Answer:
2.02 g H₂
General Formulas and Concepts:
<u>Chemistry - Atomic Structure</u>
- Reading a Periodic Table
- Using Dimensional Analysis
- STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K
Explanation:
<u>Step 1: Define</u>
22.4 L H₂ at STP
<u>Step 2: Identify Conversions</u>
STP - 22.4 L / mol
Molar Mass of H - 1.01 g/mol
Molar Mass of H₂ - 2(1.01) = 2.02 g/mol
<u />
<u>Step 3: Convert</u>
<u />
= 2.02 g H₂
Answer:It is because acid and water react violently exothermically, producing heat and occasionally melting the fluid.
Explanation:
Answer:
liquid junction potentials
when a cell contains a boundary between two electrolytic solutions of different composition or concentration, a liquid junction potential is developed due to the "diffusion of the various components at characteristic rates in the boundary zone."
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I believe the correct answer from the choices listed above is the first option. The element that would most likely have a positive electron affinity would be sodium, Na. Electron affinity is defined as the change in energy of a neutral atom when an electron is added to the atom.
<span>Answer:
Q = 500.0 x 4.18 x 8.63 = 18037 J => 18.037 kJ
moles anthracene = 0.455 g/ 178.234 g/mol=0.00255
0.00255 moles give 18.037 kJ
0.00255 : 18.037 = 1 mole : x
x = 7073 kJ/mol
enthalpy = - 70.73 kJ/mol</span>
