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.

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

How are isotopes of the same chemical element alike? how are they different?

How can one make a supersaturated solution? (apex)