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Effectus [21]
3 years ago
6

The sink–float method is often used to identify the type of glass material found at crime scenes by determining its density. Sev

eral different types of glass of known density are placed into solutions of varying densities. Determine whether each glass piece will sink, float, or do neither when immersed in the given solution.
Chemistry
1 answer:
Roman55 [17]3 years ago
7 0
Suecagatathqnsu gsgehxhdbbssjjzkzhs
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2.5 piece of lithium is dropped into a 500 g sample of water at 22.1 C.ten temperature of the water increases to 23.5 C. How muc
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Answer:

2.6 kJ  

Explanation:

The formula for the amount of heat (q) absorbed by the water is

q = mCΔT

1. Calculate ΔT

ΔT = 23.5 °C - 22.1 °C = 1.4 °C

2. Calculate q

q₂ = mCΔT = 500 g × 4.184 J·°C⁻¹g⁻¹ × 1.4 °C = 2900 J = 2.9 kJ

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Give the ground-state electron configuration for silicon (SiSi) using noble-gas shorthand. Express your answer in condensed form
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Answer:

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Explanation:

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Using noble gas shorthand, the electronic configuration is reduced to;

[Ne] 3s² 3p². Ne s the nearest noble gas to silicon, Ne contains 8 electrons, this means there's still 4 more electrons to fill. The s orrbital can only hold 2, hence the reaing two is transferred to the p orbital.

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Difference between element and radical​
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Explanation:

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