Aweather balloon on the ground has a volume of 200 l at 25.0 °c when filled with helium to a pressure of 100 kpa. what is the volume of the balloon (in l) at 9000 m, where the temperature is –50.0 °c and the pressure is 19.5 kpa?

What is a metal replacement reaction

How much mass would a mole of hydrogen molecules contain? recall that hydrogen is diatomic. g/mol

The standard emf for the cell using the overall cell reaction below is +2.20 v: 2al(s) + 3i2(s) → 2ai3+(aq) + 6i-(aq) the emf generated by the cell when [ai3+] = 3.5 × 10-3 m and [i-] = 0.015 m is v. the standard emf for the cell using the overall cell reaction below is +2.20 v: 2al(s) + 3i2(s) 2ai3+(aq) + 6i-(aq) the emf generated by the cell when [ai3+] = 3.5 × 10-3 m and [i-] = 0.015 m is v. 2.36 2.24 2.21 2.51 2.04