Que clase de ecuación química son:
a. be+so2 = beso4
b. cl2 + 2nabr = 2nacl + br2
c. beco3 + 2hcl = becl2 + h2co3
d. mg(no3)2 + koh = mg(oh)2 + kno3
e. cao + h2o = ca(oh)2
y porque? ?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Enzymes affect the reactions in living cells by changing the

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory