In an investigation,
the volume of a
material is measured
as 80.0 cm3 and its
mass is measured
as 253 g.
Which
calculation of density
correctly uses the
precision rules:
3.1625 g/cm3,
3.163 g/cm3,
3.16 g/cm3,
3.2 g/cm3,
or 3 g/cm3?

Apush or pull that moves or changes and object when to objects touch

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]

Which sample at stp has the same number of atoms as 18 liters of ne at stp