Trộn 100ml dung dịch HCl 0,8M với 400ml dung dịch Ca(OH)2 0,15M được dung dịch D. Tính nồng độ mol/lít của ion OHcó trong dung dịch D .

Which is true of the reactants in this displacement reaction? fe + 2hcl fecl2 + h2 a. the reactants are located to the left of the arrow in the chemical equation. b. the reactants contain 1 iron atom, 2 hydrogen atoms, and 1 chlorine atom. c. the reactants are the atoms, molecules, or compounds formed in the reaction. d. the reactants have the same physical and chemical properties as the products.

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: