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DedPeter [7]
3 years ago
5

C. Another radioisotope of americium exists which has an atomic mass of 242.

Chemistry
1 answer:
ollegr [7]3 years ago
7 0

Answer:

1 g  

Explanation:

The half-life of Am-242 (16 h) is the time it takes for half of it to disappear.

We can make a table of the mass left after each half-life.

\begin{array}{cccc}\textbf{No. of} & & \textbf{Percent} & \textbf{Mass}\\\textbf{Half-lives} & \textbf{Time/h} & \textbf{Remaining} & \textbf{Remaining/g}\\0& 0 & 100 & 8\\1 & 16 &50 & 4\\2 & 32 & 25 & 2\\3 & 48 & 12.5 & 1\\4 & 64 & 6.25 & 0.5\\\end{array}

The mass remaining after 48 h  is 1 g.

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To determine the concentration of one solution which is specifically basic or acidic solution through taking advantage on its points of equivalence, titration analysis is done.

Let us determine the reaction for the titration below:

2NaOH +2H2SO4 = Na2SO4 +2H2O

 

So,

0.0665 mol NaOH (2 mol H2SO4/ 2mol NaOH) / .025 L solution 

= 2.62 M H2SO4


The answer is the fourth option: 

<span>2.62 M</span>
7 0
3 years ago
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Answer:

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2 years ago
Is carbon dioxide a reactant
Harman [31]

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3 years ago
A solution of hydrocloric acid has a molarity of 2.25 M HCl. If a reaction requires 5.80 g of HCI, what
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Answer:

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Explanation:

From the question given, we obtained the following data:

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Number of mole of HCl =?

Number of mole = Mass /Molar Mass

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Now, we can obtain the volume required as follows:

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3 years ago
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zhuklara [117]

Answer:

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i hope this was useful

4 0
2 years ago
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