chem exam 2
what is the charge on Fe in Fe3(PO4)2
+2
what is the oxidation number of Mn in KMnO4
+7
what is the formula mass of the compound formed between Al3+ and Cl- 187.5 u 62.5 u 116.5 u 133.5 u
133.5 u
what is the coefficient in front of ammonia in the balanced equation? NH3 + H2SO4 -> (NH4)SO4
2
in the following reaction if 0.86 moles of MnO2 and 48.2 grams of HCl react, how many grams of Cl2 will be produced? 4HCl + MnO2 -> Cl2+ 2H2O + MnCl2
23.5 g
which species would be considered a spectator ion based on the following equation Ba2+ + 2NO3- + 2Na+ + SO42+ -> BaSO4 + 2NO3- + 2Na+
2NO3-
how many moles of K+ and P3- ions are present in 2 moles of K3P?
6.00 mol K+ and 2.00 mol P3-
in the following reaction, if 0.86 moles of MnO2 and 48.2 grams of HCl were reacted forming 19.8 grams of Cl2 in the lab, what is the percent yield? 4HCl + MnO2 -> Cl2+ 2H2O + MnCl2
84.26%
the correct formula for the ionic compound containing Al3+ and PO would be Al3(PO4)3 AlPO4 Al3(PO4)2 Al2(PO4)3
AlPO4
Which ions will appear in the total ionic equation for the following reaction? Ba2+ + Co2-/3 + 2H+ + SO 2-/4 + CO2 + H2O + BaSO 4
Ba2+, CO2-/3, H+ and So2-/4
which of the following has a noble gas configuration Cl O- Br- Cl+
Br-
which of the following molecules would be classified as polar covalent NaCl CH3Cl KCl CaCl2
CH3Cl
which of the following metals would not use a Roman numeral as part of its name in a compound Cr Mn Co Ca
Ca
what substance is oxidized in the following reaction? 4HCl+ MnO2-> Cl2 + 2H2O + MnCl2
Cl in HCl
the correct formula of an ionic compound containing Fe2+ and ClO is FeClO4 Fe2(ClO4)3 Fe(ClO4)2 Fe3(ClO4)2
Fe(ClO4)2
in the following reaction, if 0.86 moles of MnO2 and 48.2 grams of Hal react, which reagent will be used up first? (limiting reagent) 4HCl + MnO2 -> Cl2+ 2H2O + MnCl2
HCl
what substance is the reducing agent in the following reaction? 4HCl+ MnO2-> Cl2 + 2H2O + MnCl2
HCl
when magnesium forms an ion, it would be represented as
Mg2+
the ionic compound that forms between magnesium (Mg) and oxygen (O) has the formula
MgO
during the formation of an ionic bond between Na and N, which of the following reactions occurs? Na-> Na2+ + 2e- Na+ + 1e- -> Na N + 3e- ->N3- N-> N3+ +3e-
N + 3e- -> N3-
which of the following has the highest electronegativity? O N Si P
O
when an ionic compound forms between sodium (Na) and bromine (Br) atoms, it is true that a bromine atom donates an electron to a sodium atom both the bromine atoms and sodium atoms donate electrons to each other a sodium atom donates an electron to a bromine atom neither bromine nor sodium atoms donate electrons to each other
a sodium atom donates an electron to a bromine atom
the reaction below would be considered CaCo3+ heat-> CaO + CO2
an endothermic decomposition
the correct name for BaCO3 is barium trioxide barium monocarbon trioxide barium carbonate barium monocarbonate
barium carbonate
the molecular structure of water should be
bent because of the unshared electrons on the molecule
what would be the proper name for the following binary ionic compound CaBr2
calcium bromide
name the following ion CO2(SO4)3
cobalt (III) sulfate
the rigid three dimensional arrangement assumed by the ions of ionic compounds is called a
crystal lattice
the correct name for the covalent compound N2O4 is dinitrogen tetroxide nitrogen oxide nitrogen quartoxide dinitrogen quartoxide
dinitrogen tetroxide
which type of interparticle forces leads to compounds with the lowest melting points
dispersion
true or false the reaction Mg + 3N2-> Mg3N2 is correctly balanced as written
false
which of the following would cause a calcium ion (Ca) to achieve a noble gas configuration? lose one electron gain one electron lose two electrons gain two electrons
lose two electrons
identify the correct way to name a binary ionic compound?
name= metal + nonmetal stem + -ide
barium sulfate is often ingested to aid in the diagnosis of GI tract disorders. The equation for its production is Ba2+ + SO-> BaSO4. what type of equation is this?
net ionic equation
which of the following statements is correct with reference to covalent bonding? covalent bonds only form between like atoms the non polar covalent bond is the reason for hydrogen bonding polyatomic compounds contain only covalent bonds none of these is a correct statement
none of these is a correct statement
identify the rule that states that atoms will gain or lose sufficient electrons to achieve an outer electron arrangement identical to that of a noble gas
octet rule
if the electronegativity difference between A and B is 0.8, what type of bond is formed between the two elements? polar covalent nonpolar covalent ionic metallic
polar covalent (0.1-1.99)
the correct name for KHPO4 is
potassium hydrogen phosphate
the correct name for K2SO4 is
potassium sulfate
some elements can display more than one charge. the most stable charge is due to having 6 electrons in the outside orbit that charge produced by a loss of electrons, not a gain of electrons the charge produced by the noble gas configuration all are correct
the charge produced by the noble gas configuration
the shape of a BF3 molecule is
trigonal planar
true or false the oxidation number of Cr in K2CrO4 is +6
true
a covalent bond results when
two atoms share a pair of electrons
