Answer:
1.17 grams
Explanation:
Let's consider the balanced equation for the combustion of ethylene.
C₂H₄(g) + 3 O₂(g) → 2 CO₂(g) + 2 H₂O(l)
We can establish the following relations:
- 1411 kJ are released (-1411 kJ) when 1 mole of C₂H₄ burns.
- The molar mass of C₂H₄ is 28.05 g/mol.
The grams of C₂H₄ burned to give 59.0 kJ of heat (q = -59.0 kJ) is:

Answer:
The answer to your question is: letter C
Explanation:
The only difference between the samples of Zinc is their presentation, one is a chunk of zinc and the other one is shavings.
1) Catalyst This option is incorrect because the description
do not mention anything about catalyst.
2) Nature of the reaction The nature of the reaction is the same.
3) Surface area This is the right answer because in the chunk
there is less surface area than in the shavings.
4) Temperature It is not mention anything about temperature in
the description.
That is true because the warm air goes up and the cold air comes down
Answer:
segment 4
Explanation:
Its segment 4 because even though they only traveled 55(km) its only been 1 hour. Every other one took ether 1 hour and 5 minutes or 2 hours.(this is my honest opinion im sorry if its wrong)
corrected question:
A chemist determined by measurements that 0.03 moles of calcium sulfide participate in a chemical reaction. Calculate the mass of calcium sulfide that participates
Answer:
Explanation:
number of moles of CaS
molar mass of CaS = 40+32 = 72g/mol
number of moles = mass/ molar mass
mass = number of moles * molar mass
mass = 0.03 *72
mass of calcium sulfide = 2.16g