What is 206pb and 208pb?

F2 (g) + 2Br (aq) = Br (t) + F (aq) which species is redused? a) F b) Br c) F2 d) Br2

What structure holds the sister chromatids to the spindle fibers? a. kinetochore b. chromatin c. mpf d. cyclin e. centromere

What mass of aluminum will be deposited on the cathode if an electric current of 0.15 a is run for 4 5s when a solution of al (no3) 3 is subjected to electrolysis?

A 1 mol sample of gas has a temperature of 225K, a volume of 3.3L, and a pressure of 500 torr. What would the temperature be if the amount of gas remains constant while pressure dropped to 210 torr, and the volume dropped to 2.75L?

Which particles make up the nucleus of an atom? A. protons and electrons B. neutrons and electrons C. protons only D. protons and neutrons E. neutrons only

The four elements comprising over 90 of living matter are

Consider the gas-phase reaction, n2 (g) + 3 h2 (g) 2 nh3 (g), for which kp = 43 at 400 k. if the mixture is analyzed and found to contain 2.0 bar of n2, 2.0 bar of h2 and 27.0 bar of nh3, describe the situation:

How many moles of ions are in 285 ml of 0.0150 m mgcl2?

Given: logK=nE∘0.0592 What is the value K for this redox reaction? Zn2 + (aq) + 2 Cl - (aq) → Zn (s) + Cl2 ( g. Ecell = - 2.12 V

What is 350 kelvin on the Celsius scale of temperature?