Which element has an atomic number 10 and an atomic mass of 20

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

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.

What does the symbol (–hfus) indicate in a phase change?