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anygoal [31]
3 years ago
9

Please help. Where it it stored in?

Chemistry
1 answer:
kakasveta [241]3 years ago
8 0
I would say heat, but I might be wrong

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Bridges and automobiles are either painted or coated with zinc. Why is it not electroplated?
Reika [66]

Answer:

To prevent rusting.

6 0
3 years ago
Be sure to answer all parts. The thermal decomposition of phosphine (PH3) into phosphorus and molecular hydrogen is a first-orde
amm1812

The given question is incomplete. The complete question is :

The thermal decomposition of phosphine (PH3) into phosphorus and molecular hydrogen is a first-order reaction: 4PH_3(g)\rightarrow P_4(g)+6H_2(g) The half-life of the reaction is 35.0 s at 680°C. Calculate the first order rate constant.

Answer: a) The first order rate constant is 0.0198s^{-1}

b) The time after which 95% reactions gets completed is 151 seconds

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

a = let initial amount of the reactant

a - x = amount left after decay process  

a) for finding the rate constant

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}

k=\frac{0.693}{35.0s}=0.0198s^{-1}

The first order rate constant is 0.0198s^{-1}

b) for completion of 95 % of reaction

t=\frac{2.303}{k}\log\frac{100}{100-95}

t=\frac{2.303}{0.0198}\log\frac{100}{5}

t=151 s

The time after which 95% reactions gets completed is 151 seconds

5 0
3 years ago
Please choose the answer that describes the Scientific notation of 5,089,000
creativ13 [48]
This number in scientific notation is 5.089(10^6).
5 0
3 years ago
How many significant figures does the number 0.00650<br> have?
Gre4nikov [31]
There are three of them
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3 years ago
Read 2 more answers
35.67 g of NaNO3 is dissolved in water to make a 0.500 M solution. What is the volume of the solution in liters?
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Sorry but I have no idea
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3 years ago
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