Chemistry, 11.07.2019 10:30 GrinReaperXll
Tiffany loves babysitting her cousin hayden, who she thinks is the most entertaining one year old in the world. she is watching him one afternoon, when she decides to watch tv. unfortunately, she has trouble finding anything she wants to watch. a strange thing happens though: tiffany observes a change in hayden's behavior every time she changes the channel. because of this, tiffany decides to conduct an experiment to see if she can identify a pattern to his behavior. which of the following options best describes the first step of the scientific method as it occurs in this passage? tiffany concludes that hayden really likes "dora the explorer." tiffany has trouble finding anything she wants to watch on tv. tiffany observes a change in hayden's behavior every time she changes the channel.
Answers: 1
Chemistry, 22.06.2019 04:00
You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present
Answers: 1
Chemistry, 22.06.2019 04:30
Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole
Answers: 1
Chemistry, 22.06.2019 16:50
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
Chemistry, 22.06.2019 22:30
Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 sâ1. part a part complete what is the half-life for this reaction?
Answers: 3
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