<u>Answer:</u> The mass of ice cube is 77.90 grams
<u>Explanation:</u>
When ice is mixed with water, the amount of heat released by ice will be equal to the amount of heat absorbed by water.
The equation used to calculate heat released or absorbed follows:
![m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]](https://tex.z-dn.net/?f=m_1%5Ctimes%20c_1%5Ctimes%20%28T_%7Bfinal%7D-T_1%29%3D-%5Bm_2%5Ctimes%20c_2%5Ctimes%20%28T_%7Bfinal%7D-T_2%29%5D)
......(1)
where,
= mass of ice = ? g
= mass of water = 30.0 g
= final temperature = 19.5°C
= initial temperature of ice = 0.0°C
= initial temperature of water = 45.0°C
= specific heat of ice = 2.108 J/g°C
= specific heat of water = 4.186 J/g°C
Putting values in equation 1, we get:
![m_1\times 2.108\times (19.5-0)=-[30.0\times 4.186\times (19.5-45.0)]](https://tex.z-dn.net/?f=m_1%5Ctimes%202.108%5Ctimes%20%2819.5-0%29%3D-%5B30.0%5Ctimes%204.186%5Ctimes%20%2819.5-45.0%29%5D)
Hence, the mass of ice cube is 77.90 grams
Answer: option <span>B.The total mass of A and C, which are carbon and oxygen, is equal to the mass of B, which is carbon dioxide.
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Explanation:
1) The combustion of carbon is represented by the chemical equation:
C + O₂ → CO₂
2) The law of conservation of mass states that the mass of the products is equal to the mass of the reactants.
3) The reactants are C and O₂, while the product is CO₂.
4) The masses given are: A: 12 g, B: 44 g, and C: 32 g
Then, 12g + 32 g = 44 g, this is A + C = B.
Then, B represents the product, which is CO₂, whose molar mass is 44 g/mol.
Since, the molar mass of C is 12 g/mol, it is A; and since the molar mass of O₂ is 32, it is C.
Therefore, the answer is the option B.
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Yes magnesium is a pure substance and it is a element.
Answer:
48.075g(or 48g in correct sig figs)***
Explanation:
=48.075g
*64.1g is the mass of SO2 which is calculated by simply taking the mass of sulfur and oxygen(but doubling it since there are two oxygens) and adding them together(32.1+2x16.0)
**btw the mol units cancel because of dimensional analysis in case anyone was wondering why
***if your teacher is like mine and specifically wants your answer in correct sig figs, use the answer in parentheses as the original problem only has 2 sig figs
Answer:
the scientific name of lion is
Panthera leo
