Answer:
0.0821 atm.L/Kmol
Explanation:
At stp, the values temperature, pressure and volume is given below:
Pressure (P) = 1 atm
Temperature (T) = 273 K
Volume (V) = 22.4 L
At stp, 1 mole of a gas occupy 22.4L.
Number of mole (n) = 1 mole
Gas constant (R) =?
The ideal gas equation is given below:
PV = nRT.
With the above equation, the gas constant R can be obtained as follow:
1 atm x 22.4L = 1 mole x R x 273K
Divide both side by (1 mole x 273 K)
R = (1 atm x 22.4L) / (1 mole x 273 K)
R = 0.0821 atm.L/Kmol
Therefore, the gas constant is 0.0821 atm.L/Kmol
Answer:
I'm pretty sure its a combination reaction!!
Explanation:
they generally form between metals and non metals like that^
The answer is <span>b. 1% H, 42% Cl, 57% O.</span>
Let's first calculate a molar mass (M) of HClO₃. <span>Molar mass is a mass of 1 mole of a substance. It can be expressed as the sum of relative atomic masses (Ar), which are masses of atoms of the elements:
</span>M(HClO₃) = Ar(H) + Ar(Cl) + 3Ar(O)
Ar(H) = 1 u
Ar(Cl) = 35.5 u
Ar(O) = 16 u
M(HClO₃) = Ar(H) + Ar(Cl) + 3Ar(O) = 1 + 35.5 + 3 · <span>16 = 84.5 u
Now, we just need to calculate mass percent of each element using the proportion:
Ar : x = M : 100% </span>⇒ x = Ar ÷ M · 100%
Hydrogen: x = Ar(H) ÷ M · 100% = 1 ÷ 84.5 · 100% = 1.2% ≈ 1%
Chlorine: x = Ar(Cl) ÷ M · 100% = 35.5 ÷ 84.5 <span>· 100% = 42%
</span>Oxygen: x = 3Ar(O) ÷ M · 100% = 48 ÷ 84.5 · 100% = 56.8% ≈ 57%
Answer:
A compound
Explanation:
A compound is chemical entity that is formed when 2 or more elements are joined together in a fixed ratio.
This fixed ratio is simply the numerical values of the numbers of these elements. Take for example in the case of water, one atom of oxygen joins together with two atoms of hydrogen. The fixed ratio here is 1 to 2 or 2 to 1 depending on the reference element.
For example also in methane. The molecular formula of Methane is CH4. The ratio between carbon and hydrogen is 1 to 4 here
Answer:
About 366 joules
Explanation:
PEg = mgh
PEg = 4.24(8.81) * 9.81
PEg = 37.3544 * 9.81
PEg = 366.446664, which rounds to 366 joules.
