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amm1812
3 years ago
8

After three half-lives, what fraction of a radioactive sample remains? 1/8 1/3 1/2 1/6

Chemistry
2 answers:
Scilla [17]3 years ago
6 0
1/8 got it from Yahoo answers and the answer was highlighted with 4 likes.... so most likely thats it
marysya [2.9K]3 years ago
6 0

1/8 got it that guy in my house

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Name the phase change in each of these events: (c) Wet clothes dry on a summer day
8090 [49]

The phase change occurs during evaporation. On a hot day, wet clothing is drying. A liquid becomes a gas when it evaporations.

During the process of evaporation, a liquid transforms into a gaseous phase that is not saturated with the evaporating substance. The term "vaporization of a liquid" refers to this process. Clothes start to dry as water vapor escapes from the fabric's surface.

<h3>What is evaporation?</h3>

A liquid turns into a gas through the process of evaporation. Raindrops that "vanish" on a hot day or damp clothing that dries in the sun are good examples of the phenomena. In these instances, the liquid water is evaporating into a gas known as water vapor rather than really dissipating. Global evaporation takes place.

Learn more about evaporation: brainly.com/question/5019199

#SPJ4

5 0
1 year ago
How much volume will 8.8 moles of gas fill at 0.12 atm at 56*C
Neporo4naja [7]

Answer:

2000 L

General Formulas and Concepts:

<u>Atomic Structure</u>

  • Moles
  • Temperature Conversion: K = °C + 273.15

<u>Gas Laws</u>

Ideal Gas Law: PV = nRT

  • P is pressure
  • V is volume (in L)
  • n is number of moles
  • R is gas constant
  • T is temperature (in K)

Explanation:

<u>Step 1: Define</u>

[Given] 8.8 moles gas

[Given] 0.12 atm

[Given] 56 °C = 329.15 K

<u>Step 2: Solve for </u><em><u>V</u></em>

  1. Substitute in variables [Ideal Gas Law Formula]:                                           \displaystyle (0.12 \ atm)V = (8.8 \ mol)(0.0821 \ \frac{L \cdot atm}{mol \cdot K})(329.15 \ K)
  2. Isolate <em>V</em>:                                                                                                           \displaystyle V = \frac{(8.8 \ mol)(0.0821 \ \frac{L \cdot atm}{mol \cdot K})(329.15 \ K)}{(0.12 \ atm)}
  3. Multiply/Divide [Cancel out units]:                                                                   \displaystyle V = 1981.7 \ L

<u>Step 3: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

1981.7 L ≈ 2000 L

3 0
3 years ago
Is a purmice a mineral or rock
Over [174]

Answer:

rock

Explanation:

3 0
3 years ago
Air contains nitrogen, oxygen, argon, and trace gases. if the partial pressure of nitrogen is 587 mmhg, oxygen is 158 mmhg, argo
ivanzaharov [21]
According to Dalton's Law of Partial pressure, the pressure exerted by a mixture of non-reacting gases is equal to the sum of their partial pressure.

Mathematically,

                                 Total Pressure = P₍₁₎ + P₍₂₎ + P₍₃₎ + .......    ------(1)
Data given:

                Partial pressure of Nitrogen = P₍₁₎ = 587 mmHg

                Partial pressure of Oxygen  = P₍₂₎ = 158 mmHg

                Partial pressure of Argon     = P₍₃₎ = 7.00 mmHg

Putting these values in eq 1.

                                 Total Pressure = 587 mmHg + 158 mmHg + 7 mmHg

                                 Total Pressure = 752 mmHg 
8 0
3 years ago
Could anyone give me the answer to this plz 20 points
svetoff [14.1K]
13 - Periodic table
14 - Dimitri mandeleev
15 - groups


Mark me brainiest pls it right answer
6 0
4 years ago
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