Which one of the following elements is most likely to form a 2– ion?
question 4 options:

a) selenium

b) scandium

c) silicon

d) strontium

e) iodine

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

How many moles of gas are present if p=11 atm, v=12l, t=185k?