10 POINTS WITH A FOLLOW. NO LINKS OR REPORT. HELPP!! In a calorimetry lab, sodium oxide is combined with water. Compute the heat released in the formation of 1.99 grams of sodium hydroxide. Na2O + H2O -> 2NaOH + 215. 76 kJ​

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced