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ANSWER:

which QUESTION ............

Answer:

A chemical equation is the symbolic REPRESENTATION of a chemical REACTION in the form of symbols and formulae, wherein the reactant ENTITIES are given on the left-hand side and the product entities on the right-hand side. ... The firstchemical equation was diagrammed by JEAN Beguin in 1615.

ANSWER:

Cu+2H2SO4----->CuSO4+2H2O+SO2

ANSWER: SOLID. ALSO it has definite voluma

Explanation:

hello mate

here is your answer

______________

1 mole of any substance = Avogadro number of molecules (6.023×10^23)

1 mole of oxygen = MOLECULAR weight = 2 × ATOMIC weight (as oxygen is DIATOMIC)

1 mole of oxygen = 2×16=32 gramme

So,

If 32 g = avagadro number of molecules

8 g = avagadro number ×8/32

No. Of molecules = avagadro number /4.

number of molecules = given mass/molecular mass x avagadro’s constant

(molecular mass of oxygen = 16)

=8/16 x 6.022 x 10^23

=6.022 x 10^23/2

= 3.011 x 10^23

hope it helps you mate

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ANSWER:

for CALCULATION of ENERGY of ELECTRON is

ANSWER:

YES SOMETIME it ATTRACT each other .

Answer:

3 MOLE of hcl will be REQUIRED BUFFER SOLUTION containing

ANSWER:

Phosphoric acid – Manufacturing process for Phosphoric acid : ... In a wet process facility (see FIGURE 1), phosphoric acid is produced by reacting sulfuric acid (H2SO4) with naturally occurring phosphate rock. The reaction also FORMS calcium sulfate (CaSO4), commonly referred to as gypsum.

ANSWER:

SP2 carbon SE directly ATTACH carbon alpha carbon kehlatein Hain and us carbon se directly attach HYDROGEN alpha hydrogen kehlate Hain..

ANSWER:

Simply memorize the atomic no and no of ELECTRONS

ELECTRONIC configuration is represented in atom no with the help of shell rule , that you MUST know .

For mass , simply ADD atomic no + electrons as atomic no is the no of electrons .

ANSWER:

VOLTMETER and SALTBRIDGE

Some COMMON INDICATORS are:

• Methyl Orange
• Phenolphthalein
• Litmus
• Red Cabbage Extract
• Turmeric
• Hibiscus Extract

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No it is a PHYSICS PROJECT.

ANSWER:

PURE copper with blisterd SURFACE FORMED during smelting

ANSWER:

yesss......................

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HI there ,

By the ROLE

pH = - log [H+] = -log [ H3O+]

As example

Hydrogen ion concentration is 1×10^-2 , so

pH = - log [ 1×10^-2]

pH = 2

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ANSWER:

B) PEROXIDE.........................

Answer:

COAL

Explanation:

due to rich amount of coal they are able to produce LARGE no. of ENERGY

Answer:

Explanation:

Solution= SOLVENT+Solute

                105+20=125 gram

Concentration of solution =  

Mass of solute / (Mass of solute + Mass of solvent) X 100

               20x100/(125)

           =2000/125 =16%

EXPLANATION:

HOPE its HELP U ❤..................

Hi there ,

《 E 》Electrode potential is the electromotive force between TWO electrodes , its calculated by forming a galvanic cell between ELEMENT electrode with hydrogen electrode

● The emf =

E cell = E cathode - E ANODE

☆ As example

If u know E cu is +0.34 v = cathode

E ZN is - 0.76 v = anode

So, Ecell = 0.34 -(-0.76) = 1.1 v

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Explanation:

1.AgNO3 + NaCl____________ AGCL + NaNO3

2.N2+3H2____________2NH3

3. 2CO+O2____________2CO2

4. 2H2+O2_________2H2O

5. 2Mg+O2_________2MgO

6.4Fe+3O2__________2Fe2O3

7.P4+5O2____________P4O10

Hi there,

The answer is C= PH3

The oxidation STATE for compounds

O= -2

Na = +1

H= +1

A) P4O6

P= 2×6 ÷4 = +3

B) NaH2PO2

P= 2×2 - 3 = +1

C) PH3

P = -3

D) Na3PO4

P= 2×4 - 3 = +5

The minimum is 《C》

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ANSWER:

because they CONTAIN SHAPE of JAR in which they PLACED

Explanation:

In simple IONS, the oxidation number of the ATOM is the charge on the ion. For example, NA+, K+, and H+ all have oxidation NUMBERS of +1. O2- and S2- have oxidation numbers of -2. In a molecule or compound, the oxidation number is the sum of the oxidation numbers of its constituent atoms.

it means that MATTER is made up of smaller PARTICLES that can't be observe with our NAKED eyes.

HOPE THIS HELP!

Explanation:

The GENERAL equation for a metal reacting with an acid is.

metal + acid → salt + hydrogen

Hydrogen is a colourless, odourless gas. So you may wish to confirm that the gas PRODUCED is indeed hydrogen.

In order to do this, run your EXPERIMENT in a test tube. (E.g fill a SMALL amount of acid, place some metal in, e.g magnesium) and place a bung inside the test tube to TRAP the gas.

Then, introduce a burning splint to the test tube. If a “Squeaky pop” occurs then you have confirmed that hydrogen is produced.

ANSWER:

suiaakak7stjkOianaj5q718wjnzs

ANSWER:

OPTION (3) is the answer

ANSWER:

yesss..................

ANSWER:

GIVEN mass /molar mass =no. Of moles

Put this formula in all of the options and CHECK the no. Of moles

Therefore ans is (c)

ANSWER:

Explosion of a firework involves conversion of the flammable substance inside the THING to some other substances like ASH and SMOKE and also the reaction is irreversible as we cannot get the fireworks back after explosion therefore it's a chemical change

ANSWER:

Explanation:Iron pipes are coated with zinc so as to reduce the rusting of iron which causes damage to pipes . This PROCESS of applying a COATING of zinc on iron to PREVENT rusting is called galvanization

Answer:

0.25

Explanation:

1 GRAM ATOM MEANS one mole of the substance has 8 gram of sulphur contains 0.25 gram atom of sulphur

HF ... HYDROFLUORIC ACID!

Answer:

⬇️ ⬇️ ⬇️

The FORMULA of magnesium HYDROXIDE is MG(OH)2.

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the OXIDATION state of NI in K [Ni(CN)] is 2

in both cases STEAM is formed with HEATING...... hope will HELP you !!!!! please MARK as BRAINLIEST and follow me....

ANSWER:Particles of matter are never at REST and KEEP moving continuously in these free SPACES. The particles of matter move continuously and their speed increases with an increase in TEMPERATURE. The particles of matter attract each other. However, this force of attraction varies from matter to matter.

Answer:

acid+ METAL = salt + HYDROGEN gas

H2 burns with a pop SOUND when matchstick is BROUGHT NEAR its mouth

base + metal sometimes follow this

eg

HCl+NaOH=NaCl+H2O

Answer:

Metals ACT as a reducing AGENT because they have tendency to DONATE electrons and get OXIDIZED. so MOSTLY metal are found +ve in nature

Answer: CuO is the Oxidizing AGENT because it's oxidation no is decreasing from +2 to 0,so it UNDERGOES reduction and the species which undergoes reduction is an oxidising agent

EXPLANATION:

ANSWER:

sorry I can't do this questions because I am not study in this CLASS

ANSWER:

OZONE LAYER is the CORRECT answer

Explanation:

C)Ozone layer

ANSWER:

if no. of particle is given,then we have to DEVIDE it with AVOGADRO's no to GET the no. of moles

ANSWER:

MAGNISIUM is GETTING oxidised and CONVERTED into magnesium oxide