Answer:
103.98 kpa
Explanation:
Pv= nRT
Where
P= pressure of the system=
n= number of moles= 3 moles
T= temperature= 250 K
Volume of the container= 60 liters
R= 0.0821L.atm/K.mol
Substitute the values
Pv= nRT
P= nRT/ V
= (3×0.0821×250)/60
= 1.026 Atm
1atm= 101325 Pascal
1.026 atm= X
= 103984 pasca
Convert to kilopascal
= 103984 pasca /1000
= 103.98 kpascal
Answer:
B. The air pressure would increase 2X
Explanation:
Pressure = density × acceleration due to gravity × height
p = ρ × g × h
Pressure is force per unit area
p = F/a
Density is mass per unit volume
Pressure is directly proportional to density hence, any change in the density of a body directly affects the change in pressure of the body and vice versa.
Based on atomic properties and structure:
- Isotopes have the same proton number(atomic number) but different neutron numbers.
- An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.
- The mass number of an atom is determined by the sum of protons and neutrons.
<h3>What are isotopes?</h3>
Isotopes are atoms of an element having the same atomic number but different mass numbers.
The difference in mass number is dues to different neutron numbers.
However, because they have the same proton number, they are atoms of the same element.
Neutral atoms contains equal number of protons and electrons.
An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.
The mass number of an atom is determined by the sum of protons and neutrons.
Learn more about isotopes at: brainly.com/question/14220416
Answer/Explanation:
Experimental investigations are the best type of scientific investigation to demonstrate cause-and-effect relationships because they allow the investigator to actively manipulate variables and control conditions. This change can be measured to gather evidence to support or refute the cause-and-effect relationship. Experimental investigations also use a control group a group that does not receive the factor being tested for comparison.