The answer is: 60.
Tobacco products are made up of thousands of chemicals, including at least 60 known to cause cancer (carcinogens).
Some of carcinogens chemicals are: acetaldehyde, arsenic, radioactive elements (for example polonium-210), nitrosamines, nickel, benzene, polycyclic aromatic hydrocarbons, vinyl chloride.
Smoking tobacco causes at least 15 different types of cancer. For example: mouth, pharynx, larynx, oesophagus, liver, pancreas, stomach, kidney cancer.
Answer:
High surface tension causes boiling point to increase.
Explanation:
The surface tension is related to the psychical forces between the molecules. Increasing the surface tension will increase the amount of energy (heat) needed to take the molecules apart and go from liquid state to vapor state, so the boiling point of the particular liquid will increase.
Answer:
Explanation:
Use the ideal gas equation:
Where:
- p is the pressure: 202.6kPa
- n is the number of moles: 0.050 mol
- T is the temperatue in absolute scale: 400K
- R is the universal constant for ideal gases: 8.314 L-kPa / K-mol
- V is the volume
Substitute and solve for V:
Convert to liters:
The answer is rounded to two significant figures.
Answer:
Mass = 2.12 g
Explanation:
Given data:
Volume of KMnO₄ = 255 mL (255/1000 = 0.255 L)
Molarity = 0.0525 M
Mass in gram = ?
Solution:
First of all we will calculate the number of moles.
<em>Molarity = number of moles of solute / volume in litter</em>
0.0525 M = number of moles of solute / 0.255 L
Number of moles of solute = 0.0525 M ×0.255 L
Number of moles of solute = 0.0134 mol
Mass in gram:
<em>Number of moles = mass/ molar mass</em>
Mass = moles × molar mass
Mass = 0.0134 mol × 158.04 g/mol
Mass = 2.12 g