Sam records the mass of his evaporating dish as 6.488 g. He records the mass of the evaporating dish and the sample of hydrate a
1 answer:
Answer:
moles of water were removed from the sample by the heating process
Explanation:
Given
Mass of the evaporating dish grams
Mass of the sample of hydrate grams
Mass of the sample and dish after heating grams
The weight of water removed through evaporation
grams
Weight of one mole of water grams
Number of moles of water in Grams of water is equal to
moles
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Answer:
Explanation:
1. First take the cylinder volume formula:
2. Then take the values for the radius and the height of the cylinder and replace them into the formula:
3. Solve the equation:
Answer:
Explanation:
Ideal gases follow the combined law of gases:
Where,
- Pressure is the absolute pressure and its units may be in any system, as long as they are the same for both states.
- Also, volume may be in any units, as long as it they are the same for both states.
- Temperature must be absolute temperature, whose unit is Kelvin.
Your data are:
- P₁ = 1200.00 mmHg
- P₂ = 1.11842 atm
- V₁ = 85.0 mL
- V₂ = 350.0 mL
- T₂ = ?
- T₁ = 90.0ºC
<u>1. Conversion of units:</u>
- P₁ = 1200.00 mmHg × 1.00000 atm / 760.000 = 1.578947 mmHg
- T₁ = 90.00ºC + 273.15 = 363.15K
<u>2. Solution</u>
- Clearing T₂, from the combined gas equation you get:
- Substituting the data:
- Convert to celsius:
10 g of glue with 13 g of water ,
Mass ratio of the material can be calculated as:
8 g of sodium borate suspended in 11 g of water, mass ratio can be calculated as: