11. Iron is a solid metal, and oxygen is a gas. When iron and oxygen atoms combine, they form a solid called iron oxide.
How should iron oxide be categorized?
A atom
B element
C gas
D molecule

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Aquantity of gas has a volume of 18 m3 and an absolute temperature of 225 k. when the temperature of the gas is raised to 380 k, what is the new volume of the gas? (assume that there’s no change in pressure.)