Radium-221 has a half-life of 30 s. how long will it take for 95% of a sample to decay

According to table f which substance is most soluble in water.

Water in contact with air is acidic, rather than neutral, dueto dissovled carbon dioxide. Water in equilibrium with theair contains 4.4 X 10 - 5% CO2. Theresulting carbonic acid, H2 CO3, gives thesolution a hydrogen ion concentration of 2.

What is 89,700,000,000 in scientific notation

Is 2h2 + Ag2---> 2HAg balanced

Some ICI is added to an empty flask. How do the reaction rates change as the system approaches equilibrium? A. Foward rate increases, reverse rate increases B. Fwd rate increases, reverse rate decreases C.

The Greek letter D stands for A. Mass of B. Rate of C. Change in D. Heat stored in

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals