知到答案Basic Chemistry 基础化学智慧树答案_2022年

第五章

The correct name for K2S is __________.
potassium sulfate
potassium bisulfide
potassium disulfide
potassium sulfide
答案:potassium sulfide
The correct name for H2SO3 is __________.
sulfurous acid
sulfur hydroxide
sulfuric acid
hydrosulfuric acidThe correct name of the compound Na3N is __________.
sodium trinitride
trisodium nitride
sodium nitride
sodium azideThe ions Ca2+ and PO43- form a salt with the formula __________.Element M reacts with fluorine to form an ionic compound with the formula MF3 . The M-ion has 18 electrons. Element M is __________.
Ca
Cr
Sc
PThe conjugate base of HSO4- isWhat is the pH of an aqueous solution at 25.0 °C in which [H+] is 0.00250 M?
3.4
2.6
-3.4
-2.6What is the concentration (in M) of hydronium ions in a solution at 25.0 °C with pH = 4.282?
9.71
1.66 × 104What is the pH of a 0.0150 M aqueous solution of barium hydroxide?
1.52
12.2
1.82
10.4