PLEASE HELP Assuming that all the energy given off in the reaction goes to heating up only the air in the house, determine the mass of
methane required to heat the air in a house by 15.0°C. Assume each of the following: house dimensions are 30.0 mx
25.0 m x 3.2 m; specific heat capacity of air is 30 J/K mol; 1.00 mol of air occupies 22.4L for all temperatures
concerned.
Express your answer using two significant figures.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a