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what is the diff between atoms and molecule?
50 names of compounds and their chemical formula
how many moles are present in 9g of water
Define mole concept?
What is the difference between O2 and 2O?
what are the limitations of dalton's atomic theory?
Calculate the molecular mass of potassium permanganate (KMnO4). Atomic masses: K=39.0u,
gve list of monovalent cations/anions
diavalent cations /anions
Calculate the number of molecules of phosphorus [P4] present in 31 gram of phosphorus.
calculate the mass of 1 molecule of of oxygen gas : given [at mass of o = 16u,NA =6.022 * 1023 mol -1]
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
how can we find the valency of polyatomic ions like SO4, SO3, CO3,PO4 etc.?
1. how many individual atoms are there in each of the following ? (a) 32 moles of sulphur (b) 32g of sulphur (c) 32u of sulphur (S = 32) 2. how many moles are there in each of the following ? (a) 280g of silicon (b) 12.044 x 10^25 atoms of phosphorus (c) 19.0 atoms of fluorine 3. One mole of zinc atoms weigh 65g. calculate the weight of one atom of zinc.
how to calculate the valency of any compound?
calculate the molar mass of nitric acid HNO3 (H=1,N=14,O=16)
1) calculate the number of molecules in 50g of calcium carbonate
2) calculate the number of moles for the following.
a.64g of oxygen atom
b.24*10 powered by 23 number of oxygen atom
3)calculate the formula unitmass of
a) calcium chloride b) sodium sulphite c) ammonium carbonate
4) calculate the no. of moles sulphur (Sg) present in 16g of solid sulphur
5) write the chemical formula using criss cross method
a)ammonium sulphate b)sodium sulphate c) barium nitrate
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
How many atoms of oxygen are present in 50 g of calcium carbonate?
give me a list of atomicity of all elements
How many times heavier is one atom of carbon than one atom of oxygen?
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
The formula of compounds formed by following ions.
Cr3+ and SO4 2-
Pb2+ and NO31-
prove the formula K.E.=1/2mv2
calculate the molar mass of CO2, H2SO4, NaCl?
1 g of silicon contains ' n' atoms. how many atoms are there in 0.8 g of calcium?
what is meant by tetra atomic and poly atomic?
I want all elements' symbols with their valencies and atomicity.
Calculate the number of moles in 52 g of helium gas ?
CALCULATE THE MASS OF NITROGEN WHICH CONTAINS SAME NUMBER OF MOLECULES AS ARE PRESENT IN 4.4GM OF CO2?
what are polyatomic ions?give examples
calculate the mass of 0.5 mole of sugar (c12h22o11)
what is the difference between nitrate,nitride,nitrite?
what were the drawbacks of Daltons atomic theory?
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
if one mole of carbon atoms weighs 12g what is the mass of 1 atom of carbon?? plss explain....
why atomic mass of some element are in fraction
what is the atomicity of phosphorous?and valency?
explain dalton's atomic theory and write its drawbacks
Is there any trick to learn Valency?
State the nature of the constituent of canal rays?
How to solve numericals based on the mole concept?
What do the following abbreviations stand for
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?
in HNO3 the valency of hydrogen is 1 and valency of NO3 is 2 then why it is written HNO3 in place of H2NO3
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
Calculate the mass of 6.022 x 1023 number of N2 molecules.
give 2 examples of polyatomic elements
difference between molecular mass formula unit mass.
DEFINE MOLE CONCEPT & ITS FORMULAS?
Convert 10g of oxygen gas into no. of moles.
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
Calculate the number of molecules of phosphorous (p4) present in 248g of solid phosphorous. ( given atomic mass of phosphorous=31.0u No=6.022x1023 per mole )
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
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.
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
What is the difference between 2N and N2 ?
what are alkalis give 2 examples
what is the differences between 2H and H2 ?
Calculate the mass of one atom of sodium.
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