PLZ PLZ PLZ HELP A weekly forecast is shown below. What type of front can be predicted to arrive on Sunday?

A.) Warm Front
B.) Stationary front
C.) Cold front
D.) Occluded front

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

How might this scientific phenomena be explained? a paper clip floats on water.

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume