Using the phase diagram for CO2 what phase is carbon dioxide in at -70C and 1 atm pressure

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town