We are asked to calculate the number of moles in a given mass of a substance. To be able to calculate it, we need the molar mass of the substance. For (NH4)2Cr2O7, the molar mass would be <span>252.07 g/mol. We calculate as follows:
0.025 g </span>(NH4)2Cr2O7 ( 1 mol / 252.07 g ) = 0.0001 mol <span>(NH4)2Cr2O7
Hope this answers the question. Have a nice day.</span>
Answer:
183 K
General Formulas and Concepts:
<u>Chemistry - Gas Laws</u>
Combined Gas Law: PV = nRT
- P is pressure
- V is volume (in Liters)
- n is amount of moles
- R is gas constant -
- T is temperature (in Kelvins)
Explanation:
<u>Step 1: Define</u>
10.0 L
3.00 mol H₂
4.50 atm
<u>Step 2: Find Temperature</u>
- Substitute [CGL]:
- Isolate temperature <em>x</em>:
- Rewrite:
- Evaluate:
<u>Step 3: Check</u>
<em>Round to the nearest whole number.</em>
182.704 K ≈ 183 K
The answer is C
The gas is compressible and assumes the volume and shape of its container whereas a liquid is not compressible and assumes the shape of a portion.
C is the only one that says it assumes the shape of a portion. If you put water in your cup, it does not fill it all up. If you put water in a jar, it does not mean its equal in volume . If you put water in a jar, it does take the shape of the jar.