Which of the following represents the least number of molecues?
(a)20.0 g of h2o (18.02g/mol)
(b)77.0 g of ch4 (16.06 g/mol)
(c)68.0 g of cah2 (42.09 g/mol)
(d)100.0 g of n2o (44.02 g/mol)
(e)84.0 g of hf (20.01 g/mol)

0.09 moles of sodium sulfate in 12 ml of solution

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.