The word equation for the reaction is: iron + chlorine iron chloride
Iron chloride is a solid.
The teacher weighed the glass tube and contents:
. before the reaction
. after the reaction.
What happened to the mass of the glass tube and contents during the reaction?
Give one reason for your answer.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.