Which of these is a physical property? a)flammability b)toxicity c)heat of combustion d)compressibility

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.

How many grams of carbon are in 237 grams of ethanol(c2h5oh) and how many sulfide ions are in 2.45 moles of aluminum sulfide show me you you got the answers