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hichkok12 [17]
3 years ago
5

Identify the number of significant figures in each of these measurements of an object length: a. 76.48 cm b. 76.47 cm c. 76.59 c

m
Chemistry
1 answer:
ryzh [129]3 years ago
4 0

All of the measurements have 4

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Mg + 2AgNO3 -> 2Ag + Mg(NO3)2
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Answer:

Explanation:

We'll assume there is an excess of silver nitrate, so that all 12.0 moles of the magnesium (Mg) will react.

The balanced equation tells us we'll obtain 2 moles of Ag for every 1 mole of magnesium, for a molar ratio of 2/1.

Starting with 12.00 moles Mg, we would therefore hope to find twice that, or 24.00 moles of Ag.

To convert to grams, find the molar mass of Ag from the periodic table.

Ag has a molar mass of 107.9 (to 4 sig figs) grams/mole.

(24.00 moles)*(107.9 grams/mole) = 2590 grams (4 sig figs)

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3 years ago
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What is the percent yield for a reaction if we predicted the formation
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Answer:

18.1%

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2 years ago
Which element has the lowest first ionization energy? (F), (Li), (Fr), (Rb)?
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Answer:

Fr

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Calculate the vapor pressure in torr of a solution containng 24.5 g of glycerin (C3H8O3) in 135 mL water at 30.0* C; the vapor p
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