John is a quarterback. this year, he completed 3 5 0 350 passes, which is 7 0 % 70% of all the passes he's attempted this year. how many passes has john attempted this year?

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?