Reshma put 10 cm3 of water and 2 g of a different solid into each of four test-tubes. She shook each test-tube.
The drawings show the test-tubes after 10 minutes.

Why can the salt and sugar no longer be seen in test-tubes A and C?

What must happen before a body cell can begin mitotic cell division

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

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?