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Otrada [13]
3 years ago
6

A match has about 21 milligrams of red phosphorus coating the tip. How many atoms of phosphorus is this?

Chemistry
1 answer:
MAXImum [283]3 years ago
3 0

Answer:

4.083 * 10^20 atoms.

Explanation:

One Mole of phosphorus  contains 6.022 * 10^23 atoms (Avogadros number)'

Since 1 mole of Phosphorus  has a mass of  30.974 grams, 21 milligrams has

6.022 * 10^23  * 0.021 / 30.974

= 0.004083 * 10^23

= 4.083 * 10^20

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what is molarity of a sodium hydroxide solution made by combining 2.0 L of 0.60 M NaOH with 495 mL of 3.0 M NaOH? Assume the vol
hammer [34]

Answer:

Molarity of the sodium hydroxide solution is 1.443 M/L

Explanation:

Given;

0.60 M concentration of NaOH contains 2.0 L

3.0 M concentration of NaOH contains 495 mL

Molarity is given as concentration of the solute per liters of the solvent.

If the volumes of the two solutions are additive, then;

the total volume of NaOH = 2 L + 0.495 L = 2.495 L

the total concentration of NaOH = 0.6 M + 3.0 M = 3.6 M

Molarity of NaOH solution = 3.6 / 2.495

Molarity of NaOH solution = 1.443 M/L

Therefore, molarity of the sodium hydroxide solution is 1.443 M/L

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2 years ago
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3 years ago
1. Related to the number of particles in a gram of
Romashka-Z-Leto [24]

Answer:

Avogadro's number or Avogardro’s constant

Explanation:

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6 0
1 year ago
Which quantity is constant when working with boyles, charles, and gay lussacs law?
oee [108]

boyles law states that the volumes of a gas will decrease as pressure increases if the temperature remains constant.

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7 0
3 years ago
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Answer:

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6 0
3 years ago
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