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dusya [7]
2 years ago
6

Polonium crystallizes in a simple cubic unit cell with an edge length of 3.36 Å.

Chemistry
1 answer:
Diano4ka-milaya [45]2 years ago
8 0

a. The unit cell is the smallest group of atom which have overall symmetry of a crystal, and from which is the entire letters can be buled built up by repetition in 3 dimensions.

b. The volume(v) of the unit cell is equal to the cell edge length (a)cubed.

c. density of polonium is 9.32g/cm3.

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Q3. A bridge is built without expansion gaps.

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3 years ago
What is the density of a liquid if 12.5 ml of the liquid has a density of 9.80 g?
blagie [28]

Answer:

The answer is

<h2>0.784 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

<h3>density =  \frac{mass}{volume}</h3>

From the question

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The density is

density =  \frac{9.8}{12.5}

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3 0
3 years ago
Hydrogen and nitrogen react to form ammonia according to the reaction, 3 H2 + N2 â&gt; 2 NH3. If 4.0 moles of H2 with 2.0 moles
Debora [2.8K]

Answer:

d) 2.7 mol

Explanation:

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limit reagent is H2:

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⇒ moles NH3 = (4.0 moles H2)×(2 mol NH3/3mol H2)

⇒ moles NH3 = 2.666 mol

⇒ moles NH3 ≅ 2.7 mol

5 0
3 years ago
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