Which of the following samples contain the greatest number of atoms?
a. 2.0 mol of Ar (Argon)
...
Chemistry, 20.02.2021 22:20 ariana7245
Which of the following samples contain the greatest number of atoms?
a. 2.0 mol of Ar (Argon)
b. 20 million of O2 (Oxygen) molecules
c. 5g of He (Hellium)
d. 100 g of Pb (Lead)
Answers: 2
Chemistry, 22.06.2019 15:00
Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.
Answers: 1
Chemistry, 22.06.2019 16:30
An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:
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 22:10
Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water
Answers: 3
Mathematics, 17.03.2020 19:43
Physics, 17.03.2020 19:44
Mathematics, 17.03.2020 19:44
Mathematics, 17.03.2020 19:44
English, 17.03.2020 19:44
Physics, 17.03.2020 19:44
Biology, 17.03.2020 19:44