

answer :

In a chemical reaction the bonds that are found between the atoms of reactants are broken up and a different/new bonds are formed between the atoms of the various reactants involved in the chemical reaction to produce a new product.   during this process no new atoms are created but new bonds are created  to form a product

Example of such substance where atoms can combine together in a chemical reaction is : Iron sulfide  [ Fe(s) + S(s) → FeS(s) ]

Explanation:

In a chemical reaction the bonds that are found between the atoms of reactants are broken up and a different/new bonds are formed between the atoms of the various reactants involved in the chemical reaction to produce a new product.   during this process no new atoms are created but new bonds are created  

Example of such substance where atoms can combine together in a chemical reaction is : Iron sulfide  [ Fe(s) + S(s) → FeS(s) ]  i.e. combination of Iron atoms and sulfur atoms

Answer:

0.4m/s²

Explanation:

Given parameters:

Mass of student = 50kg

Force  = 20N

Unknown:

Acceleration = ?

Solution:

From Newton's second law of motion,

          Force  = mass x acceleration

   Acceleration  = [tex]\frac{Force }{mass}[/tex]   = [tex]\frac{20}{50}[/tex]    = 0.4m/s²

Answer:

the answer is D

Explanation:

Answer:

A. An identification of the atoms in a molecule

Explanation:

The chemical formula of a compound is a representation which shows all the elements therein and the mole relationship between them expressed as subscripts.

Therefore, a chemical formula allows us to identify atoms that are within a molecule.

A molecule is a covalent compound that has discrete or separate units.

For example;

         HCl represents 1 mole of hydrogen chloride molecules consisting of 1 mole of hydrogen atoms and 1 mole of chlorine atoms.

Answer:

and your probably with that blond girl who always me

doubt she so much older than me she's every thing i'm in insecure about

Explanation:

Answer: and all my friends are tired of hearing how much i miss you but i kinda feel sorry for them cause they'll never know you the way i do , yea today i drove through the suburbs and pictured i was driving home to you.

Explanation:

Explanation:

Metal is a better conductor than wood, so a metal spoon could burn

Paul's hand.  So, Sue is incorrect. The metal being good conductor of heat, heats up faster than wood spoon and thus, could burn Paul's hand.

Answer:

that answer would be A. an expression

Answer:

iron, magnesium, and calcium but low in potassium and sodium.

Answer:

E) 1.56x10⁴g

Explanation:

Pounds and grams are both units of mass. Pounds are used in UK and USA. Grams is the unit of mass used in the international system of units, SI.

To convert pounds, lb, to grams, g, we need the equivalence between these 2 units of mass:

1lb = 453.6g

That means 1lb weighs 453.6g. 34.4lb weigh:

34.4lb * (453.6g / 1lb) = 1.56x10⁴g. That means right option is:

Answer:

991.997

Explanation:

Answer:

Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

Explanation:

Answer:

Ga2O3 + 6Li ------> 3Li2O + 2Ga

Answer:

1 Ga2O3 + 6Li——-> 3 Li2O + 2 Ga

Explanation:

Answer:

what's the question man

Explanation:

Answer: 64

Explanation:

Answer:

64

Explanation: add 6 to 58 and you get 64.

Answer:

210 m in 3 sec

Explanation:

The speed of the Cheetah is given to be 70m/s .

   We know that:

         Speed  = [tex]\frac{distance }{time}[/tex]  

Now we find the choice that gives 70m/s:

480 m in 6 sec

          Speed  = [tex]\frac{480}{6}[/tex]   = 80m/s

600 m in 10 sec

           Speed  = [tex]\frac{600}{10}[/tex]   = 60m/s

210 m in 3 sec

            Speed  = [tex]\frac{210}{3}[/tex]   = 70m/s

300 m in 5 sec

          Speed  = [tex]\frac{300}{5}[/tex]    = 60m/s

So the solution is 210 m in 3 sec

0.9 mol KMnO

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

100 g KMnO

Step 2: Identify Conversions

Molar Mass of K - 39.10 g/mol

Molar Mass of Mn - 54.94 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of KMnO - 39.10 + 54.94 + 16.00 = 110.04 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 1 sig fig.

0.90876 mol KMnO ≈ 0.9 mol KMnO

Answer:

3

Explanation:

jdidsolslwoekdldloeo we

Answer:

1.25mol

Explanation:

moles(n)=mass/Mr

Mr of H2O=(1*2)+16

                 =18

n=22.5/18

 =1.25 mol

1.25 mol

The equation for the calculation of mass is as follows:-

[tex]moles(n)=mass(g)/molar mass(g/mol)[/tex]......(1)

Given:-

Mass of water =22.5 g

Molar mass of water=18 g/mol

Subsitute both the values in the equation (1) as follows:-

[tex]n=22.5\ g/18\ g/mol\\=1.25 mol[/tex]

Hence, the value in moles is 1.25 mol.

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Answer:

See explanation

Explanation:

Substances are composed of atoms. The combination of atoms in a substance determines the properties that the substance exhibits.

For instance, if atoms of metals and nonmetals combine, they give rise to ionic substance which are mostly solid and have high melting and boiling points.

On the other hand, atoms of nonmetals combine with each other to form covalent substances having low melting and boiling points and high vapour pressure sometimes.

Similarly, the kind of molecules present in a substance also determine the nature of the substance. For instance, the high boiling point of water is attributed to the polarity of the O-H bond. This explains why it has a much higher boiling point than CH4 of  comparable molar mass but is a non-polar molecule.

Answer:

Use A Nuclear Condenser Add It With A Nuclear Transfer Pipe Conecting With a Tessoract And There You Go!

Explanation:

Answer: atomic mass

Explanation:

Mass Number. The mass number (A) of an atom is the total number of protons and neutrons in its nucleus. The mass of the atom is a unit called the atomic mass unit (amu).