Classify the type of matter of each of the three components studied in this lab A. Iron filings (Fe):
B. Salt (NaCI):
C. Sand (SiO2):

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?