Answer:
25 possibly
Explanation:
I'm not too sure about this, but sodium oxide is Na2O, 2 sodium and 1 oxygen, so 12.5g * 2 is 25
If someone else comes up with a more convincing argument listen to them
Answer:
Explanation:
Hello!
In this case, as we know the mass of the total sample, we can first compute the mass of oxygen:
Next, we compute the moles of each element:
Now, we divide the moles by 0.184 moles, the fewest ones, to obtain:
Therefore, the empirical formula is:
Regards!
Answer: the system of blood, blood vessels and the heart that carries blood throughout the body
Explanation: i hope this helps
Critical pressure is the pressure of a gas or vapor in its critical state and critical point is a point on a phase diagram at which both the liquid and gas phases of a substance have the same density, and are therefore indistinguishable.
Answer:
235k
Explanation:
To solve this problem, we will use the general gas equation.
In its simplest form, the general gas equation can be represented as follows:
P1V1/T1 = P2V2/T2
P1 = 700mmHg
V1 = 760ml
T1 = 40 degrees Celsius = 40 + 273.15 = 313.15K ( conversion into standard temperature unit)
P2 = 1.25 atm
We have to covert this into the same unit as the first pressure.
760mmHg = 1atm
x mmHg = 1.25 atm
x = 1.25 * 760 = 950mmHg
V2 = 420ml
T2 = ?
Now, rearranging the equation will yield:
T2 = P2V2T1/P1V1
T2 = 950 * 420 * 313.5/700 * 760
T2 = 235.125K or -38.025 degrees celcius
