Answer:
Wedges and dashes are used to indicate the three dimensional shape in a drawn structure.
A wedge indicates that the atom or group is GOING OUT of the page.
Explanation:
wedges and dashes are ways or drawings use to represent three dimensional shape in a structure. Lines are use to represent image in the structure. A wedge line shows that molecules or bonds are moving towards the viewer i.e out of the the page.
A dashes line shows that bonds or atom are moving away the viewer or going into the group.
The correct is answer is A, because fertilizer provides nitrogen to plants
Answer: Since this is merely a Physical Change, it is improper to write it as a chemical equation.
Tabulations of chemical elements differing in their organization from the traditional seen periodic system
Answer: 14.7 atm
Explanation:
Using the ideal gas law also called the general gas equation ;
PV = nRT
Where,
P = pressure
V = Volume
n = amount of substance
R = ideal gas constant
T = temperature
For the He sample;
V = 2.5 L
n = 1.5 mol
R = 8.314 J/mol/K or 0.0821 L atm/mol/K
T =?
T = PV/nR
T = 14.7*2.5/(1.5*0.0821)
T = 298.42K
For the H2 sample, since both are under the same condition :
P = nRT/V
P = (1.5*0.0821*298.42) ÷ 2.5
P = 14.7 atm.
