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The mass of one mole of electron is
Atomicity is determined by number of ______present in a molecule
Heavy water contains isotope of Hydrogen
_________conducts nerve impulse in brain
The breakdown of molecular ions from natural products give important information about
An atom is composed of electrons, protons, neutrons and
In stoichiometry, we follow law of ___________ while doing calculations.
Total number of neutron in 5g of D 2O ( D is H)
The relative abundance of isotopes of elements is measured by
Calculate mass in grams of 8.694 moles of Ag 2CO 3
A mole of a substance contains ______particles
In the gaseous state, the distance between the molecules is _________ times _____ than their diameters.
A sample so .7 mol of metal M reacts completely with excess of fluorine to form 45 g of MF 2, how many moles of F are present in it.
In Al 2S 3, the valency of Al is
2 moles of octane (C 8H 18) burn with 25 moles of oxygen (O 2) and produced _____moles of carbon dioxide along with 18 moles of water
If number of molecules of different gases are same at S.T.P, the occupied volume will be
Formula mass is considered for ___compounds instead of their molecular mass
During combustion analysis MgClO 4 is used to absorb ______________
A full stop may have_______ atoms present in it
Glucose(C 6H 12O 6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample:
What is the empirical formula for the following molecular formula C 5H 12
The _study of composition of pure substance in 17th century clearly shows that few elements are components of many substances
The negative ions having group of atoms is/are
The atoms of hemoglobin is heavier than H-atoms
The peaks forms in a mass spectrograph shows number of __________ of an element
The unit used to express the relative atomic mass is called
If 9.8 g of sulfuric acid dissolved in excess quantity of water, it will yield _______moles of hydrogen ion ( H + ) and _____mole of sulphate ions (SO 4 2- )
Dalton's atomic theory couldn't explain the concept about:
The smallest number of molecules are present in:
Limiting reactant controls the amount of:
27 g of Al will react with how much mass of O 2 to produce Al 2O 3
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