This is because a higher grade will result in a higher GPA which can help people get into college and even help them get scholarships. Lower grades will prevent you from getting into a good college and from getting scholarships. Higher grades an also result in free things! Car insurance rates go lower for kids with better grades/ a higher GPA.
Answer:
Reverse the reaction
Explanation:
Reactions:
Overall:
As can be seen, in the overall reaction we have in the reactants like in the second reaction and in the products. The is in the first reaction but as a reactant so we need to reverse that reaction:
Combining:
debris from the volcanic ash has covered the sun which makes the temperature cold.
Answer:
8 Silicon atom are present in unit cell.
16 oxygen atoms are present unit cell.
Explanation:
Number of atoms in unit cell = Z =?
Density of silica = tex]2.32 g/cm^3[/tex]
Edge length of cubic unit cell = a = 0.700 nm =
Molar mass of Silica =
Formula used :
where,
= density
Z = number of atom in unit cell
M = atomic mass
= Avogadro's number
a = edge length of unit cell
On substituting all the given values , we will get the value of 'a'.
1 silicon is 2 oxygen atoms. then 8 silicon atoms will be 16 oxygen atoms.