What is the half life of an isotope that is 75% decayed after 16 days?

What solid is brown and red, crumbly and weak in the periodic table (probably a metal)

A 1-l soda bottle contains dissolved carbon dioxide gas. which bottle would have the highest concentration of dissolved gas?

Which of the following elements listed is the least metallic

What is the h + concentration in a urine sample that has a ph of 6?

What is the percent yield if the actual yield from this reaction is 343 g?

The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm? A. 7.7 degrees B. 16.6 degrees C. 6.

g write net ionic equations for the reactions of h2po4 - an amphiprotic ion with aqueous solutions of hcl koh

Eagles use sharp talons to grab fish from the water. What characteristic of life is this most directly an example of?

Which of the following statements about rock and mineral resources is true

What are similarities between opinion based research and observation based research