The fossil record provides evidence of past life as well as clues to the past climate, environment, and abiotic factors in an area. True or false

Three bulbs are connected by tubing, and the tubing is evacuated. The volume of the tubing is 47.0 mL. The first bulb has a volume of 30.0 mL and contains 4.49 atm of argon, the second bulb has a volume of 250 mL and contains 2.

the absolute tempeature of a gas is increased four times while maintaining a constant volume. what happens to the pressure of the gas

Magnetic stripes on the seafloor are caused in part by: A. tidal forces. B. gravity. C. movement of ocean crust. D. declination of the poles.

For the reaction shown here, 2.3 mola is mixed with 1.6 molb and 3.1 molc. what is the limiting reactant? 3a+b+2c→3d

What subatomic particles do the following symbols represent in the atomic diagrams

A sample of hydrogen gas is mixed with water vapor. The mixture has a total pressure of 755 torr and the water vapor has a partial pressure of 24 torr. What amount (in moles) of hydrogen gas is contained in 1.55 L of this mixture at 298 K?

Both equation I and II are balanced, but equation II is the correct way to write the balanced equation. Why do you think this is? (Hint: Think fractions.) I) 2 SnO2 + 4 H2 → 2 Sn + 4 H2O II) SnO2 + 2 H2 → Sn + 2 H2O

If some of the salt remains adhered to the weighing paper (and therefore is not transferred to the calorimeter), will the enthalpy of solution for the salt be reported too high or too low?

In one process, 5.95 kg of caf2 is treated with an excess of h2so4 and yields 2.45 kg of hf. calculate the percent yield of hf.

What are 3 ways to increase the solubility of a solid substance in a solid?