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Vanyuwa [196]
3 years ago
5

The diameter of a helium atom is about 1 3 102 pm. Suppose that we could line up helium atoms side by side in contact with one a

nother. Approximately how many atoms would it take to make the distance from end to end 1 cm
Chemistry
1 answer:
Tasya [4]3 years ago
7 0

Answer:

1 × 10⁸ He atoms

Explanation:

Step 1: Given data

  • Diameter of a helium atom (d): 1 × 10² pm
  • Total distance to be covered (D): 1 cm

Step 2: Convert "d" to meters

We will use the conversion factor 1 m = 10¹² pm.

1 × 10² pm × (1 m / 10¹² pm) = 1 × 10⁻¹⁰ m

Step 3: Convert "D" to meters

We will use the conversion factor 1 m = 100 cm.

1 cm × (1 m / 100 cm) = 0.01 m

Step 4: Calculate the number of atoms of He required

We will use the following expression.

D/d = 0.01 m / 1 × 10⁻¹⁰ m = 1 × 10⁸

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The equation for the reaction, BaCl2(aq) + K2CrO4(aq) → BaCrO4(s) + KCl(aq), can be written as an ionic equation. In the ionic e
Arturiano [62]

Answer:

The Cl⁻ and K⁺ are spectator ions.

Explanation:

Balanced Chemical equation:

BaCl₂(aq) + K₂CrO₄(aq)   →   BaCrO₄(s) + 2KCl (aq)

Ionic equation:

Ba²⁺(aq) + 2Cl⁻(aq) + 2K⁺(aq) + CrO₄²⁻(aq) → BaCrO₄(s) + 2k⁺(aq) + 2Cl⁻ (aq)

Net ionic equation:

Ba²⁺(aq)  + CrO₄²⁻(aq)  →  BaCrO₄(s)

The Cl⁻ and K⁺ are spectator ions that's why these are not written in net ionic equation. The BaCrO₄ can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

8 0
3 years ago
2,2-dichlorohexane 4 , 4 Give two reason, explain why 2,2-dichloro-3-methylbutane has structure isomer of 2, 2 dichloropentane.
matrenka [14]

Answer:explain why 2,2-dichloro-3-methylbutane has structure isomer of 2, 2 dichloropentane. ​Although there are 12 hydrogen atoms in the molecule, there only 4 possible 1H chemical environments for the hydrogen atoms in 2-methylbutane molecule.

Explanation:

4 0
3 years ago
Which of the following has more calories: table sugar or aspartame? Explain.
Drupady [299]

Answer: aspartame has more

Explanation: Aspartame contains 4 calories per gram (g), similar to sugar. It is, however, around 200 times sweeter than sugar. This means that only a tiny amount of aspartame is necessary to sweeten foods and drinks. so answer is aspartame

8 0
3 years ago
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A gas has a volume of 590 mL at a temperature of –55.0°C. What volume will the gas occupy at 30.0°C? Show your work.
Mashutka [201]
Step 1: Convert the temperatures to K
-55 + 273 = 218 K = T1
30 + 273 = 303 K = T2

Step 2: Use the formula V1/T1 = V2/T2
590/218 = V2/303
V2 = 303 * (590/218) = 820.02 mL is the new Volume
8 0
3 years ago
What are the three categories of atomic solids? check all that apply.
blsea [12.9K]

the three categories of atomic solids are as follows;

E. nonbonding atomic solids.

A. network covalent.

What are atomic solids?

Atoms of an element must be bonded to other atoms of the same atom type in order for a substance to be considered an atomic solid.

Diamond, silicon crystals, and pure metals are a few examples of atomic solids. Network solids are atomic solids in which the atoms are covalently connected to one another.

SiO2, often known as quartz, is another example of a network solid and is an extremely hard substance, scoring 7.5 out of 10.

To learn more about Atomic Solids

brainly.com/question/17061172

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7 0
2 years ago
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