Identify the reaction type and balance it

3. _Zn + _HCI → _ZnCl2 + _H2

4. What structural characteristics do all hydrogen atoms have in common?

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. what is the empirical formula of thegiven compound?

What substance reacts with acid to form hydrogen gas is it one of the below Carbonate, oxygen, carbon dioxide, magnesium ribbon, gold which one?

A change in the properties of matter that does not change the makeup of the substance is a chemical change a physical change a nuclear change a covalent change

If 2.00g of p-aminophenol (109.1 g/mol) reacts with 5.00 ml of acetic anhydride (102.1 g/mol and density = 1.08 g/ml), what mass of acetaminophen (180.2 g/mol) would be made? show all calculations.

What is the molarity of a solution containing 5.0 moles of kcl in 2.0 l of solution?

Compare the electron configurations of hydrogen, lithium, and sodium. Why do you think these elements are grouped in the same family?

What is the theoretical yield of silver chloride?

Calculate the cell potential for the galvanic cell in which the reaction Fe (s) + Au 3 + (aq) - ⇀ ↽ - Fe 3 + (aq) + Au (s) occurs at 25 ∘ C, given that [ Fe 3 + ] = 0.00150 M and [ Au 3 + ] = 0.797 M.

Magnesium is lighter than other structural metals, so it is increasingly important in the design of more efficient vehicles.