Answer:
Absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer
Physical change is a change in color texture and ect chemical is the change in the actual substance
Percentage error = ((12.7/11.5)-100%)x 100% = 10.4% (3 s.f.)
Since the measured yield exceeds the theoretical one, this means the error is in excess. Divide the measured yield by the theoretical yield and subtract 100% to find the difference, then multiply by 100% to find the percentage.
POTASSIUM SULFATE hope this helps
A and D
Density is mass over volume, if mass decreases or volume increases density decreases