Compound is formed when two or more chemical elements are chemically bonded together. elements are made of atoms
Answer:
A. it is the lowest at low temperatures
Explanation:
It is true with respect to the kinetic energy of a molecule that the it is the lowest at low temperatures.
The kinetic energy of a molecule is the energy due to the motion of the particles within a substance.
- Kinetic energy is directly proportional to the temperature of a substance.
- The higher the temperature, the more the kinetic energy of the molecules within a system.
- At low temperature, kinetic energy is the lowest.
- At the highest temperature, kinetic energy is the highest
Answer:
4.00 is the pH of the mixture
Explanation:
The ethyl amine reacts with HNO3 as follows:
C2H5NH2 + HNO3 → C2H5NH3⁺ + NO3⁻
To solve this question we need to find the moles of ethyl amine and the moles of HNO3:
<em>Moles C2H5NH2:</em>
0.0500L * (0.100mol/L) = 0.00500 moles ethyl amine
<em>Moles HNO3:</em>
0.201L * (0.025mol/L) = 0.005025 moles HNO3
That means HNO3 is in excess. The moles in excess are:
0.005025 moles HNO3 - 0.00500 moles ethyl amine =
2.5x10⁻⁵ moles HNO₃
In 50 + 201mL = 251mL = 0.251L:
2.5x10⁻⁵ moles HNO₃ / 0.251L = 9.96x10⁻⁵M = [H+]
As pH = -log [H+]
pH = -log 9.96x10⁻⁵M
pH = 4.00 is the pH of the mixture
Answer: The partial pressure of 
is 1.86 atm
Explanation:
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as 
The given balanced equilibrium reaction is,
Pressure at eqm. 0.973 atm 0.548atm x atm
The expression for equilibrium constant for this reaction will be,
Now put all the given values in this expression, we get :
By solving the term 'x', we get :
x = 1.86 atm
Thus, the partial pressure of is 1.86 atm
Answer:
<u></u>
- <u>Scientifically speaking, living things are alive because they have complex systems that allow them to be born, grow, reproduce and, when systems fail, die.</u>
Explanation:
The translation of the question is:
- why is a living being alive?
<h2>Solution</h2>
Answering from a scientific point of view, not a philoshophical one, a <em>living </em>organism is differentiated from a non-living entity in that the <em>living being</em> is born, grows, has the ability to reproduce and dies.
All that is possible because the living beings posses a complex network of systems that sustain their life.
Those systems include the homeosthasis, the metabolism, the answer to external stimulus, the ability of adaptation, the development (growing) and the reproduction.
To be considered a living being the organism must count wiht all those systems.
It is important that you know that viruses are not living organisms: they are chemical molecules which do not have metabolism and do not grow.
