Answer:
The mass of nitrogen gas will be 31,3 g
Explanation:
We calculate the weight of 1 mol of N2 (nytrogen gas):
Weight 1 mol N2= 2 (weight N)= 2 x 14 g/mol = 28g/mol
The conditions STP are 1 atm of pressure and 273K of temperature. We use the formula:
PV=nRT
1 atmx 25,0L= n x0,082 l atm/K mol x 272 K
n= 1 atmx 25,0L/0,082 l atm/K mol x 272 K= 1, 12 mol
1 mol N2-----28 g
1,12mol N2---x= (1,12mol N2 x28g)/1 mol N2= 31, 3 g
The answer to your first question is valence electrons. The answer to your second is positive.
Answer:
claim to be scientific, yet do not follow all the rules of science
Explanation:
Pseudoscience as the name implies "pseudo=false" means false science. It is a practice which poses itself as being scientific but does not conform to scientific principles or methods. In other words, they claim to be scientific but in the actual sense, they are not because they do not follow the rules guiding scientific knowledge.
Examples of pseudoscience as stated in the question are astrology, biorhythms. These ideas or studies are not subject to principles that qualifies them to be scientific.