If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds? <span>
A. one-fourth</span>
Osmosis is the movement of water and is always the movement in the membrane. Diffusion does not need a membrane to make molecules and Diffusion is the movement of molecules.
hoped this helped, good luck
Answer:
1 mile = 1,609 meters
3.02E6 mi^2 x (1609^2m^2/mi^2) = 7.818E12 m^2
1 in= 2.54 cm => 2 in = 5.08cm = .0508m
7.818E12 m^2 x .0508m = 3.97E11 m^3
1 cubic meter = 1,000,000 cubic centimeters
3.97E11 m^3 x (1,000,000 cm^3 / m^3) = 3.97E17 cm^3
1000 cm^3 = 1L
3.97E17 cm^3 x (1L / 1000cm^3) = 3.97E14 L
or 3.97 x 10^14 L
convert to grams since 1L is 1000g
(3.97x10^14) x1000g which is 3.974x10^ 17g which is the final ans
Explanation:
Answer:
2MnO2 (s)
Explanation:
3KCN(aq) + 2KMnO4(aq) + 1H2O(l) → 3KCNO(aq) + 2MnO2(s) + 2KOH(aq)
Reactants:
K: 5
C: 3
N: 3
Mn: 2
O: 9
H: 2
Products:
K: 5
C: 3
N: 3
Mn: 2
O: 9
H: 2
