What is the formula of this polyatomic ion, Sodium Acetate?
NaCH3COO
100
To balance a chemical equation you may adjest the,
A) formulas
B) coefficients
C) number of reactants
D) subscrips
Coefficients
100
Distinguish between a cation and an anion.
cation are (+) and anions are (-)
100
What is the number of molecules in 2.00 mol H2O?
1.2X10^24 molecules
100
Determine the percent composition of each element in Ba(NO3)2.
Ba=53%
N=11%
O=37%
200
What is the name of this inonic compound, BaS?
Barium Sulfide
200
What is the balance equation for the reaction between sodium and chlorine gas to produce sodium chloride or table salt, Na + Cl2 → NaCl?
2Na + Cl → 2NaCl
200
What is the atom symbol for this atom, gold which has .79 protons and 118 neutrons?
197Au
79
200
What is the mass in grams of each of the following samples?
a. 3.500 mol Ca(OH)2
b. 0.625 mol Ba(NO3)2
a. 259g
b. 163.13g
200
What is the triple point for cabon dioxide?
5 atm
300
What is a covalent bond?
A covalent bond is a bond formed when atoms share one or more pairs of electrons.
300
Write the word equation for the following reaction, Nickel reacts with lead nitrate to produce nickel nitrate and lead. Then write the correct formula for the reactant and product. Finally use coefficients to balance the chamical equation.
nickel + lead nitrate → nickel nitrate + lead
Ni + Pb(NO3)2 → Ni(NO3)2 +Pb
300
Which electron configuration shows an electron in an excited state?
A) 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6
B) 1s2,2s2,2p6,3s2,3p5,3d10,4s2,4p6
C) 1s2,2s2,2p6,3s2,3p6
D) 1s2,2s2,2p6,3s2,3p6,3d10,4s1
B) 1s2,2s2,2p6,3s2,3p5,3d10,4s2,4p6
300
What is the number of moles in each of the following compounds?
a. 4.5 g H2O
b. 129.68 g Fe3(PO4)2
a. 0.25 mol
b. 0.36 mol
300
What is does aq, s, g and l stand for?
aques
solid
gas
liquid
400
What is the structural formula for C, two Cls, and 2 Fs?
Cl
F-C-F
Cl
400
What is balanced equation when calcium oxide reacts with water to form calcium hydroxide?
CaO + H2O → Ca(OH)2; synthesis
400
Which elements are designated as the alkali metals?
Group 1
400
Chemical analysis of citric acid shows that it contains 37.51% C, 4.20% H, and 58.29% O. What is its empirical formula?
C3H4O3
400
What the name of SO4 ion?
sulfate
500
What is the chemical name for the the compound, Np3O8?
trineptunium octoxide
500
What is the word equation and balanced equation for zinc that is placed in a solution of coooper(II) sulfate?
Define the following periodic trends:
ionization
atomic radii
electronegativity
ionization energy- minimum energy required to remove an election from a neutral atom.
atomic radii- the size of an atom.
electronegativity- an atoms ability to attract electrons.
500
Determine the molecular formula of the compound withan empirical formula of CH and a formula mass of 78.110g/mol.
C6H6
500
What did Norm Anderson have in has blood and pockets from the Mole Airlines Flight lab? Give the name and formula.