Find the 10th term of the geometric sequence 10,-20,40

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.

How many moles of gas are present if p=11 atm, v=12l, t=185k?

The minerals found in bones are deposited by living cells called