Test tubes, flasks, bunsen burners, random chemical equations
It measure the distance between two consecutive waves within the phase.
Answer:
-1190.24 kJ
Explanation:
The enthalpy change in a chemical reaction that produces or consumes gases is given by the expression:
ΔH = ΔU + Δngas RT
where Δn gas is the change of moles of gas, R is the gas constant,and T is temperature.
Now from the given balanced chemical reaction, the change in number of mol gas is equal to:
Δn gas = mole gas products - mole gas reactants = 2 - 5/2 = -1/2 mol
Sionce we know ΔU and the temperature (298 K), we are in position to calculate the change in enthalpy.
ΔH = -1189 x 10³ J + (-0.5 mol ) 8.314 J/Kmol x 298 K
ΔH = -1.190 x 10⁶ J = -1.190 x 10⁶ J x 1 kJ/1000 J = -1.190 x 10³ J
Answer:
10 Neutrons
Explanation:
Atomic Mass = # of Protons + # of Neutrons
Atomic Number = # of Protons in nucleus and what element
20 = 10 protons + x # of neutrons
10 = x # of protons
<h3>Answer:</h3>
6278 mmHg
<h3>
Explanation:</h3>
Kilopascal (kPa) and Millimeter of Mercury (mm Hg) are both the units of Pressure. In medical science the pressure is often measured in mm of Hg.
Also,
0.133322387415 kPa equals = 1 mmHg equals
Then,
837 kpa will be equal to = X mmHg
Solving for X,
X = (837 kPa × 1 mmHg) ÷ 0.133322387415 kPa
X = 6278.0153898 mmHg
Or when rounded to 4 significant numbers,
X = 6278 mmHg
