A Identify the exact numbers.
2.54 cm (the number of centimeters in exactly 1 in)
4 choices (the number of choices in this list)
56.00 s (a time measured by a stopwatch)
3 lbs (the weight of an object measured on a scale)

Non renewable resources like petroleum eventually

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

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.