Answer:
The answer to your question is Isotope
Explanation:
Isotopes are atoms with the same number of protons and electrons but their atomic mass is different due to their number of neutrons is different.
In this kind of elements, the number of protons stays the same.
Some isotopes are radioactive but others do not.
Some isotopes are used to know the age of fossils or ancient things.
Answer:
Units of a = 
Units of b = 
Explanation:
The Van der Waal's equation is:-
Where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value
a and b are van der Waal's constant
If pressure is taken in atm and volume in L. So,
represents the pressure correction term. Then,
Units of a =
represents the volume correction term. Then,
Units of b =
Under STP condition, the gas has a rule of 22.4 L per mole. And according to the ideal gas law, V1/T1=V2/T2. Under STP, 1.5 mol gas has volume of 33.6 L. So the volume under 22 C is 33.6*295/273=36.3 L.
Answer: I remember looking out of the car as we pulled up to the Frantz school.”
“I thought maybe it was Mardi Gras.”
“As we walked through the crowd, I didn’t see any faces.”
“[The school] looked bigger and nicer than my old school.”
“The crowd behind us made me think this was an important place.”
“It must be college, I thought to myself.
Explanation:
<span>Petrolyn motor oil is a combination of natural oil and synthetic oil.
</span><span>it contains 8 liters of natural oil for every 5 liters of synthetic oil.
</span>natural oil / synthetic oil
8 / 5
let x= liters of synthetic oil and
728-x = liters of natural oil
8/5 = 728-x/x , 8x = 5 (728-x)
8x = 3640-5x
8x+5x = 3640
13x = 3640
x = 280 litres
280 liters of synthetic oil is needed to make 728 liters of petrolyn oil.
