:at a certain temperature this reaction follows first-order kinetics with a rate constant of 0.00771 nh, oh(aq) - nh, (aq) +h,0(aq) suppose a vessel contains nh oh at a concentration of 1.42 m. calculate how long it takes for the concentration of nh oh to decrease to 17.0% of its initial value. you may assume no other reaction is important round your answer to 2 significant digits. x 5 ?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

Light waves travel than sound waves.