Chemistry, 12.10.2020 21:01 destanybrunson
Which of the stars shown, other than the Sun, would be good candidates for finding an Earth-like planet? Select 1-2 stars, and explain why.
The star choices:
Aldebaran
Betelgeuse
Sirius B
Spica
Sun
Vega
Answers: 2
Chemistry, 22.06.2019 08:00, wizz4865
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
Chemistry, 22.06.2019 12:00, winterblanco
What is the lowest number energy level where a d sublevel is found
Answers: 1
Chemistry, 22.06.2019 16:50, TrueKing184
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
Which of the stars shown, other than the Sun, would be good candidates for finding an Earth-like pla...
Mathematics, 16.01.2020 06:31
Chemistry, 16.01.2020 06:31
Physics, 16.01.2020 06:31
History, 16.01.2020 06:31
Mathematics, 16.01.2020 06:31
Mathematics, 16.01.2020 06:31
Mathematics, 16.01.2020 06:31
Mathematics, 16.01.2020 06:31