a) If two samples of different elements contain the same number of atoms, they c

Question

a) If two samples of different elements contain the same number of atoms, they contain the same number of moles. b) If two samples of different elements have the same mass, they contain the same number of moles. c) If two samples of different elements have the same mass, they contain the same number of atoms. d) If two samples of different elements have the same moles, they contain the same weight. Without doing any calculations, determine which sample contains the most atoms. a) one gram of cobalt b) one gram of carbon c) one gram of lead d) one gram of copper If we wanted the formula mass of a compound in amu to equal the molar mass of the compound in kilograms rather than in grams. a) the size of the mole would have to be larger than Avogadro's number. b) the size of the mole would have to be smaller than Avogadro's number. c) the size of the mole would not be affected. d) the Avogadro's number is the same regardless of weight units. Without doing any detailed calculations, determine which sample contains the most fluorine atoms. a) 25g of HF b) 1.5 mol of CH_ F

Explanation / Answer

2.The atomic numbers of Co,C,Pb &Cu are 27,6,82&29 respectively

Given that all are having same mass so the element having least atomic number have greater number of atoms.

Among the given C is having least atomic number so it has more number of atoms.

Therefore option (b) is correct.

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