Can anyone good at chemistry help?? Please I’ll mark brainliest! 20 points

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180

How many joules of heat are required to raise thetemperature of 750 g of water from 11.0 °c to 19.0 °c?