In the beta decay reaction: , determine the times required for the number of original atoms to be reduced by 25, 50 and 75%, given the half-life of Pb214 is 26.8 minutes. In the beta decal reaction,  is the neutrino that results from the reaction.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Identify and describe the three ways that mutations affect organisms.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt