Toxicologist use the term LD₅₀ to describe the number of grams of a substance per Kilogram of body weight that is a lethal dose for 50 percent of animals. Calculate the LD₅₀ for a 60Kg man of 2.56 x 10²⁶ molecules of As₂O₃

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

What substance has a mass of 9.5g and volume of 2.1cm^3

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers