<span>Hydrogen bonding between water molecules is the foundation of multiple properties of water such as cohesion, adhesion, surface tension, water's high specific heat, three states, and low freezing point which all contribute to water sustaining life. The three states of water coupled with the low freezing point allows organisms living in aquatic systems in cold climates to be protected from the freezing air temperatures by the layer of ice that forms across the surface of lakes and rivers. The high specific heat of water allows it to be a wonderful cooling agent for people, the water molecules can absorb large quantities of heat before evaporating of our skin when we sweat carrying the heat away as well. The cohesion and adhesion properties of water allow the tips of the tallest trees in the Amazon and Sequoia National Park to still receive water.</span>
Answer:
This is a correct answer. 2HCL + Fe = FeCl2 + H2
The simplest ratio of elements in a molecule is called as Empirical Formula.
For Example,
Empirical formula of Benzene is CH
Empirical formula of Formaldehyde is CH₂O
Calculation of Empirical Formula:
Empirical formula can be calculated from Molecular formula by dividing the molecular formula with such number that all number of elements in molecular formula gets the lowest and simplest number.
Like Benzene Molecular formula is C₆H₆, when it is divided by 6 we get C₁H₁ or simply CH.
So, for acetic acid having molecular formula C₂H₄O₂ we can only divide it with 2 to have the simplest form, i.e.
C₂H₄O₂ ÷ 2 = C₁H₂O₁ or CH₂O
Result:
So the ratio of elements in acetic acid is
C : H : O
1 : 2 : 1
I don’t want to be wrong but I’m gonna say 2p
Answer:
This experiment is uncontrolled because two different masses of substance A are used.
Explanation:
A controlled experiment is a structured experiment aimed at testing a particular observation or observations. The setup of a controlled experiment helps to determine the reason why a particular observation occurs and what must have led to it.
In the experiment highlighted above, different masses of a substance were used, they were heated to different temperatures. The set up does not show any correlation between the masses of substances heated and the temperatures. It is even difficult to try to predict the hypothesis for this kind of experimental set up. All the variables in play can best be assumed to be independent of one another.