Which of the following is a physical change? (1 point)
sawing a piece of wood in half
burning a piece of wood
rust forming on an iron fence
a copper roof changing color from red to green

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.

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block