Calculate the concentration of solution (in%) obtained by adding of 200 g of water to 400 g of 30% solution: A) 20
B) 23
C) 25
D) 10
E) 15
( i found A but i doubt it)

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

Calculate the change in entropy if br2(l) is converted to br2(g). s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

In all living cells dna controls cellular activities by