Carbon can be burned in oxygen to produce CO2 gas. Sand and quartz are two common forms of SiO2, which makes up over half of the Earth’s crust. Name two other elements (X) that are likely to form a compound with the formula XO2.

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.