2 years ago

Which of the following single replacement reactions will take place?

Chemistry

1 answer:

Bess [88]2 years ago

7 0

Answer:

O Al + Mg(NO3)2 -->

Explanation:

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alina1380 [7]

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2 years ago

( BRAINLIEST) Which of these statements best describes an Alkali? *

Bad White [126]

Answer:

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Explanation:

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Kryger [21]

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2 years ago

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

ollegr [7]

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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