counting atoms
which chemical formula correctly displays 1 atom of nickel and 2 atoms of fluorine?
niF2, NIF2, NiF2, Ni1F2,
NiF2
in the equation 2Mg + O2 --> 2MgO, which are reactants?
Mg and O
In the equation 2 Al2 O3-->4Al+3 O2, what is the mole ratio of Al to O2
what are three subatomic particles?
electron, proton, neutron
Molar mass is in units of what?
grams/mole
A subscript is the small number below a (blank) that tells the number of (blank) of that element
element symbol, atoms
balance the following equation
SeCl6+ O2--> SeO2+ Cl2
1,1,1,3
in the reaction 2 H2 + O2--> 2 H2O what is the mole ratio of O2 to H2O
1 Mol O2/ 2 Mol H2O
which model does not able to explain the stability of an atom?
Rutherford's model
how many particles are in a mole?
6.022 X 1023
Number of H in 3(NH4)2CrO4?
Mg + HCl--> MgCl2+H2
Is this decompostion, combustion, single replacement or synthesis
single replacement
the molar mass of table salt (NaCl) is 58.44 g/mol. this is the mass of (blank) mol of the substance
1 mol
expiermentation with cathode-ray led to the discovery of what?
electrons
how many moles are present in 32.3 grams of carbon dioxide (CO2)
0.73 moles
what is the total number of atoms in this formula?H2O2
4
what is the right part of the chemical equation called?
2H2 + O2--> 2H2O
products
Cl2 + 2KBR > Br2+ 2KCl, How many moles of Br2 are produced to with 60 g of KBr?
the principal quantum number describes what?
size of the orbital
what element has an atomic number of 28?
nickel
how many sodium (Na) are in 6NaCl
6
2Hl-->H2+L2
is this decompsotion, double replacement, single replacement or synthesis
decompsotion
2NaClO3 (s) > 2NaCl(S) + 3O2(g), how many g of of O2 are produced to with 6 moles of NaClO32?
3 Mol O2/ 2 Mol NaClO3
which of the following quantities can only be a whole number?
Atomic radius, Atomic number, Maa number, or equivalent weight
atomic number
what is the defention of Avagrados number?
6.02 X 1023 particles per mole of a substance