Most of toothpastes<span> includes sodium fluoride,silica,sodium lauryl phosphate,sorbitol,water etc. It may neutralise the acid formation in mouth cavity as well as at teeth gaps.So tooth paste is basic in nature.</span>
Enthalpy heat of vaporization is the measurement of heat required to convert an amount of substance from the liquid to the gas phase.
The answer is b. hot spots
The rms speed of a gas can be calculated using the following rule:
Vrms = sqrt[(3RT) / M] where
R is the gas constant = 8.314 <span>J K^−1 mol^−1
T is the temperature = 32.5 + 273 = 305.5 degree kelvin
M is the molar mass = 2*14 = 28 grams = 0.028 kg
Substitute with the givens in the equation to get the rms speed as follows:
Vrms = sqrt [(3*8.314*305.5) / 0.028]
Vrms = 521.665 m/sec</span>
