Plz answer first one to answer gets | |＿      ＿    |    ＿⚡ |      |    |＿|  |    |＿|⚡ |      |    |＿    |    |        ⚡ ❕~    ＿        ⚡ |ー|ー|      |＿|      ❕ |        |        |      |＿ 

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

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.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.