Apiece of gold jewelry weighs 11.54 g and has a volume of 0.675 cm3. the jewelry contains only gold (density = 19.3 g/cm3) and silver (density = 10.5 g/cm3). assuming that the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold in the jewelry.
Answers: 3
Chemistry, 22.06.2019 18:00
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]
Answers: 1
Chemistry, 22.06.2019 20:30
Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4:
Answers: 1
Chemistry, 22.06.2019 21:00
Write a balanced equation showing the formation of copper (ii) nitrite from its elements
Answers: 1
Chemistry, 23.06.2019 01:30
Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2
Answers: 3
Apiece of gold jewelry weighs 11.54 g and has a volume of 0.675 cm3. the jewelry contains only gold...
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31
Computers and Technology, 01.11.2019 02:31