The nuclide ⁹5Nb decays by beta emission with a half-life of 35.0 days. The mass of a ⁹5Nb atom is 94.907 u. (a) How many grams of ⁹5Nb are in a sample that has a decay rate from that nuclide of 321 s¯¹? g (b) After 114 days, how many grams of 95Nb remain?

Solve correctly please. All three parts need. (Gpt/Ai wrong answer not allowed)

A 35 cm³ sample of 0.15 M CH3COOH (Ka of this solution? Select one: a. 3.97 b. 7.00 c. 11.36 d. 5.53 e. 4.75* Select one: = According to the Bronsted-Lowry definition, an acid is a substance which donates a a. hydride ion. b. hydrogen ion. c. hydrogen molecule. d. hydroxide ion. e. hydrogen atom. * 1.8 x 10-5) is titrated with 30 cm³ of 0.15 M NaOH. What is the pH

e courses.hayden-n stry 1302A/B Discovering... OWL : CHEM 1302B 004 FW20: Chapter 3 Ten mL of a stock solution of the bromocresol green indicator is mixed with 10 mL of NaOH. Which of the following is true? Select one: a. The concentration of the indicator increases. b. The concentration of the indicator decreases. c. The concentration of the indicator remains the same. d. None of the above. For this experiment, what will be typed into the MicroLab unit instead of the concentration of the indicator? Select one: a. The concentration of NaOH. b. The concentration of hydronium [H3O`]. c. The concentration of HIn. d. The concentration of In.

can search the web by typing the chemical name followed by SDS) b) what is the best practice to follow if a small amount of sulfuric acid (1M) comes in contact with your bare hand? 2. Write a one or two sentence statement of what the purpose of this lab is. 3. To prepare for laboratory: For each of the eight unknowns solutions that you will identify in lab (see above or table below), identify the chemical color and the pH category (acidic, neutral, or basic) that you expect to find. Prepare a table to summarize your initial expectations for the color and pH tests. A. Introduction- A Fictitious Scenario ne Chem-Police, a division of the Office of Homeland Security created in re-

Simulation illustrates how buffers work.?What type of buffer is presented simulation? Acidic or basic? What is the role of the buffer solution?