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timama [110]
3 years ago
7

Copper, a metal known since ancient times, exists in two stable isotopic forms, 6329Cu (69.09%) and 6529Cu (30.91%). Their atomi

c masses are 62.93 amu and 64.9278 amu respectively. Calculate the average atomic mass of copper.
Chemistry
1 answer:
Svetradugi [14.3K]3 years ago
7 0

Answer:

Wt. Avg. Atomic Weight => 63.35457 amu

Explanation:

Given              Isotopic             %Abundance     fractional          Wt Avg

                  At. Mass (amu)                                  abundance      contribution                    

Cu-63              62.93                      69.09              0.6909            43.4783

Cu-65              64.9278                  20.0668        0.200668        20.0668

Wt Average of all isotopes = ∑Wt Avg Contributions

=  43.4783 amu + 20.0668 amu = 63.35457 amu

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Answer:

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Explanation:

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3 years ago
All of the following are forms of acid precipitation EXCEPT ________.
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Answer:

The correct option is;

c. The scientist can make and record observations

Explanation:

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7 0
3 years ago
Calculate the molar concentration of the Cl⁻ ions in 0.65 M CaCl2(aq), assuming that the dissolved substance dissociates complet
alexandr1967 [171]
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5 0
3 years ago
Help please chemistry will give brainliest
Jlenok [28]

Answer:

Explanation:

The Ideal Gas Law states that PV=nRT.

Rearrange that into P/n=RT/V.

In this case, the cylinder is rigid so the volume, V, does not change.

Temperature does not change either.

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6 0
3 years ago
Read 2 more answers
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