CH4 + 2O2 = CO2 + 2H2O If 1 mole of methane reacts with 2 moles of oxygen, then:
a. 1 mole of CO2 anf 2 moles of H2O are produced.
b. 2 moles of CO2 and 1 mole of H2O are produced.
c. 2 moles of CO2 and 2 moles of H2O are produced.
d. 1 mole of CO2 and 1 mole of H2O are produced.

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What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?