Answer:
Astronomy is a subject area which contain a question that can be answered by Science.
Explanation:
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Answer:
About 7.886 grams
Explanation:
8 sulfurs will have a molar mass of 32.065*8=256.52g, while 32 flourines will have a molar mass of 18.998*32=607.936. In total, this is a molar mass of 864.456.
2.34/256.52 * 864.456=7.886g
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Answer: 1. 0.005mol
2. 965C
Explanation:Please see attachment for explanation
Answer:
Explanation:
A quilt is a usually multilayered textile, made to warm the body. Air is trapped between the layers of the fabric of the quilt. This is the reason it is a better insulator compared to a woolen blanket of the same thickness.
As air is the poor conductor of heat, therefore, body heat is trapped inside the quilt and thus it more effective for maintaining the body heat
Answer:
pH = 3.49
Explanation:
We have a buffer system formed by a weak acid (HNO₂) and its conjugate base (NO₂⁻ coming from KNO₂). We can calculate the pH of a buffer ssytem using the Henderson-Hasselbach equation.
pH = pKa + log [base] / [acid]
pH = -log Ka + log [NO₂⁻] / [HNO₂]
pH = -log 4.50 × 10⁻⁴ + log 0.290 M / 0.210 M
pH = 3.49