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GREYUIT [131]
3 years ago
10

PLEASE HELP!!! What is the mass of one lead atom in amu?

Chemistry
2 answers:
alexandr402 [8]3 years ago
7 0

Answer: 207.2

Explanation:

In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass. This is approximately 1.67377 x 10 -27 kilogram (kg), or 1.67377 x 10 -24 gram (g). The mass of an atom in AMU is roughly equal to the sum of the number of protons and neutrons in the nucleus.

scoundrel [369]3 years ago
3 0

Answer:207.2

Percent composition by element

Element Symbol Atomic Mass

Lead Pb 207.2

Explanation: googled it

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\boxed {\boxed {\sf 4038.48 \ Joules}}

Explanation:

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m= 450.0 \ g \\c= 1.264 \ J/g \textdegree C\\\Delta T= 7.1 \ \textdegree C

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q= (450.0 \ g)(1.264 \ J/g \textdegree C)(7.1 \ \textdegree C)

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