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Elena-2011 [213]
3 years ago
14

Name and describe 3 ways to protect the worlds biodiversity

Chemistry
1 answer:
Rainbow [258]3 years ago
4 0
<span>1.Captive breeding: people can capture two organisms from the same species and wait for them to breed. 2.Laws and treaties: the government can make a law how many organisms to kill or not kill an organism in that area. 3.Habitat preservation: people can preserve a area for animals to live and breed. Hope this help :D</span>
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You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physics. Y
lbvjy [14]

Answer: 2.58 days

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = ?

t = age of sample  = 6 days

a = initial amount of the reactant  =  1 g

a - x = amount left after decay process   = 0.2 g

a) to find the rate constant

6=\frac{2.303}{k}\log\frac{1.0}{0.2}

k=\frac{2.303}{6}\log\frac{1.0}{0.2}

k=0.268days^{-1}

b) for completion of half life:  

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

t_{\frac{1}{2}}=\frac{0.693}{0.268}=2.58days

The half life is 2.58 days

3 0
3 years ago
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