What is the symbol for element with atomic number 74?

A 2.5-liter sample of a gas at 2.0 atm and 300.0 K has 0.30 mole of the gas. If 0.15 mole of the gas is added to the sample at the same temperature and pressure, what is the final volume of the gas? 3.4 liters 3.8 liters 4.2 liters 4.7 liters

Leucippus and Democritus proposed the "first" atomic view of matter. They arrived at this view based on A) many experiments. B) careful measurements. C) philosophical and intuitive speculation. D) All of the above contributed to their atomic view.

The maximum efficiency possible in an energy conversion process that is not limited by the second law of thermodynamics --100% --1% --95% --30%

How many Oxygen (O) atoms are in the following? H2O + CO2 3 2 4

Technician A says that objects with high permeability allow magnetic lines of flux to flow easily through their material.

A 55.3 g sample of lead heated and then quenched in a 175g sample of water. During the quenching reaction the temperature of the water increases from room temperature, 25.0 °C, to 42.6 °C.

What conclusion can you draw from this experiment about the components of the black ink

How does the size of ions affect the conductivity of a solution?

How to write complete ionic and net ionic equations?

chromium can combine with chlorine to from corneum chloride which equation is a correct representation of this reaction