In 1969, humans landed on the moon for the first time. did the astronaut's weight or mass change?

The answer to your question is: letter C

Explanation:

Decomposition reaction is when one reactant gives two or more products.

a. 2SO2 + O2 —> 2S03                          This is a combination reaction

b. Zn + Cu(NO3)2 → Zn(NO3)2 + Cu      This is a single replacement reaction.

c. 2H2O2–> 2H2O + O2                         This is a decomposition reaction

d . AgNO3 + NaCl → AgCl + NaNO3      This is a double replacement reaction