A concept map for four types of intermolecular forces in certain type of bond is shown compare the relative strength of the two forces B and C. Explain how you determine this comparison by identifying the forces Will give brainliest please help !!

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

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]