Answer:
Explanation:
Henry's law states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid
number of moles of cyclopropane = 1.84 g / 42.08 g/mol = 0.044 mol
number of mole of water = 1010000 g / 18.02 g/mol = 56048.83 mol
mole fraction of cyclopropane = mole of cyclopropane / ( mole of water + mole of cyclopropane) = 0.044 mol / 56048.87 = 7.85 × 10⁻⁷
P cyclopropane = k henry × mole fraction of cyclopropane = 4273 atm × 7.85 × 10⁻⁷ = 0.00335 atm
b) number of cyclopropane molecules present in each cubic centimeter = ( 0.044 mol / 1010) × 6.022 × 10 ²³ / 1000 cm³ = 2.623 × 10 ¹⁶ molecules in cm³
The cornea does not contain any blood vessels, but instead contains many nerve endings that make it extremely sensitive. That is why a scratch or a loose eyelash is so painful.
Number of moles of a substance can be calculated from mass of the substance and its molar mass as follows:
Here, n is number of moles, m is mass and M is molar mass.
For aspirin: 324 mg
Molecular formula is and molar mass of aspirin is 180.157 g/mol, thus, number of moles will be:
For sodium hydrogen carbonate: 1904 mg
Molecular formula is and molar mass is 84.007 g/mol, thus, number of moles will be:
For citric acid: 1000 mg
Molecular formula is and molar mass is 192.124 g/mol, thus, number of moles will be:
Therefore, number of moles of aspirin, and citric acid in the tablet is 0.0018 mol, 0.0226 mol and 0.0052 mol respectively.
Answer:
1.7
Explanation:
4.52/2.6 = 1.738461538, which can be simplified to 1.7