exam 2 (chem1301)

how many protons are in the atom

12C

6

• none of these

• 5

• 18

• 12

• 6

which of the following is the correct formula for sodium sulfite?

• Na2SO3

• SSO3

• NaSO3

• Na2SO4

• NaSO4

the symbol for the rubidium ion is

• R^2+

• Rb^2+

• Ru

• Rb+

• R+

which of the following is a metalloid?

• bromine

• tin

• aluminum

• silicone

• iodine

when the following equations are balanced using the smallest possible integers, what will be the coefficient for the underlined substance in each case?

N2(g) + O2(g) --> N2O3

• 2

• 1

• 3

• 4

• 6

what is the correct formula for lithium phosphate?

• LPO3

• LP4

• LiPO4

• Li(PO4)3

• Li3PO4

sodium chlorite has the formula

• NaClO2

• NaCl

• NaClO

• NalO3

• NaClO4

which of the following statements is NOT true of balancing a chemical equation?

• all of these statements are true

• coefficients are used to balance the atoms on both sides

• the law of conservation of matter must be followed

• phases are often shown for each compound but are not critical for balancing an equation

• subscripts in the reactants must be conserved in the products

the correct name for P2O5 is

• phosphorus (V) oxide

• diphosphorus oxide

• phosphorus pentoxide

• phosphorus(II) oxide

• diphosphorus pentoxide

the symbol for the element mercury is ___

• He

• Mn

• none of these

• Hg

• Mg