Cho 8,1 gam nhôm tác dụng với 29,4 gam axit sunfuric thu được khí hidro và muối nhôm sunfat a. Tính thể tích khí hidro thu được (đktc)?
b. Tính khối lượng muối nhôm sunfat tạo thành

Pbco3 –> pbo+ co2. how many liters of carbon dioxide gas is produced from the decomposition of 32 grams of lead (ll) carbonate?

What element breaks down into yttrium-90?

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