Answer:
"nonmetal, nonmetal"
Explanation:
Oxygen is a non metal and Nitrogen is a non metal. It is 8th element of the periodic table. It is located in period 2 and group 16.
Nitrogen lies at the group 15 of the periodic table. Its atomic no is 7. Its valency is 2.
Hence, the correct option is (c) "nonmetal, nonmetal".
The answer is nucleation because can turn liquids into solids.
Answer:
The answer is D.
Explanation:
Silver consists of 92.5% silver, and the remaining part is copper. ... Pure silver is not susceptible to tarnish in a pure oxygen environment. However, the copper that is contained in 925 sterling silver may react to the ozone and hydrogen sulfide in the air and cause sterling silver to tarnish.
When 25.6 g 
is burned, the moles of 
emitted into the atmosphere is 1.80 mol
<u>Explanation:</u>
The molar mass of octane is calculated as 8(12) +18(1) = 114 g/mol.
Where atomic mass of Carbon is C=12, and Hydrogen H=1.The sample contains 25.6 g of octane, Therefore
The combustion of octane can be written as:
The mole ratio can be represented as:
= 16:2 = 8:1.
Hence, the quantity of carbon dioxide emitted is:
= 1.80 mol
