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ANSWER:

LAHORE

Explanation:

as lahore WANTS to be LIVING with PAKISTAN

ANSWER:

CAO + H2O → CA(OH)2 is balanced

ANSWER:

NATURAL WATER is USE for MEDICAL use

B) 1,2 is the ANSWER

BOHR ATOM of model

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...

HNO

Explanation:

100% CORRECT answer

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EXPLANATION:

SALT is water SOLUBLE, while sand is not. This means the two can be MIXED in water and stirred. The salt will dissolve and the sand will not. These differences form the basis for separation of the three materials.

Answer:

-Different crops need different TYPE of soils, different types and amounts of nutrients, and different types and amounts of water. The amount of water REQUIRED by the PLANT is also dependent on the growing season and the climate where it is grown

-What are different types of soil?

There are three different types of soil—sand, silt, and clay. Each type of soil has different characteristics. The major difference is in the size of the particles that make up the soil. The soil types also have DIFFERENCES in color, amount of nutrients, and ability to hold water.

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ANSWER:

htdutkdskutsmhtdmursmhfshrshtshfshmrshrshfznhrsmhrshr

Explanation:

FULL of WORDS RIGHT

ANSWER:

OPTION A

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Explanation:

Rutherford's Model:

• Rutherford's Atomic Model is based on α - ray scattering experiment.

• The existence of Nucleus was DISCOVERED by Ernest Rutherford by the Experiment of α - ray Scattering. Hence this is also called as Nuclear Model.

Postulats:

• Most of the atom is Hallow.

• All the positive charges and MASS of the atom is concentrated at the centre of the Spherical Atom which was known as Nucleus.

• Size of Nucleus is one lakh part of size of an atom.

• The Positive charge of the nucleus is counter balanced by the negatively charged electrons REVOLVING around the nucleus.

• Since, This model is also known as Planetary or Solar Model.

• With the help of Electrostatic Force the Electron and The Nucleus held together.

• For concreteness, consider the passage of a high speed α particle through an atom having a positive central charge N e, and surrounded by a compensating charge of N electrons.

• The atom itself is about 100,000 (105) TIMES the diameter of the nucleus.This could be related to putting a grain of sand in the middle of a football field.
• The atom's electron cloud does not influence alpha particle scattering.

Drawbacks:

• It cannot explain the line SPECTRUM of hydrogen

• It is against to laws of electro dynamics. Hence this model cannot explain the stability of atom.

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Explanation:

Answer:

1) When we exhale we give out a colourless gas. This gas is added to soft drinks to give them a tangy taste. How can this gas be tested in the LAB?  

Answer: When CARBON dioxide, CO2, ENTERS the LIMEWATER, the limewater becomes CLOUDY. When you exhale into the bottle, the limewater will turn cloudy.

2) When we exhale we give out a colourless gas. This gas is added to soft drinks to give them a tangy taste. Give a word equation to show how this gas can be produced?

Answer: H2CO3 → H2O + CO2,

Answer:

1. A mixture of immiscible liquids is separated by using an apparatus called separating funnel

Explanation:

2. Chromatography is a method of separating out materials from a mixture. Ink is a mixture of several dyes and THEREFORE we can SEPARATE those colors from one another using chromatography. When ink is exposed to certain solvents the colors dissolve and can be seperated out. When we expose a piece of paper with ink on it to a SOLVENT, the ink spreads across the paper when the ink dissolves

3 . Since the boiling POINT of NITROGEN and oxygen are very close to each other, hence, fractional distillation is used to separate the components of liquid air.

Facts Stated by Kossel in RELATION to Chemical Bonding

— In the PERIODIC table, the highly electronegative halogens and the highly electro-positive alkali metals are separated by noble gases.

— Formation of an anion and cation by the halogens and alkali metals are formed by gain of electron and LOSS of electron respectively.

— Both the negative and positive ions acquire the noble gas configuration.

— The negative and positive ions are stabilized by electrostatic attraction Example,

• Modes of Chemical Combination

— By the TRANSFER of electrons: The chemical bond which formed by the COMPLETE transfer of one or more electrons from one atom to another is termed as electrovalent bond or ionic bond.

— By sharing of electrons: The bond which is formed by the equal sharing of electrons between one or two atoms is called covalent bond. In these bonds electrons are contributed by both.

— Co-ordinate bond: When the electrons are contributed by one atom and shared by both, the bond is formed and it is known as dative bond or co-ordinate bond.

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It seems that you have forgotten to ATTACH the picture. PLEASE check the same.

ANSWER:

A homogeneous mixture has the same uniform appearance and composition throughout. MANY homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly DIFFERENT substances or phases. The three phases or states of matter are GAS, liquid, and SOLID.

ANSWER :

9.6×10−15m

Solution :

Here, E=8.7MeV=8.7×1.6×10−13J

Z=29,R0=?

r0=2Ze24π∈0(E)

=9×109×2×29(1.6×10−19)28.7×1.6×10−13

r0=9.6×10−15m

Wash and soak black chickpeas in ENOUGH water for upto 8 hrs or overnight. Drain water completely and tie them in a clean damp cotton cloth or PAPER towel ( i USED cheese cloth). Place it in a colander and cover it with the plate, keep it in a WARM place for about 1 or 2 days or until it SPROUTS well.
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ANSWER:

oxygen and CARBON DIOXIDE

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ANSWER:

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EXPLANATION:

1. Weight of cotton for making pillow = 6 1/4 kg ( 25/4)

Weight of cotton to make 1 pillow = 1 1/4 kg( 5/4)

NUMBER of pillows that can be made = 25/4 ÷ 5/4

= 5 pillows

2. Cloth NEEDED to make one shirt = 2 1/3 m(7/3)

Total cloth = 9 1/3 m (28/3)

Number of shirts that can be made = 28/3 ÷ 7/3

Number of shirts that can be made is 4.

3. Distance covered in 1 hr = 3 1/3 I'm

Distance = 10 km

Time taken to cover 10 km = 10 ÷ 3 1/3

= 3 hrs

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ANSWER:

MASS of SOLUTE = 50g

mass of SOLVENT = 350g

mass of solution = 50 + 350 = 400g

mass by mass% = mass of solute / mass of solution

mass by mass = 50/400 * 100

= 100/8

= 12.5%

mass by mass % = 12.5%

Answer:

NaCl (AQ) + AGNO3 (aq) → AGCL (s) + NaNO3 (aq)

EXPLANATION:

INERT GASSES is the the ANSWER

ANSWER:

I have SENT you the answer

ANSWER:

its C

Explanation:

ANSWER:

(NH4)3PMo 12040 this is your answer

Hydrolysis is a process in which saline water has electricity passed through it which HELPS in The BREAKDOWN of water into hydrogen and oxygen

Explanation:

• A. to test for oxygen we must check the GAS is colourless and odourless. Then we should take a burning splinter and place it in the the container which has oxygen in it. The burning splinter will BURST into to FLAMES because oxygen is the supporter of combustion

• B.it is impossible for one of the gas to be carbon dioxide because there is no carbon present in the  water molecule or the  electrolyte

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What do you understand by term hydrolysis and hydration give .

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ANSWER:

FLORINE has 9 neutrons 9 protons and 10 ELECTRONS and MARK me as the brainliest and please follow me please plz I will follow you back

Which element has 20 protons,21 NEUTRONS and 20 ELECTRONS?

CALCIUM

Answer:

if you consider the first 18 elements of the periodic table, the maximum number of electrons FOUND in the L-shell is 8. This is because of the fact that electrons are filled in shells in the increasing order of energy. So, first the shells are filled in the order k, then l, and FINALLY m.

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ANSWER:

SOLID

Explanation:

when we FREEZE something it GOES to a solid state

ANSWER:

MATTERS

INSIDE

Explanation:

OPTION C

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Answer:

Very NICE question ... study hard. crack all EXAMS...

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Answer:

Here is ur answer :

Explanation:

40% H2SO4 means that the 40 ML of H2SO4 is dissolved in water to make the SOLUTION 100 mL. Then we can CALCULATE the mass of H2SO4. Answer: The concentration of the solution in % (m/v) is 52%

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ANSWER:

SUNLIGHT............

ANSWER:

INSULATION from COLD ENVIRONMENT

Answer:

option c is correct

Explanation:

we know that pressure of water INCREASES with DEPTH. so in DOWNWARD PART of dam if its thickness is less then it will not last longer, (which may cause dam to break off)

hence the downward part is made thicker and UPWARD part is made thinner(pressure of water is less)

Answer:

OPTION number B

Explanation:

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Answer:

C. The battery is weak.

Explanation:

Option A and B are wrong; if the bulb was fused or the wires are not touching the bulb properly, the bulb would not have even worked.

Option D is incorrect, SINCE the bulb would have PRACTICALLY worked anyways and again, if it did affect the working of the bulb, the bulb would not have glowed.

Based on the above observations, option C is CORRECT. The bulb is glowing at least dimly and that proves that there is enough energy to SET off the bulb in the cell.

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Answer:

GLASS ROD is the odd MAN out

Explanation:

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ANSWER:

COPPER; CONCRETE; glass

Explanation:

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I don't UNDERSTAND you!

EXPLANATION: Phosphorus

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EXPLANATION:

false

as only OBSERVATIONS can DECIDE INFERENCE

ANSWER:

WAX is a BAD CONDUCTOR of ELECTRICITY

ANSWER:

FALSE. .......

EXPLANATION:

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