It should be 0.25 M. Use the formula C1*V1=C2*V2, for those values, as it is right when it changed colour. Remember to change the if those are not the same (but in your case it is, so no need this time).
C1*V1=C2*V2
C1*27ml=0.55M*12.5ml
C1=(0.55M*12.5ml)/27ml = 0.25M
Answer:
different isotopes of na element
Answer:
Because the Ocean is the reason our climate even exists, if the ocean's temperature, water parameters, and so on changed, then a cold ocean current would lower air temperatures in a certain area, form cold fog/misty conditions, and result in rapid radiation cooling.
I'm not an expert, but I hope that helps.
Answer:b
Explanation: the particles will soon dissolve which means that the particles are changing but the volume is staying the same and the concentration is changing