Acertain radionuclide is used to diagnose lymphoma. an atom of this radionuclide contains 31 protons and 36 neutrons. which statement is correct about the radionuclide?
a. the atomic number is 31, the mass number is 67, and its symbol is 67/31 ga.
b. the atomic number is 31, the mass number is 67, and its symbol is 31/64 ga.
c. the atomic number is 67, the mass number is 31, and its symbol is 67/31 ga .
d. the atomic number is 67, the mass number is 31, and its symbol is 31/64 ga .

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]

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?