Matter is classified as a
(1) substance, only
(2) substance or as a mixture of substances
(3) homogenous mixture, only
(4) homogenous mixture or as a heterogeneous mixture

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

In which direction will the following reaction go if the standard reduction potentials are 0.80 v for ag/ag+ and –0.44 v for fe/fe2+? ag+ + fe → ag + fe2+ a.)forward b.)the reaction cannot occur. c.) not enough information is given. d.) reverse

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.