A student overshot the equivalence point when he was using NaOH to determine the
concentration of an unknown acid, HA.
What ions are present in the purple
solution in the flask?
A. H+, A-, Na+ and OH-
B. A-, Na+ and OH-
C. A-, Na+ and H+

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

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

What can be found in the ionosphere