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ratelena [41]
2 years ago
9

Which equation represents sublimation? 2Al+3I=2AlI HgCl=HgCl

Chemistry
1 answer:
AlexFokin [52]2 years ago
4 0
I guess it is the second one but you missed the state symbols.
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what is an empirical formulaWhat is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)?
Margarita [4]

Answer:

Percentage composition = 14.583%

Explanation:

In chemistry, the emprical formular of a compound is the simplest formular a compound can have. It shows the simplest ratio in which the elements are combined in the compound.

Percentage composition by mass of Nitrogen

Nitrogen = 14g/mol

In one mole of the compound;

Mass of Nitrogen = 1 mol * 14g/mol = 14g

Mass of compound = 1 mol * 96.0 g/mol = 96

Percentage composition of Nitrogen = (Mass of Nitrogen /  Mass of compound) * 100

percentage composition = 14/96   * 100

Percentage composition = 0.14583 * 100

Percentage composition = 14.583%

3 0
2 years ago
What is a serial dilution?
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A serial dilution is the stepwise dilution of a substance in solution. Usually the dilution factor at each step is constant, resulting in a geometric progression of the concentration in a logarithmic fashion.

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A piston in a heat engine does 500 joules of work, and 1,400 joules of heat are added to the system. Determine the change in int
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The change is that the piston gets hotter? (Theres more heat in it)
8 0
2 years ago
sample of substance X has a mass of 326.0 g releases 4325.8 cal when it freezes at its freezing point. If substance X has a mola
ELEN [110]
Number of moles ( substance x ):

1 mole --------- 58.45 g/mol
? mole --------- 326.0 g

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hf = Cal / moles

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hope this helps!
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3 years ago
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process by which one separates compounds from one another by passing a mixture through column that retains some compounds longer than others.

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