Answer:
Its enviormental science because enviormental science is an interdisciplinary academic field that integrates physical.
Answer:
1/2 cup evaporated milk plus 1/2 cup water.
Explanation:
So you can be safe and noting bad can happen to you
Answer:
a billion boron atoms are contained in a mass m= 2.21*10⁻¹⁴ gr of tetraborane
Explanation:
Since there are an Avogadro number (N= 6.023*10²³ molecules/mole) of molecules of tetraborane in a mole of tetraborane , and per each molecule there are 4 atoms of B . Then
number of moles n = a/(4*N)
where a= number of atoms
the corresponding mass of tetraborane m is
m= n*M
where M= molecular weight of tetraborane = 53.32 g/mol
then
m= n*M = a*M/(4*N)
replacing values
m= a*M/(4*N)= 1.0*10⁹ atoms of B * 53.32 gr/mole /( 4 atoms of B/molecule* 6.023*10²³ molecules/mole ) = 2.21*10⁻¹⁴ gr
m= 2.21*10⁻¹⁴ gr
