A gas is allowed to expand, at constant temperature, from a volume of 1.0 L to 10.1 L against an external pressure of

0.50 atm. If the gas absorbs 250 J of heat from the surroundings, what are the values of q, w, and a

9

AU

During what what phase of the moon can a lunar eclipse occur? A. New moon B. First quarter C. Waxing gibbous D. Full moon

Which structure of the cell controls what goes in and comes out of the cell? cell Which structure is a strong layer around plant cells? cell

How did the building of granaries indicate that Harappan civilization was economically strong?

Based upon the ion charge of the following polyatomic ions, predict the formula for the following compounds. sulfate = SO4 - 2 phosphate = PO4 - 3 hydroxide = OH - sodium sulfate NaSo4 Na2SO4 Na (SO4) 2 NaSO8

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. Which is a logical conclusion about these electromagnetic waves?

Human muscle stores sugars in the form of

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?