30) Which of these statements are true? 1 chromosome is made of DNA
2 chromosomes are found in the cell membrane
3 chromosomes are always formed from a single gene
4 genes are short sections of DNA

A) 1, 2, 3 and 4
B) 2, 3 and 4
C) 2 and 3
D) 1 and 4

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa

Correct relationship between molecular formula and empirical formula

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]