Answer:
765.0 grams CuS
Explanation:
The limiting reagent is the reactant which completely reacts before the other reactant(s) is used up. When 9.0 moles Na₂S and 8.0 moles CuSO₄ react, it appears that CuSO₄ is the limiting reagent. You can tell because it results in the production of less product.
You can determine the mass of CuS by multiplying the moles by the molar mass. It is important to arrange the ratio in a way that allows for the cancellation of units.
Molar Mass (CuS): 95.62 g/mol
8.0 moles CuS 95.62 g
------------------------- x ----------------------- = 765.0 grams CuS
1 mole
Final temperature of platinum :- 36.5°C
Final temperature of Zinc :- 29.17°C
Answer:
Your question seems to me that it is somewhat poorly written, but it could help you by telling you that by increasing the collision of the individuals, the friction between them increases, therefore increasing the release of energy in the form of heat and thus increasing the temperature.
Therefore, the hypothesis raised would be correct.
Explanation:
If the shock is perfectly inelastic (plastic), the kinetic energy is not conserved and, as a consequence, the colliding bodies can undergo deformations and increase in temperature.
The heat from your hand would be absorbed by the (assumed) colder flask, since an endothermic reaction means that the reaction requires an absorption of heat as opposed to an exothermic reaction, which releases heat.
Answer:
9.1747x10⁻²⁵g
Explanation:
The mass defect is the difference between the mass of a nucleus and the mass of its particles. The nucleus is formed by protons and neutrons. The atomic number of Cobalt is 27, which means that it has 27 protons in its nucleus. The number of neutrons is the mass (60) less than the number of protons, so it is 33.
Then:
Mass of 27 protons = 27 x 1.00728 = 27.19656 amu
Mass of 33 neutrons = 33 x 1.00867 = 33.28611 amu
Total mass = 60.48267 amu
Mass defect = 60.48267 - 59.9338
Mass defect = 0.54887 amu
1 amu = 1.66054x10⁻²⁴ g, so 0.54887 amu = 9.1747x10⁻²⁵g
