In the laboratory, an unknown element x reacts with fluorine. the following ionic compound is obtained: xf.
according to the valence electrons of fluorine, to which family does the element x belong?
select one:
a. halogen
b. alkali metals
c. noble gases
d. alkaline earth metals

How much energy moves onto the next level, in an energy pyramid

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0