ANSWER ALL PLEASE The yellow molecules (Y 3 ) react with the blue molecules (B 2

Question

ANSWER ALL PLEASE

The yellow molecules (Y3) react with the blue molecules (B2) to form molecules of Y2B, as shown in the figure below. Each circle represents one mole of material, and the atomic masses of Y and B are 30.8 and 54.9, respectively.

(a) How many grams of Y3 are in the container?
g

(b) How many grams of B2 are in the container?
g

(c) How many moles of Y2B molecules can be produced?
mol

(d) How many grams of Y2B could be produced?
g

(e) How many moles of Y3 and B2 remain after complete reaction? (Note that at least one of the reactants must disappear.)

mol ?

mol ?

Explanation / Answer

(a)

number of moles of Y = 12

atomic mass = 30.8

mass of Y3 in the container = 12 x 30.8 = 369.6 g

mass of Y3 in the container = 369.6 g

(b)

mass of B2 = 6 x 54.9

mass of B2 in container = 329.4 g

(c)

4 Y3 +   3 B2    ----------------> 6 Y2B

4          3                                   6

4             3                                  ??

number of moles of Y2B produced = 6 mol

d)

mass of Y2B produced = 6 x 116.5 = 699 g

mass of Y2B produced = 699 g

e)

Y3 remaining = 0 mol

B2 remaining = 0 mol

both are completely reacts.

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