A glass sphere is filled to full volume with a gas. The pressure of the gas inside the sphere is 30.0 atm, and the temperature is 25.00C. The sphere is taken outside on a cold day. The temperature of the gas decreases to 10.00 C. What is the new pressure of the gas? Assume that the volume is constant.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

One similarity and one difference between an element and a mixture of elements