Hey there!:
the chemical reaction between 2-iodoctane and sodium nitrite is as follows:
Metals are conductors and therefore they carry high amount of electricity. Semiconductors have less electrical conductivity than metals. In metals electrons carry out the current. But in semiconductors, current is carried out by the flow of electrons of positively charged holes.
Answer:
D. A change of appearance
Answer:
1015.92 cmH₂O
Explanation:
The pressure of a fluid (liquid or gas) can be measured by the force that it does in a column of a standard liquid. When the liquid is the mercury, the pressure is measured in units of Hg, and when the column is filled with water, the value is obtained in units of H₂O.
The value depends on the density and the specific weight of the liquid. To convert mmHg to cmH₂O:
1 mmHg ----------- 1.36 cmH₂O
747 mmHg ------ x
By a simple direct three rule:
x = 1015.92 cmH₂O
Calcium has electrons in more energy levels than magnesium. The number of electron in calcium atom is 20 which means 4 energy levels. (2 electron in first shell+ 8 electron in second shell+8 electron in third shell+ 2 electron in fourth shell). While number of electron in magnesium atom is 12 which means 3 energy levels. (2 electron in first shell+ 8 electron in second shell+ 2 electron in third shell). Also the Calcium third energy level contains more electron than magnesium.
