Which reaction is an acid-base neutralization reaction? A. Mg + 2HCl → MgCl2 + H2

B. HCl + NaOH → NaCl2 + H2O

C. SiCl4 → Si2 + 2Cl2

D. N2 + 3H2 → 2NH3

Which sound characteristic is not affected by the relative motion of an object

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above