Answer:
0.86 g
Explanation:
Given:
Pressure = 725 torr
The conversion of P(torr) to P(atm) is shown below:
So,
Pressure = 725 / 760 atm = 0.9539 atm
Volume = 225 mL = 0.225 L (1 mL = 0.001 L)
Temperature = 25 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T₁ = (25 + 273.15) K = 298.15 K
Using ideal gas equation as:
PV=nRT
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 = 0.0821 L.atm/K.mol
Applying the equation as:
0.9539 atm × 0.255 L = n × 0.0821 L.atm/K.mol × 298.15 K
⇒n = 0.0099 moles
From the reaction,
![MnO_2_{(s)}+4HCl_{(aq)}\rightarrow MnCl_2_{(aq)}+2H_2O_{(l)}+Cl_2_{(g)}](https://tex.z-dn.net/?f=MnO_2_%7B%28s%29%7D%2B4HCl_%7B%28aq%29%7D%5Crightarrow%20MnCl_2_%7B%28aq%29%7D%2B2H_2O_%7B%28l%29%7D%2BCl_2_%7B%28g%29%7D)
1 mole of chlorine is formed from 1 mole of ![MnO_2](https://tex.z-dn.net/?f=MnO_2)
Thus, moles of
= 0.0099 moles
Molar mass of
= 86.9368 g/mol
Mass = Moles*Molar mass = 0.0099 moles * 86.9368 g/mol = 0.86 g
D - Silicon
This is because Silicon has four electrons as indicated by the group it's in. Chlorine would have 7, Magnesium would have 2, Phosphorous would have 5, and Sulfur would have 6.
Hope this helps!
No. The answer is false.
Just read that sentence aloud and you'll know that it does not sound right
Answer:
true
Explanation:
drought is a period of unusually persistent dry weather that persists long enough to cause serious problems such as crop damage and/or water supply shortages. The severity of the drought depends upon the degree of moisture deficiency, the duration, and the size of the affected area.
Mass number on the periodic table is the bigger number. For example, Hydrogen's atomic number is 1, and mass number is 1.008. The mass number (rounded) is the total number of neutrons and protons in an atom.