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what is the diff between atoms and molecule?
How many particles of calcium are present in 222g of CaCl2 ?
50 names of compounds and their chemical formula
Define mole concept?
WHEN COPPER CARBONATE REACTS WITH HYDROCHLORIC ACID, ACCORDING TO ME THE PRODUCTS WILL BE COPPER CHLORIDE AND HYDROGEN CARBONATE.
BUT IT THE TEXTBOOKK ITS WRITTEN THAT THE PRODUCTS OF THIS REACTION IS COPPER CHLORIDE, CARBON DIOXIDE AND WATER. HOW IS THIS POSSIBLE
what are the limitations of dalton's atomic theory?
the reciprocal of ____________ is called avogram
gve list of monovalent cations/anions
diavalent cations /anions
which has he maximum volume of S.T.P and why?
(a) 1.5 * 1023 molecules of CO2
(b) 1g of H2
(c) 4g of O2
(d) 16 g SO3
calculate the mass of 1 molecule of of oxygen gas : given [at mass of o = 16u,NA =6.022 * 1023 mol -1]
calculate the no. of atoms in 16u of helium .
Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.
In this question why do we multiply the avagadro number? We are to find number of molecules, so why we take out moles?????????????? plzzzzzz reply
The formula of compounds formed by following ions.
Cr3+ and SO4 2-
Pb2+ and NO31-
how can we find the valency of polyatomic ions like SO4, SO3, CO3,PO4 etc.?
how to calculate the valency of any compound?
Convert 10g of oxygen gas into no. of moles.
calculate the molar mass of nitric acid HNO3 (H=1,N=14,O=16)
Calculate the mass of 1 atom of silver and 1 molecule of carbon dioxide.
one gram of a mixture of potassium and sodium chloride on treatment with excess of silver nitrate gave 2g of AgCl . what was the composition of the two salts in the original mixture.
calculate the no. of aluminium ions present in 0.051g of aluminium oxide
Calculate the molecular mass of potassium permanganate (KMnO4). Atomic masses: K=39.0u,
give me a list of atomicity of all elements
1.31g of zinc on heating gave 1.63g of white zinc oxide . 2.65g of zinc on reduction with hydrogen gave 2.12g of zinc. show that these are in agreement with the law of constant proportion
From 200 mg of CO2 ,1021 molecules are removed.How many moles of CO2 are left ?
a) 0.288 b) 2.88 c) 0.00288 d) 0.0288
what is the valency of nitrite?
prove the formula K.E.=1/2mv2
calculate the molar mass of CO2, H2SO4, NaCl?
Calculate the mass of (a) 0.1 mole of KNO3 (b) 1 x 10 23 (c) 112 cm3 molecule of methane of hydrogen at STP
what is meant by tetra atomic and poly atomic?
I want all elements' symbols with their valencies and atomicity.
how to find the number of nitrogen atoms present in 1.5 moles of nitrogen
Calculate the number of moles in 52 g of helium gas ?
what is the valency of hydride?
what are polyatomic ions?give examples
For hydrogen peroxide H2O2,
why he 2's are not cancelled.
Why it is not just HO?
What is special about it?
what is the difference between nitrate,nitride,nitrite?
what were the drawbacks of Daltons atomic theory?
Calculate the number of molecules of phosphorus [P4] present in 31 gram of phosphorus.
if the isotopic distribution of C-12 and C-14 is 98% and 2% respectively, the number of C-14 atoms in 12 g of carbon is
b)1.032 x 1023
c)3.88 x 1022
d)1.302 x 1022
and pls explain
How many atoms of each element are present in 6.3g of nitric acid (HNO3) ?
What is the difference between O2 and 2O?
if one mole of carbon atoms weighs 12g what is the mass of 1 atom of carbon?? plss explain....
calculate the number of ions number of oxygen atoms, total charge in 3g of (co3)2
why atomic mass of some element are in fraction
calculate the number of moles in 32g of methane.
what is the atomicity of phosphorous?and valency?
explain dalton's atomic theory and write its drawbacks
How to make 5% solution of copper sulphate and sodium carbonate ?
Is there any trick to learn Valency?
How to solve numericals based on the mole concept?
calculate the number of molecules in 1ml of O2 at STP
1) Atoms combine in the ration of small whole numbers to form compounds.
2) The relative number and kinds of atoms are constant in a given compound.
Please explain these 2 laws of Dalton's theory.
A ball is dropped from a height of 10m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back ?
Why is valency of magnesium 2? How can we find the valency of an atom?
calculate the number of moles in 22g of carbondioxide?
How many moles of nitrogen are present in70 g of nitrogen?? explain..
Calculate mass of 3.011 X 10 23no of nitrogen atoms ( atomic mass of N = 14 u)
Q. How many molecules are present in 1 ml of water..? explain
give 2 examples of polyatomic elements
Calculate the number of the constituent atoms in 53 grams of Na2CO3( At. massses of Na= 23u , C=12u, O =16u)
I did the questions something like this-
We know that,
n = mass/ molar mass and n= no. of particles/ 6.022 * 10 to the power 23
where n is the no. of moles
Now, from above two equations, we can say that, mass/molar mass=no. of particles/6.022 * 10 to the power 23
difference between molecular mass formula unit mass.
DEFINE MOLE CONCEPT & ITS FORMULAS?
Is there any difference between molar mass and molecular mass?If yes then how
Convert into mole.
(a) 12 g of oxygen gas
(b) 20 g of water
(c) 22 g of carbon dioxide
Relative density of gold is 19.5.The density of water is 1000kg/m3.what will be the density of gold in S.I unit and in g/cc.
GIVE AN EXAMPLE OF 1] DIATOMIC 2] TRIATOMIC MOLECULE OF COMPOUNDS
Chlorophyll contains 2.68% of magnesium by mass.Calculate the number of magnesium atoms in 3.00 g of chlorophyll
a) 1.98 * 1021 atoms b) 6.023 * 1023 atoms c) 1.7 * 1020 atoms d) 2.8 * 1022 atoms
How many number of moles in co2 contain 8.0g of oxygen?
What is the difference between 2N and N2 ?
what are alkalis give 2 examples
what is the differences between 2H and H2 ?
Why are Dalton's symbols not used in Chemistry
Calculate the mass of one atom of sodium.
HOW MANY MOLES ARE THERE IN 5G OF SODIUM HYDROXIDE
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