3 years ago

Jaime is learning how elements are placed in the periodic table. He must find an element similar

Chemistry

1 answer:

Inessa05 [86]3 years ago

4 0

Answer:

magnesium (Mg)

Explanation:

Both are in group 2 and because of that share the same chemical properties.

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defon

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1. Calculate how many moles of glycine are in a 130.0-g sample of glycine.2. Calculate the percent nitrogen by mass in glycine.

Alexxx [7]

Answer:

$n=1.732mol$

$\% N=18.7\%$

Explanation:

Hello!

In this case, since the molecular formula of glycine is C₂H₅NO₂, we realize that the molar mass is 75.07 g/mol; thus, the moles in 130.0 g of glycine are:

$n=130.0g*\frac{1mol}{75.07 g}\\\\ n=1.732mol$

Furthermore, we can notice 75.07 grams of glycine contains 14.01 grams of nitrogen; thus, the percent nitrogen turns out:

$\% N=\frac{14.01}{75.07}*100\% \\\\\% N=18.7\%$

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You are unsure of the volume of a substance, but you know that it has a density of 4 g/ml and a mass of 16 grams. What is its vo

avanturin [10]

Answer:

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Explanation:

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Plug in the density and mass to solve for v:

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