Honors Chemistry: Chapter 2| QUESTIONS WITH COMPLETE SOLUTIONS 100% VERIFIED|
LATEST UPDATE GRADED A+
To calculate molecular mass and formula mass, you________ the atomic mass of each element
in the chemical formula by the_______ for that element then______ the products. multiply;
subscripts; add
Find the molecular mass of sugar. (C6H12O6) 180.10 amu
Calculate the average atomic mass of Ne's three isotopes.
Ne-20: 90.4838%; 19.9924 amu
Ne-21: .02696%; 20.9940 amu
Me-22: 9.2465%; 21.9914 amu 20.1799 amu
1 amu essentially has the same mass of 1__________. proton
To deal with large numbers in chemistry, we need a unit that can relate macroscopic quantities-
__________- to particles. microscopic quantities
mole (mol) amount of a substance that contains Avogardo's number of particles
Avogardo's number (Na) -The # of atoms in exactly 12 g of carbon-12 and it is the number of
particles in one mol of a substance
What is Avogadro's number? 6.022 x 10^23 atoms
molar mass the mass of one mole of a substance
, How many protons, neutrons, and electrons are in an atom of gold-197? (refer to periodic
table) 79, 118, 79
Explain the experimental discovery that led Rutherford to abandon Thomson's model and
propose a new one. Some alpha particles were deflected at large angles as if they had struck
regions of high positive charge and large mass.
Name 3 true statements about a proton. * A proton has +1 charge
* A proton has a mass of about 1.0 amu
* The number of protons determines the identity of an element
How many electrons doed the Ne atom have? 10 electrons
A neutral atom has 42 protons and 56 neutrons.
-How many electrons?
-Mass Number?
-Symbol of this atom? -42 electrons
-98
-98
Mo
42
An atom has an atomic symbol of ^27 Al.
-Protons?
-Neutrons?
-Electrons?
-Mass Number? -13
LATEST UPDATE GRADED A+
To calculate molecular mass and formula mass, you________ the atomic mass of each element
in the chemical formula by the_______ for that element then______ the products. multiply;
subscripts; add
Find the molecular mass of sugar. (C6H12O6) 180.10 amu
Calculate the average atomic mass of Ne's three isotopes.
Ne-20: 90.4838%; 19.9924 amu
Ne-21: .02696%; 20.9940 amu
Me-22: 9.2465%; 21.9914 amu 20.1799 amu
1 amu essentially has the same mass of 1__________. proton
To deal with large numbers in chemistry, we need a unit that can relate macroscopic quantities-
__________- to particles. microscopic quantities
mole (mol) amount of a substance that contains Avogardo's number of particles
Avogardo's number (Na) -The # of atoms in exactly 12 g of carbon-12 and it is the number of
particles in one mol of a substance
What is Avogadro's number? 6.022 x 10^23 atoms
molar mass the mass of one mole of a substance
, How many protons, neutrons, and electrons are in an atom of gold-197? (refer to periodic
table) 79, 118, 79
Explain the experimental discovery that led Rutherford to abandon Thomson's model and
propose a new one. Some alpha particles were deflected at large angles as if they had struck
regions of high positive charge and large mass.
Name 3 true statements about a proton. * A proton has +1 charge
* A proton has a mass of about 1.0 amu
* The number of protons determines the identity of an element
How many electrons doed the Ne atom have? 10 electrons
A neutral atom has 42 protons and 56 neutrons.
-How many electrons?
-Mass Number?
-Symbol of this atom? -42 electrons
-98
-98
Mo
42
An atom has an atomic symbol of ^27 Al.
-Protons?
-Neutrons?
-Electrons?
-Mass Number? -13
