Assuming ideal gas behaviour, what would be the density of gaseous hydrogen selenide (H2Se) at 26 °C and 766 mmHg?

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.

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa