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elixir [45]
3 years ago
8

An ice cube melts and then the liquid water evaporates. Which statement is true about the mass of water that goes through each c

hange of state?
Chemistry
1 answer:
s344n2d4d5 [400]3 years ago
5 0

Answer:

it changes.

Explanation:

when in solid form it has an amount of mass. but when evaporated, water is pretty much massless.

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Find the mass of 5.82 mol of MgCl2. Round to the nearest tenth.
Oksana_A [137]

Answer:

554.13 grams

Explanation:

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A sample contains 25% parent isotope and 75% daughter isotopes. If the half-life of the parent isotope is 72 years, how old is t
alisha [4.7K]

The radioactive decay obeys first order kinetics

the rate law expression for radioactive decay is

ln\frac{[A_{0}]}{[A_{t}]}=kt

Where

A0 = initial concentration

At = concentration after time "t"

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k = rate constant

For first order reaction the relation between rate constant and half life is:

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

Let us calculate k

k = 0.693 / 72 = 0.009625 years⁻¹

Given

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time = 144 years

So after 144 years the sample contains 25% parent isotope and 75% daughter isotopes**

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3 years ago
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ser-zykov [4K]

The particles cannot move around at all. The particles are, however, still in motion.

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3 years ago
Read the article and answer the 6 questions in it.
Sliva [168]

Answer:

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27. Based on Reference Table S, which of the
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Answer:

This question is incomplete but the correct option is B

Explanation:

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Ionization energy increases from left to right across the period because it's easier to remove a single electron (valence electron) from the outermost shell than to remove two electrons from the same shell; thus the more the valence electrons (in a shell), the higher the ionization energy. Thus, bromine (Br) and tin (Sn) have high ionization energies because they have more number of electrons in there outermost shell.

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5 0
3 years ago
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