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Shkiper50 [21]
4 years ago
15

Predict the following chemical formula for a compound between lithium and oxygen

Chemistry
2 answers:
zhuklara [117]4 years ago
3 0
Li2O.. Because Li is +1 and O2 is -2
hram777 [196]4 years ago
3 0

Explanation:

Atomic number of lithium is 3 with electronic distribution 2, 1. So, to attain stability lithium loses 1 electron and becomes Li^{+} ion.

Atomic number of oxygen is 8 with electronic distribution 2, 6. So, to attain stability oxygen needs to gain two electrons and thus becomes O^{2-} ion.

Therefore, a neutral molecule will have charges balanced between the combining atoms.

Hence, when lithium and oxygen atoms combine together then they will form compound Li_{2}O.

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Answer:

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For the first order process: AB The half-life of A is 62.1 seconds. If a sample of A initially has 250.0 g, what mass (in g) of
Molodets [167]

<u>Answer:</u> The mass of sample A after given time is 99.05 g.

<u>Explanation:</u>

All the radioactive reactions follows first order kinetics.

The equation used to calculate half life for first order kinetics:

t_{1/2}=\frac{0.693}{k}

We are given:

t_{1/2}=62.1s

Putting values in above equation, we get:

k=\frac{0.693}{62.1}=0.011s^{-1}

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

k = rate constant = 0.011s^{-1}

t = time taken for decay process = 84.2 s

[A_o] = initial amount of the reactant = 250 g

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Putting values in above equation, we get:

0.011s^{-1}=\frac{2.303}{84.2s}\log\frac{250}{[A]}

[A]=99.05g

Hence, the mass of sample A after given time is 99.05 g.

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3 years ago
What is reason of the formation of tectonic plates?​
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Answer:

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