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777dan777 [17]
2 years ago
8

PLS HELP What is one of the benefits that scientists have discovered from organisms' daily exposure to radioisotopes? 1, being a

ble to Carbon date fossils 2. X-ray Imaging capability 3. invention of microwave cooking
Chemistry
2 answers:
True [87]2 years ago
5 0
Being able to carbon date fossils
77julia77 [94]2 years ago
4 0

Answer:

The correct answer is option 1, that is, being able to carbon date fossils.

Explanation:

With the help of daily exposure to radioisotopes of the organisms, the scientists have found the concept of carbon date fossils. The age of the organic matter can be found from the relative ratios of C-12 and C-14, that is, the isotopes of carbon with the application of carbon dating. This proportion modifies over the years as carbon-14 decays and does not get replaced as there is no exchange with the atmosphere.

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Air is an example of a mixture because the elements and compounds that make up air retain their individual properties.
inysia [295]

Answer:

True

Explanation:

True definition of a mixture itself

7 0
2 years ago
How many liters of O2 at 298 K and 1.00 bar are produced in 1.50 hr in an electrolytic cell operating at a current of 0.0200 A?
stellarik [79]

Answer: 0.0069L

Explanation:

2H2O(l) ---->O2(g) + 4H+(aq) + 4e-

no of moles= it/eF

NO of moles of O2 produced = (Current in Ampere x Time in second)/ (Faraday constant x Number of electrons required)

Moles of O2 produced = (0.02x (60 x 60X1.5 s)/(96485 x 4)

= 0.0002798 moles= 2.798x 10 ^-4moles

Using  ideal gas equation,

P V = n R T

Where, P is the pressure,

V is the volume,

n is the number of moles,

R is the gas constant, and T is the temperature

We have, 1 bar = 0.986923 atm

Substituting the values,

V = nRT/P = (2.798 x 10-4moles x 0.08205 L atm mol K x 298 K)/ 0.986923 atm = 0.0069L

Volume of O2 produced = 0.0069L

7 0
3 years ago
How much heat is absorbed when a 298.3 g piece of brass goes from 30.0 to 150
igor_vitrenko [27]

Answer:

Q = 1360.248 j

Explanation:

Given data:

Mass of brass = 298.3 g

Initial temperature = 30.0°C

Final temperature = 150°C

Specific heat capacity of brass = 0.038 J/g.°C

Heat absorbed = ?

SOLUTION:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 150°C - 30.0°C  

ΔT = 120°C

Q = 298.3 g × 0.038 J/g.°C × 120°C

Q = 1360.248 j

3 0
3 years ago
John Fang has 5 apples, Jonny ate 3, how many are left!
Doss [256]
Answer:5-3=2

As 5apple eaten 3apple so left 2apple
8 0
3 years ago
Get correct for brainleist!
soldier1979 [14.2K]
I would say d
Hope that helps :)
5 0
3 years ago
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