A radioactive metal atom decays by emitting an alpha particle, which is a helium nucleus. The
alpha particles are collected as helium gas. A sample of helium with a volume of 12.05 mL was
obtained at 765 mmHg and 23 °C. How many atoms decayed during the period of the
experiment?

Why are people not able to skip a dive to the deepest part of the ocean

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Write a balanced equation showing the formation of copper (ii) nitrite from its elements