I think that the answer is a research bc it’s just sounds like that right answer
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
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In 1854, Cyrus West Field conceived the idea of the telegraph cable and secured a charter to lay a well-insulated line across the floor of the Atlantic Ocean. Obtaining the aid of British and American naval ships, he made four unsuccessful attempts, beginning in 1857.
Answer:
- 1,882.8 joules
- 83.652 calories
Explanation:
Given:
Amount in calories = 450 calories
Amount in joules = 3.5 × 100 joules
Find:
- Change in joules
- Change in calories
Computation:
We know that,
1 calories = 4.184 joules
So,
Amount in calories = 450 calories
= 450 × 4.184
= 1,882.8 joules
Amount in joules = 3.5 × 100 joules
= [3.5 × 100] / 4.184
= 83.652 calories
Answer: 3 moles
Explanation:
Using the ideal gas equation; PV = nRT
P= Pressure= 2.1 Atm V= Volume = 3.5L T= Temperature = 315K
n= no of moles
R= Gas constant = 0.08206 L .atm. mol-1 . K-1
Making 'n' the subject of the formular, we then have;
n = PV / RT
= 2.1 Atm x 3.5L / 0.08206 L .atm. mol-1 . K-1 x 315K
= 7.35 / 25.849
= 0.28 approx 3moles
