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what is the diff between atoms and molecule?
Calculate the molecular mass of potassium permanganate (KMnO4). Atomic masses: K=39.0u,
50 names of compounds and their chemical formula
The formula of compounds formed by following ions.
Cr3+ and SO4 2-
Pb2+ and NO31-
Define mole concept?
what are the limitations of dalton's atomic theory?
what is the valency of nitrite?
gve list of monovalent cations/anions
diavalent cations /anions
calculate the mass of 1 molecule of of oxygen gas : given [at mass of o = 16u,NA =6.022 * 1023 mol -1]
how many moles are present in 9g of water
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
Convert 10g of oxygen gas into no. of moles.
how can we find the valency of polyatomic ions like SO4, SO3, CO3,PO4 etc.?
What is the difference between O2 and 2O?
how to calculate the valency of any compound?
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.
calculate the no. of aluminium ions present in 0.051g of aluminium oxide
give me a list of atomicity of all elements
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
calculate the molar mass of CO2, H2SO4, NaCl?
prove the formula K.E.=1/2mv2
what is meant by tetra atomic and poly atomic?
I want all elements' symbols with their valencies and atomicity.
the reciprocal of ____________ is called avogram
Calculate the number of moles in 52 g of helium gas ?
what are polyatomic ions?give examples
what is the difference between nitrate,nitride,nitrite?
what were the drawbacks of Daltons atomic theory?
in HNO3 the valency of hydrogen is 1 and valency of NO3 is 2 then why it is written HNO3 in place of H2NO3
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 will you prove experimentally the law of conservation of mass?
HOW MANY MOLES ARE THERE IN 5G OF SODIUM HYDROXIDE
if one mole of carbon atoms weighs 12g what is the mass of 1 atom of carbon?? plss explain....
Calculate the number of molecules of phosphorus [P4] present in 31 gram of phosphorus.
why atomic mass of some element are in fraction
is calcium carbonate a molecular or ionic compound
what is the atomicity of phosphorous?and valency?
explain dalton's atomic theory and write its drawbacks
does molecule take part in a chemical reaction
Is there any trick to learn Valency?
How to solve numericals based on the mole concept?
If hydrogen combines with oxygen in ratio of 1:8 by mass to form H2O. How many moles of oxygen would be reqired for the given amount of hydrogen gas. [ At. mass of H=1u, O=16u]
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 ?
what are the first 20 elements in the periodic table in order along with thier atomic and mass number?
Why is valency of magnesium 2? How can we find the valency of an atom?
calculate the number of moles in 22g of carbondioxide?
Give some examples of octa atomic ion/
Calculate mass of 3.011 X 10 23no of nitrogen atoms ( atomic mass of N = 14 u)
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
Q. How many molecules are present in 1 ml of water..? explain
give 2 examples of polyatomic elements
difference between molecular mass formula unit mass.
carbon and oxygen combine to form carbon dioxide gas.they do so in the same ratio 3:8 .what mass of oxygen would be required to react completely with 6.0g of carbon? also calculate the mass of carbon dioxide gas so formed. which law of chemical combination will govern our answer?
DEFINE MOLE CONCEPT & ITS FORMULAS?
Is there any difference between molar mass and molecular mass?If yes then how
1. the molecular formula of sulphuric acid is H2SO4: (a) calculate the molecular mass of sulphuric acid. (b) how many moles are there in 9.8g of sulphuric acid ? (c) how many "gram-atoms" of each element are there in 9.8g of sulphuric acid ? (atomic masses: H = 1, S = 32, O = 16) 2. Find the number of molecules present in a drop of chloroform (CHCl3) weighing 0.0239g. (C = 12, Cl = 35.5, H = 1)
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.
What do you mean by atomicity of the molecule of an element?
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 atoms are present in 0.012 kg of C-12 ? What is the name given to this statement ?
What is the difference between 2N and N2 ?
what are alkalis give 2 examples
what is neon?cation or anion
what is the differences between 2H and H2 ?
What do the following abbreviations stand for
Calculate the mass of one atom of sodium.
write the chemicsl formulae and names of the compounds formed between
1}. Barium and nitrate ions 2}. Ferrous and sulphide ions
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