Unit cells.
They are the smallest group of atoms that take form of a crystal and can repeat in 3 dimensions.
Molar mass helium gas :
He = 4.0 g/mol
number of moles: 3.75 / 4.0 => 0.9375 moles
1 mole ------ 22.4 ( at STP)
0.9375 ------ ?
volume = 0.9375 x 22.4 / 1
Volume = 21 / 1
Volume = 21 L
hope this helps!
Answer:
choice 3
Explanation:
Hydrogen bonding occurs when a H is bonded to a highly electronegative atom like F. Towards the upper right corner, most atoms have high electronegativity and small atomic radii, according to periodic trends.
Please give thanks :)
Answer:
A. 1613 °C
Explanation:
The asthenosphere is located just below the Earth’s crust.
It must be molten or semi-molten, so that convection currents can move the tectonic plates above it.
Rocks start to melt at about 1300 °C, so a temperature of 1613 °C sounds about right.
