The scientific investigation performed by Elaina is missing control variables.
An ideal scientific investigation should vary only the factor, which is examined, like the volume of the music, while all the other factors should be kept constant.
She hasn't controlled for volume, the volume of the music may influence the rate at which the heart rate of the listener will elevate, in the case, and she should have determined the pulse rate of each individual after the similar rate of listening.
She hasn't controlled for age, as an older person would have reacted to loud music differently from a teenager, that is, all her subjects should be of about the similar age group.
She hasn't controlled for wakefulness, that is, each individual would react to music distinctly when asleep and when is awake.
All cells are enclosed with a cell membrane. A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport.
8.62 pounds and 20.23 inches
Atoms are the elements in the compounds. Those reacting are called the reactants.
<span>2C6H14 + 19O2
2(6) + 2(14) + 19(2)
= 12 + 28 + 38
= 78 atoms
</span>
The partial pressure (Px) of a gas in a gas mixture is equal to its mole fraction (Xi) multiplied by the total pressure (P) of the gas mixture. That means that we have to calculate the mole fraction of each gas, then calculate its partial pressure. The mole fraction of a gas is its number of moles (n) divided by the total number of moles.
<h3>What is Dalton’s Law?</h3>
Dalton's law of partial pressures is a gas law that states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures exerted by each individual gas in the mixture. The mole fraction of a given gas in a gas mixture is equal to the ratio of the partial pressure of that gas to the total pressure exerted by the gas mixture. This mole fraction can also be used to calculate the total number of moles of constituent gas if the total number of moles of the mixture is known. In addition, the mole fraction can also be used to calculate the volume of a certain gas in a mixtur.
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