How do the isotopes of Be-9 and Be-7 differ?
A. Be-9 has 2 more electrons than Be-7.
B. Be-9...
Chemistry, 25.02.2021 21:00 laceybabin1952
How do the isotopes of Be-9 and Be-7 differ?
A. Be-9 has 2 more electrons than Be-7.
B. Be-9 has 2 more protons than Be-7.
C. Be-9 has 2 more neutrons than Be-7.
D. There is no difference. They are exactly the same.
Answers: 1
Chemistry, 22.06.2019 06:00
How many atoms of mg are present in 97.22 grams of mg? 6.022 Γ 1023 2.408 Γ 1024 4.818 Γ 1024 5.855 Γ 1025
Answers: 2
Chemistry, 22.06.2019 08:00
Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in clβ. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42β. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the clβ ion. its concentration is half that of the clβ ion. its concentration is twice that of the clβ ion. its concentration is one-third that of the clβ ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback
Answers: 3
Chemistry, 22.06.2019 08:30
What are the first three quantum numbers for the electrons located in subshell 2s?
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
Mathematics, 16.02.2021 03:40
Mathematics, 16.02.2021 03:40
English, 16.02.2021 03:40
Mathematics, 16.02.2021 03:40
Health, 16.02.2021 03:40
Mathematics, 16.02.2021 03:40