Answer:
Actually graphene is not occurred in naturally.
Explanation:
graphene is a layer or a sheet which is extracted from graphite because graphite is layered material. most of the time famous scotch tape may produce graphene but you can't identify it without using electron microscope
This immense mountain range began to form between 40 and 50 million years ago, when two large landmasses, India and Eurasia, driven by plate movement, collided. Because both these continental landmasses have about the same rock density, one plate could not be subducted under the other.Mar. 9, 2015
To calculate the amount of the compound in the units of grams, we need to first obtain for the molar mass of the compound. We calculate as follows:
MgCl2 = <span>24.31 + (2 x 35.45) = 95.21 g/mol
</span><span>340 g MgCl2 ( 1 mol / 95.21 g ) = 3.57 mol MgCl2
Hope this answers the question. Have a nice day.</span>
Answer:
3 carbohydrate
Explanation:
Carbohydrates are among the major macromolecules, others being proteins, lipids and nucleic acids. They contain carbon, hydrogen and oxygen atoms in their structure.
(I hope this help if not im sorry)
Answer:
c = 0.9 j/g. °C
Explanation:
Given data:
Mass of aluminium = 100 g
Initial temperature = 90 °C
Final temperature = 20°C
Heat transfer = 6300 J
Specific heat of aluminium = ?
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
The Q will negative because metal release the heat.
c = Q / m. ΔT
ΔT = t2 - t1
ΔT = 20°C - 90 °C
ΔT = -70 °C
c = -6300 j/ 100 g.-70°C
c = -6300 j/ -7000 g.°C
c = 0.9 j/g. °C
