Answer:
im sorry i dont know this question but look up qulzlet that might help
Explanation:
Heat
gained or loss in a system can be calculated by multiplying the given mass to the
specific heat capacity of the substance and the temperature difference. It is
expressed as follows:<span>
Heat = mC(T2-T1)
When two objects are in contact,
it should be that the heat lost is equal to what is gained by the other. So, the heat released by the lead is equal to the heat that is absorbed by the water.
</span>Heat = mC(T2-T1) = 50.0 mL (1.00 g/mL) (4.18 J/g °C) (20 °C - 18 °C) = 418 J<span>
</span>
Answer is: 1/16 of the original mass remains unchanged after 10 years
Take 100 atoms:
After first half-life (2.5 years): 50% · 100 ÷ 100% = 50 or 1/2.
After second half-life (5 years): 0.5 · 50 = 25 or 1/4.
After third half-life (7.5 years): 0.5 · 25 = 12.5 or 1/8.
After fourth half-life (10 years): 0.5 · 12.5 = 6.25 or 1/16.
6.25 ÷ 100 · 100% = 6.25% or 1/16.
The overall charge on this atom is zero if the lithium atom has three, protons, three neutrons, and three electrons.
<h3>What is an atom?</h3>
The smallest tiny particles of matter which can't be divided further is called atoms.
The lithium atom is always electrically neutral, ie, it has no charge. A proton has a unit positive charge while an electron has a unit negative charge, an atom has an equal number of protons and neutrons and thus it is electrically neutral.
Hence, the overall charge on this atom is zero if the lithium atom has three, protons, three neutrons, and three electrons.
Learn more about the atom here:
brainly.com/question/1566330
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