Answer:
151.4863 years
Explanation:
Half life, t1/2 = 100 years
Initial concentration,[A]o = 100%
Final concentration, [A] = 35% (after 65% have been decayed)
Time = ?
Half life for a first Order reaction is given as;
t1/2 = ln (2) / k
k = ln(2) / 100
k = 0.00693y-1
The integral rate law for first order reactions is given as;
ln[A] = ln[A]o − kt
kt = ln[A]o - ln[A]
t = ( ln[A]o - ln[A]) / k
t = [ln(100) - ln(35)] /0.00693
t = 1.0498 / 0.00693
t = 151.4863 years
Answer:
Hydrogen Peroxide is known as a dental “debriding agent”. But when used on skin for minor wounds it will foam and turn surrounding tissue white. ... H2O2 decomposes easily to make water (H2O) and a single free oxygen atom which is looking for something to react with - like your skin.
Explanation:
Blood is pumped throughout the body by your heart. Your heart is the main organ responsible for blood circulation.
Answer: C- 1.65 moles
Explanation:
HCl = 1 + 35.45 = 36.45 g/mol
The titration reaction is written as follows:
Ba(OH)2 + 2HNO3 = Ba(NO3)2 + 2H2O
The calculations are as done as follows:
0.100 mol HNO3 / L (.03445 L solution ) = 0.003445 mol HNO3
0.003445 mol HNO3 ( 1 mol Ba(OH)2 / 2 mol HNO3 ) = 0.001723 mol Ba(OH)2
0.001723 mol / 0.025 L = 0.07 M Ba(OH)2
