1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mote1985 [20]
3 years ago
13

If carbon-15 has a half-life of 2.5 seconds, % of the sample would still be

Chemistry
1 answer:
kramer3 years ago
8 0

Answer:

After 5 second 25% C-15 will remain.

Explanation:

Given data:

Half life of C-15 = 2.5 sec

Original amount = 100%

Sample remain after 5 sec = ?

Solution:

Number of half lives = T elapsed / half life

Number of half lives = 5 sec / 2.5 sec

Number of half lives = 2

At time zero = 100%

At first half life = 100%/2 = 50%

At second half life = 50%/2 = 25%

Thus after 5 second 25% C-15 will remain.

You might be interested in
What is the main function of the cell membrane in an animal cell?
Paladinen [302]

Answer:

A cell's plasma membrane, also known as the cell membrane, provides protection. It also maintains a constant atmosphere within the cell, and the membrane serves a variety of purposes. The first is to transport nutrients into the cell, and the second is to transport toxic compounds out

Explanation:

5 0
2 years ago
Read 2 more answers
Which element will be more reactive - Mg (magnesium) OR Se (Selenium)? *
anygoal [31]

Answer:

magnesium

Explanation:

magnesium is in Group 2, in the periodic table. this means that it has 2 valence electrons. the less valence electrons an element or atom has, the more reactive. Selenium has 6 valence electrons. as a result, Mg is more reactive

5 0
3 years ago
A steel tank contains carbon dioxide at a pressure of 13.0 atm when the temperature is 34oC. What will be the internal gas press
morpeh [17]

Answer:

D. 15.8atm

Explanation:

Given parameters:

Initial pressure = 13atm

Initial temperature  = 34°C = 34 + 273  = 307K

Final temperature  = 100°C = 100 + 273  = 373K

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we apply a derivation of the combined gas law taking the volume as a constant.

The expression is shown mathematically below;

        \frac{P_{1} }{T_{1} }   = \frac{P_{2} }{T_{2} }

P and T pressure and temperature values

1 and 2 are initial and final states

 Insert the parameters and solve for T₂;

    \frac{13}{307}   = \frac{P_{2} }{373}  

        P₂  = 15.8atm

4 0
3 years ago
Which gases are responsible for global warming?
elena-s [515]

Answer:  

Greenhouse gas Chemical formula Global Warming Potential, 100-year time horizon

Carbon Dioxide

Methane

Nitrous Oxide

Chlorofluorocarbon

Explanation:

8 0
3 years ago
Explain what it means to be considered a “renewable” energy source, and what it means to be a “non-renewable” energy source.
Neporo4naja [7]

Answer: Resources are characterized as renewable or nonrenewable

- a renewable resource can replenish itself at the rate it is used such as solar energy, wind energy, hydro energy, and tidal energy.

- a nonrenewable resource has a limited supply such as coal, gas, nuclear energy, and fossil fuels.

3 0
2 years ago
Other questions:
  • The following equation shows the equilibrium in an aqueous solution of ammonia:NH3(aq)+H2O(l)⇌NH4+(aq)+OH−(aq)Which of the follo
    9·1 answer
  • Which elements have the most similar chemical properties? Si, As, and Te N2, O2, and F2 Mg, Sr, and Ba Ca, Cs, and Cu
    13·1 answer
  • Sodium and chlorine combine to form table salt, also called sodium chloride. Sodium chloride is a(n) A. atom. B. element. C. com
    12·2 answers
  • What is an example of the third law of thermodynamics?
    13·1 answer
  • At a certain temperature and pressure, 0.20 mol of carbon dioxide has a volume of 3.1 L. A 3.1-L sample of hydrogen at the same
    14·1 answer
  • What is the answer?
    15·1 answer
  • Beer's Law states that A=ebc, where A is the absorbance, ε is the molar absorptivity of the solute, b is the path length, and c
    6·1 answer
  • If there's an oil spill and there's a fire in the ocean why can't the ocean water just put out the fire?
    14·1 answer
  • Block A is made of copper, which has a specific heat value of 0.385 J/g*C.
    13·1 answer
  • An oxidation-reduction reaction that is also a synthesis reaction
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!