I believe it is a Covalent Bond because 1st off, Calcium sulfide is made up of 2 elements, Calcium (Na) and Sulfer (S). Both elements want to obtain 8 electrons to become balanced (An octet) so therefore, these electrons are shared between these 2 elements.
The pressure of the tyre after the temperature change is 0.89atm. Details about pressure can be found below.
<h3>How to calculate pressure?</h3>
The pressure of the tyre can be calculated using the following equation:
P1/T1 = P2/T2
Where;
- P1 = initial pressure
- P2 = final pressure
- T1 = initial temperature
- T2 = final temperature
According to this question, a tyre at 21°C (294K) has a pressure of 0.82 atm. Its temperature decreases to –3.5°C (269.5K).
0.82 × 294 = P2 × 269.5
241.08 = 269.5P2
P2 = 241.08 ÷ 269.5
P2 = 0.895atm
Therefore, the pressure of the tyre after the temperature change is 0.89atm.
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I believe the answer is B. multi-ions
plz tell if wrong
Molar mass:
iron = 55.8 g/mol
Sulfur = 32.0 g/mol
Number of moles
<span>53.70 / 55.8 = 0.96 moles </span>
46.30 / 32.0 = 1.44 moles
Using the values determines the entire lower proportion in moles of the elements, just divide by the smaller one
Fe = 0.96 / 0.96
Fe = 1 mole
S = 1.4 / 0.96
<span>S = 1.5 moles </span>
multiply them by 2.
iron : 2 * 1 = 2
Sulfur : 1.5 * 2 = 3
<span>the empirical formula is Fe₂S₃</span>