Independent Variable here is ”Speed”, since the independent variable is defined as (what's the scientist changes or what changes on its own)... And in here, both cars were traveling at 60 mph ’at a certain point, so, one of them might speed up or stay behind/lower it's speed from the other, depending on it's driver’.
Dependent Variable here is ”Distance”, since the dependant variable is defined as (what s being studied/measured).
Warm front Forms when a moist, warm airmass slides up and over a cold air mass. As the warm airmass rises, it condenses into a broad area of clouds. A warmfront brings gentle rain or light snow, followedby warmer, milder weather.
<h2>Mark as brainlist please</h2>
82 because that’s my answer
<u>Answer:</u> The pH of the cleaning compound is 10.44
<u>Explanation:</u>
pH is defined as the negative logarithm of hydrogen or hydronium ion concentration that are present in a solution.
The equation representing pH of the solution follows:
We are given:
Putting values in above equation, we get:
Hence, the pH of the cleaning compound is 10.44
Answer:
D) 5.5 g Fe₂S₃.
Explanation:
- The balanced chemical reaction is: 16Fe(s) + 3S₈(s) → 8Fe₂S₃(s)
- It is clear that 16.0 mole of Fe reacts completely with 3.0 moles of S₈ to produce 8.0 moles of Fe₂S₃.
- We need to calculate the no. of moles of the reacted Fe filings (3.0 g) and yellow sulfur solid (2.5 g).
No. of moles of Fe filings (3.0 g) = mass /atomic mass = (3.0 g) / (55.845 g/mol) = 0.0537 mol.
No. of moles of yellow sulfur solid (2.5 g) = mass / molar mass = (2.5 g) / (256.52 g/mol) = 0.009746 mol.
- We need to determine the limiting reactant,
The theoretical ratio of (Fe: S₈) is (16: 3) which is 5.333.
The actual ratio of the reactants (Fe:S₈) is (0.0537 mol: 0.009746 mol) which is 5.5.
- This means that Fe is found with a slight increase and S₈ is the limiting reactant.
- Now, we can calculate the no. of moles of produced Fe₂S₃;
<u><em>Using cross multiplication:</em></u>
3.0 moles of S₈ produces<em><u> </u></em>→ 8.0 moles of Fe₂S₃, from the stichiometry,
0.009746 moles of S₈ produces → ??? moles of Fe₂S₃.
- The no. of moles of the produced Fe₂S₃ = (8.0 mol)(0.009746 mol) / (3.0 mol) = 0.026 mol.
- Finally, we can get the mass of the the produced Fe₂S₃.
The mass of the the produced Fe₂S₃ = no. of moles x molar mass = (0.026 mol)(207.9 g/mol) = 5.405 g ≅ 5.5 g.