A battery operated device was created to control the speed and rhythm of which human organ

Iron (II) sulfide reacts with hydrochloric acid according to the reaction: FeS (s) + 2 HCl (aq) → FeCl2 (s) + H2S (g) A reaction mixture initially contains 0.223 mol FeS and 0.652 mol HCl.

What would be the correct name for element 119?

What is water classified as

How many protons, neutrons, electrons, does isotope number 19 and mass of 39?

An oxide of aluminum contains 0.545 g of Al and 0.485 g of O. Find the empirical formula for the oxide.

Why does the moon have phases? What are the four main phases of the moon? How long does it take to change from one to another?

How many atoms are in 1/2 mole of calcium

Which of the following units is best when measuring the mass of an object?

When balancing an equation, should you adjust the subscripts or the coefficients?

How does the sun warm the earth