10. Identify the following reactions as synthesis, decomposition, single replacement,
double replacement, or combustion.
a. Pb(NO3)2 + 2HCI
- PbCl2 + 2HNO3
b. 2C2H6 + 702 -> 4CO2 + 6H2O
c. Ca + 2HCl - CaCl2 + H2
d. 2502 + O2 - 2503
e. 2Ni, → 4Ni + 302

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)