How many milligrams remain of a 15.0 mg sample of radium-226 after 6396 years? The half life of radium-226 is 1599 years.

Why is pure water not a conductor of electricity? A. Pure water has no free ions. B. Pure water has many dissolved solids. C. Pure water has few dissolved solids. D. Pure water has many free ions.

In the gas-phase reaction 2A + B 3C + 2D, it was found that, when 1.00 mol A, 2.00 mol B, and 1.00 mol D were mixed and allowed to reach equilibrium at 25°C, the resulting mixture contained 0.90 mol C at a total pressure of 1.00 bar. 1.

If a cell is isotonic with a 0.88% nacl solution, how would an extracellular fluid with 1% nacl affect the cell?

Is mixing paint a physical change if it is why

Which of the following aspects of kinetic-molecular theory explain why a plasma-based light doesn't get unbearably hot? Select all that apply. 1. Particles exchange energy through elastic collisions. 2. All particles are in constant random motion. 3.

Why is it important to heat analytical reagents and store them in a dessicated atmosphere before use?

What process occurs as pieces of dry ice get smaller

What happens to ice as it melts? A. The average kinetic energy of the water molecules decreases. B. The released energy increases the intermolecular forces. C. The absorbed energy breaks apart intermolecular forces. D.

Why do scientists think that the solar nebula is important for earth

How many liters in. 75 moles of methane gas at stp?