Answer:
The mole fraction is the number of moles of something divided by the number of total moles present. First, let us work out the number of moles of KCl present. A 26.3% w/w solution would contain 26.3 g of KCl per 100 g of solution. Hence, 26.3 g of KCl is 26.374.5513 = 0.353 moles
Explanation:
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Answer:
the answer would be runner A ,because they were ahead of all the other runners and runner A got there before the other runner so runner A has the fastest average speed
Explanation:
Answer:
Synthesis
General Formulas and Concepts:
<u>Chemistry - Reactions</u>
- Synthesis Reactions: A + B → AB
- Decomposition Reactions: AB → A + B
- Single-Replacement Reactions: A + BC → AB + C
- Double-Replacement Reactions: AB + CD → AD + BC
Explanation:
<u>Step 1: Define RxN</u>
RxN: NH₃ + H₂SO₄ → (NH₄)₂SO₄
<u>Step 2: Identify</u>
Combining 2 compounds to form 1.
NH₃ + H₂SO₄ → (NH₄)₂SO₄
A + B → AB
<em>It is a Synthesis Reaction.</em>
Answer:
17.3 g
Explanation:
<u>Given the following data;</u>
- Quantity of heat, Q = 0.507 J
- Temperature = 0.007°C
- Specific heat capacity of water = 4.2 J/g°C
Mathematically, Heat capacity is given by the formula;
![Q = MCT](https://tex.z-dn.net/?f=%20Q%20%3D%20MCT%20)
Where;
- Q represents the heat capacity or quantity of heat.
- M represents the mass of an object.
- C represents the specific heat capacity of water.
- T represents the temperature.
Making "M" the subject of formula, we have;
![Mass, \ m = \frac {Q}{CT}](https://tex.z-dn.net/?f=%20Mass%2C%20%5C%20m%20%3D%20%5Cfrac%20%7BQ%7D%7BCT%7D%20)
Substituting the values into the formula, we have;
![Mass, \ m = \frac {0.507}{0.007*4.2}](https://tex.z-dn.net/?f=%20Mass%2C%20%5C%20m%20%3D%20%5Cfrac%20%7B0.507%7D%7B0.007%2A4.2%7D%20)
![Mass, \ m = \frac {0.507}{0.0294}](https://tex.z-dn.net/?f=%20Mass%2C%20%5C%20m%20%3D%20%5Cfrac%20%7B0.507%7D%7B0.0294%7D%20)
<em>Mass, m = 17.3 grams</em>