5. Object 1 and Object 2 float in beakers of water as shown below. Which of the following statements about the objects must be true? Object 1
Object 2
Water density 1 ml
Wafer density gimu
O A. The density of Object 1 is less than 1 g/cm! The density of Object 2 is greater than 1 g/cm!
OB. The densities of both objects are greater than 1 g/cm!
OC. The density of Object 1 is greater than the density of Object 2
The density of Object 2 is greater than the density of Object 1

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

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

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n