Explore topic-wise InterviewSolutions in Current Affairs.

ANSWER:

I’ll assume this is for oxygen gas, which is O2, rather than elemental oxygen, which is O.

First, we need to KNOW how many moles of O2 are in 2 grams. O2 has a molar mass of 32, meaning 1 mole of O2 has a mass of 32g. Thus, 2g of O2 has 0.0625 moles of O2,

BUT WHAT THE HELL IS A MOLE? A mole is a unit in chemistry, essentially meaning that it is the unit number times by Avogadro’s number. (NA= 6.022*10^23) Why is this IMPORTANT? Because funny enough, one gram of elemental hydrogen (H) has 6.022*10^23 atoms of H in it. This allows us to scale the number of atoms in a substance to a level that can be practically dealt with!

Now, back to the question. We know that 2g of O2 has 0.0625 moles of O2. That means that the number of O2 molecules present in 2g of O2 is equal to 0.0625*NA. That’s 3.76375*10^22. That is a lot of molecules. And we have not even reached the atomic level!

An O2 molecule has obivously 2 O atoms in it. SINCE we can only find out the number of electrons from the number of atoms present, we need to calculate how many moles of O are in 2g of O2. What we find is that the number of O atoms is double the number of O2 molecules, since there are 2 O atoms in 1 O2 molecule. That makes our equation 0.0625*2*NA. That’s 7.5275*10^22. Still an astronomically large number.

Now, electrons. For this, we need to recall from the periodic table that oxygen has the atomic number of 8. This means there are 8 protons in an oxygen ATOM. In a neutrally charged atom, the amount of electrons is equal to the amount of protons. Hence, the amount of electrons in 1 O atom is 8. Since we know that each atom has 8 electrons, we can just add that to our equation. Our final equation becomes:

0.0625 (moles) * 2 (amount of atoms in molecule) * 8 (amount of electrons in atom) * 6.022*10^23 (NA)

This gives us something unusual. The answer is 6.022*10^23, or as we know now, Avogadro’s number. This just means that in 2g of O2, there is 1 mole of electrons.

Explanation:

mark me brainliest

Explanation:

YES they harm the plant if they are USED in EXCESS amount.

they can be used in less amount in ORDER to KILL the insects and pests alone.

ANSWER:

1. MAGNESIUM COBALT REACTS WITH HYDROCHLORIC ACID TO FORM THE PRODUCTS MAGNESIUM CHLORIDE ,WATER AND CARBON DIOXIDE

Answer:8.4×10^23

Explanation:

It is so because its SHAPE and VOLUME REMAINS same

Explanation:

very EASY :-

GAS < LIQUIDS < Solids

ANSWER:

Al2(SO4)3

Explanation:

aluminum valency is 3 and sulphate valency is 2

Answer:

which reaction.......

its not clear...

PLS TELL i can HELP u in this...

ANSWER:

hydrogen and HELIUM are PRESENT in group 1

ANSWER:

STEAM FRIEND !!!

EXPLANATION:

What is the role of PH in the body for oxygen transport

Results in English

व्हाट इस थे रोले ऑफ़ पह इन थे बॉडी फॉर ऑक्सीजन ट्रांसपोर्ट

हिन्दी में नतीजे

Search Results

Featured snippet from the web

Oxygen Transport. As blood nears the lungs, the carbon dioxide concentration decreases, CAUSING an increase in pH. This increase in pH INCREASES hemoglobin's affinity for oxygen through the Bohr effect, causing hemoglobin to PICK up oxygen entering your blood from your lungs so it can transport it to your tissues.

Mark it as brainelist

Answer:

Dalton's atomic theory proposed that all MATTER was composed of atoms, indivisible and INDESTRUCTIBLE BUILDING blocks. ...

Dalton's atomic theory also stated that all compounds were composed of combinations of these atoms in DEFINED ratios.

Take some ammonium chloride and POWDER it. Keep the powder in a CHINA dish. Now cover the china dish with an inverted funnel as shown in the illustrated figure. Then close the end of the funnel with a piece of cotton. Now place the dish on a wire mesh kept on a TRIPOD stand to heat it by a burner. You will notice that the FUMES (i.e., vapours) of ammonium chloride are seen in the funnel above the dish. Thus, ammonium chloride on heating, changes directly from SOLID to gaseous form which shows the sublimation of AMMONIUM CHLORIDE.

ANSWER:

ENDOTHERMIC..................

3 is the CORRECT ANSWER ACCORDING to me

hope it's RIGHT

ANSWER:

CH4---16

16g ----1 MOLE

48G----3moles

3moles answer

Explanation:

no HTML5 and CSS3 you will be ABLE to get the latest updates to the use copy distribute the only way we COOK a meal for a d I have to this email and any attachments is jddjvu is your ANSWER my DOOD

ANSWER:

I WANT to KNOW about PROPERTIES of COOL

In chemistry, bases are substances that, in aqueous solution, RELEASE hydroxide (OH−) IONS, are slippery to the touch, can taste bitter if an ALKALI, change the color of indicators (e.g., turn red litmus paper blue), REACT with acids to form salts, promote certain chemical reactions (basecatalysis), accept protons ...

Ammonia, NH3 (fertiliser, cleaning agent)

SODIUM hydroxide, NaOH (cleaning agent, paper, pH regulator)

Sodium carbonate, NaCO3 (paper, glass, detergent, toothpaste)

Sodium bicarbonate, NaHCO3 (baking soda, fire extinguisher, toothpaste)

Hope this helped you Please Mark this answer as brainlist

Answer:

Covalent compounds are formed when two non metal ELEMENTS JOIN each other. Example- carbon tetra chloride (ccl4),methane (ch4),water molecule (h2o), hydrochloric acid (hcl).

Properties:

they have LOW melting and boiling point

they don't conduct electricity

these compounds exist in gas,liquids and soft solids

these compounds have bad CONDUCTOR of electricity

these compounds undergoes ionization

Rancidity is a very general term and in its most general meaning, it refers to the spoilage of a food in such a way that it becomes UNDESIRABLE (and usually unsafe) for consumption. When people SAY that a food has "gone bad," what they're usually talking about is rancidity.

For Example, Potato Chips when kept in air for a long time gives unpleasant smell and bad taste. Rancidity can be retarded by storing food in air-tight CONTAINERS.

Rancidity can be prevented USING the following methods:

• Adding antioxidants (substances which prevent oxidation) to food.

• Storing food in AIRTIGHT containers to slow the process of rancidification.

• Refrigerating food also helps to slow down rancidification.

• Replacing oxygen in the containers with another gas.

On vaporization of LIQUID ammonia it ABSORBS large quantity of heat WITHOUT changing its TEMPERATURE. This is the reason why ammonia is used for making ice in the factories as it acts as a REFRIGERANT.

Answer:

A hematinic is a nutrient required for the formation of BLOOD cells in the process of hematopoiesis.

The main hematinics are iron, B12, and folate. DEFICIENCY in hematinics can LEAD to anaemia.

Answer:

alpha PARTICLES (that we LEARN in CHEMISTRY) are doubly ionised Helium particles.

hope you MARK it brainliest!

thank you!

1.heat increasing the motion of particles by increasing TEMPERATURE .2.heat energy transfers the high temperature matter to low temperature matter.3.heat helps the solid to melt by PROVIDING energy in BREAKING STRONG intermolecular forces present between solids.4.heat helps in changing the state of mater from one state to ANOTHER.

ANSWER:

An ALPHA praticles CONSIST of two praton and two NEUTRONS. A beta particiles is an ELECTRON that is emitted from the nucleus of an atom. A beta particiles is formed by breakdown of a neutrons into a proten and an electron and antineutrin.

ANSWER:

EXPLANATION:

I don’t KNOW the answer

ANSWER:

WHATS did you MEAN by your QUESTION

of WIND

as it is DIRECTLY PROPORTIONAL FACTOR

Explanation:

n factor refers to no. of H+ ions replaced by 1 mole of ACID in a REACTION .

By dividing the CHART into THREE columns

Types of Definitions Equations

chemical

equation

_________________________________________

In types of reaction you have to WRITE the following:

1) Combination Reaction

2) Decomposition Reaction

(i) Thermal decomposition

(ii) Electrolysis

(iii) Photochemical

3) Displacement Reaction

4) Double - Displacement Reaction

5) Neutralisation Reaction

6) Oxidation Reaction &

7) Reduction Reaction

In 1st column you have to mention the names of all these reactions.

Now DEFINE all these reactions in the 2nd column.

After that mention one equation of each of the reaction in the 3rd column.

ANSWER:

☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺

Answer:

When you mix LIME water and carbon dioxide, a whit PRECIPITATE- calcium carbonate is FORMED which turns the solution MILKY in color.

P.s. Please mark this as the brainliest answer.  Thank you :)

ANSWER:

Hydrolation

EXPLANATION:

N+N ____N2 NITROGEN

Cl+Cl_____Cl2 CLORINE

garmi SE BACO VO HI bhut hai sahi na MARK it

Answer:

The hidden HEAT which change the states of a MATTER without any changing of temperature..

EXAMPLE of latent heat is when we heat the water to boil their temperature is 100 degree celcius and then when it's remain one drop of EVAPORATION it's temperature is constant at 100 degree celcius...

Hope it helps..

Answer:

FARADAY's First Law of Electrolysis. The MASS of the substance (m) deposited or liberated at any electrode is directly PROPORTIONAL to the quantity of electricity or charge (Q) passed.

ANSWER:

Explanation:

No.of Moles=Given Mass / MOLAR Mass.

Given Mass =4.25 G =17/4.

gMolar Mass of NH3 = 17g.

So No.of Moles =17/4 ÷ 17= ¼.

Therefore, No.of atoms=No.of Moles×6.022×10^23×Atomicity.

Atomicity of NH3 is 4i.e. No.of atoms=¼ × 6.022×10^23 × 4 = 6.022×10^23.....

Hence, the CORRECT option is 4....

ANSWER:

B or C MAY be are one of the answer

I hope it helps you

Answer:

I dont UNDERSTAND hmmmmm WRITE question again and PROPERLY

ANSWER:

because SALT is NATURALLY NEUTRAL

Answer:

Answer:-

Molar mass of CO

2

= 44g

Given mass = 200 mg = 0.2g

Number of MOLES =

44

0.2

=

220

1

Number of moles=

Avogadro’s number

number of MOLECULES

⇒Number of molecules=Avogadro’s number×number of moles

⇒No. of molecules=6.022×10

23

×

220

1

=2.73×10

21

Molecules in

220

1

moles

As 10

21

molecules are removed,

∴ No. of molecules left = 2.73×10

21

−10

21

=1.73×10

21

∴ No. of moles=

Avogadro’s number

No. of molecules

=

6.23×10

23

1.73×10

21

=2.88×10

−3

ANSWER:

Explanation:

1. CA+2H2O-> Ca(OH)2+H2.

2.3Fe+4H2O->Fe3O4+4H2.

3.ZnSO4(on HEATING)-> Zn+SO2+O2.

4.2Mg+O2-> 2MgO.

5.2Na+2H2O-> 2NaOH+H2.

6.2Al+3H2O-> Al2O3+3H2.

1diffusion is ONE of the PROOF of the particle theory of matter.

2the definition of diffusion.

3diffusion in SOLID, liquid and GAS

4factors that AFFECT the rate of diffusion and the related experiments.

hope it helped

Answer:

EXPLANATION:

If we consider Iodized table salt  (the most common type) then no, it's not a pure substance because you can remove the iodine without changing the chemical nature of the substance. Iodized table salt is a mixture, not a pure substance.

While, NaCl with no iodine is a pure substance.

Coz,

Table salt is COMPOSED of sodium and chlorine, NaCl. It's a compound of two distinct elements that cannot be broken down further without changing the properties of the substance. If you were to take one molecule of NaCl and divide it further, you would no LONGER have table salt; you would have a sodium atom and a chlorine atom.

“Sugar” usually refers to refined cane or beet sugar, which is sucrose. There are MANY KINDS of sugars, but this is the most common commercial product.

It’s a pure substance because it consists of one kind of molecule. Refining incluces several processes that remove other things (such as the cellulose) from the beets or cane. Refined sugar has well defined physical and chemical properties that make it very useful in product: well defined solubility, melting point, chemical changes at various temperatures, sweetness, etc.

The fifth STATE of matter is the Bose-Einstein condensate. In 1920, Indian physicist Satyendra Nath Bose had done some CALCULATIONS for the fifth state of matter. Albert Einstein predicted a NEW state of matter — the Bose-Einstein condensate (BEC).

ANSWER:

so SRRY YRR sci ko dekh kar to chakker ANE LGG jaate hai

Explanation:

The maximum number of STEREOISOMERS is 2n , where n is the number of chiral centres. Since n=2 , the maximum number of stereoisomers is 22=4 . STRUCTURES 1 and 2 are two DIFFERENT nonsuperimposable mirror IMAGES of each other. But Structures 3 and 4 are meso compounds.