How much of a 1.0 g polonium-214 sample remains after 818 microseconds? The half life of polonium -214 is 163.7 microseconds

0.3125g

Step-by-step explanation: 1.0 * 1/2= 0.5

0.5* 1/2= 0.25

0.25* 1/2= 0.125

0.125* 1/2= 0.625

0.625* 1/2= 0.3125g

0.0320g

Step-by-step explanation:

solving for M, and we are given Mo=1.00g, t=818 microseconds, t1/2=163.7 microseconds.

n=t/t1/2=818/163.7=4.97

M=Mo(1/2)n=1.00(1/2)4.97=0.0320g

there are 25 people coming to the party

step-by-step explanation:

the text says that there will be 22 children at this party, 1 teacher, and 2 parents. so if you add them all together (22+1+2) it will equal 25. (=25)

a reflection across the x axis and a 90 degree rotation left and right.