I need help with sci bellwork i will give brainiest​ 12 points

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures

Select the statement that describe chemical properties a. antacid tablets neutralize stomach acid b. helium is the lightest monatomic element c. water freezes at 0 celsius d. mercury is liquid at room temperature

What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?