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

The buoyant force acting on a submerged object equals the weight of the fluid displaced by the object. What is the weight of the water displaced by a block of iron with the dimensions of 3.00 cm x 3.00 cm x 3.00 cm? The iron has a mass of 213 g.

Which headings should be used to complete this table? R-OHR -o-R R-C- R O= R -C-H R -C-OH R-C-0-R' 0 Beverages Fuel Anesthetic Weak acid Organic solvent Organic solvent Preservative Adhesive Vinegar Fats Fragrances compound (top row);

How many grams of dextrose are contained in a pint of d5ns?

What happens when an electric current is passed through the gas or vapor of an element?

Calculate the pH of a solution with a [H3O+] concentration of 3.0 x 10-9 M.

Find the specific heat of an unknown material with an initial temperature of 20°C, when 5000 Joules are applied to a 50 gram sample and the final temperature is 70°C

Which process most likely takes place when the kinetic energy of molecules overcomes the intermolecular forces? boiling condensation freezing solidification

Which organelle of a prokaryotic cell contains genetic information? cell membrane nucleoid nucleus ribosomes

What mineral is most likely used to make the MP3 player?

What is the oxidation number of chromium in K2Cr2O7? (1) + 12 (3) + 3 (2) + 2 (4) + 6