If 2.34 g of nacl was formed how many moles of nahco3 must have been used in the reaction? (report only the numerical portion of your answer [i.
e. leave off the units] to 3 significant digits)

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