Answer: A. the variable that is changed on purpose in an experiment.
STP means standard temperature and pressure which is equivalent to 273 K and 1 atm, respectively. Assuming ideal gas behavior, the solution for this problem is as follows:
PV = nRT
Solve for n,
n = RT/PV
n = (0.0821 L-atm/mol-K)(273 K)/(1 atm)(1×10⁵ L)
<em>n = 2.24×10⁻⁴ moles</em>
Answer:
An atom cannot be subdivided into smaller particles. (Option A).
Explanation:
According to Dalton's atomic theory: All matter is composed of tiny particles called as atoms. Some postulates of this theory are given below:
1) An atom cannot be subdivided into smaller particles it means they are indivisible.
2) Different element atoms have different masses, and chemical properties.
3) All atoms which are present in an element are identical in all respects such as mass, chemical properties, etc.
4) Atom cannot create or destroyed in a closed system.
5) The types of atoms, and relative number are constant in a given compound.
Answer: light, chlorophyll,
Explanation:
Light energy drives the synthesis of carbohydrates from corbondioxide and water with the generation of oxygen. Meanwhile chlorophyll helps in the capturing of this light energy.
Chemistry voltaic and electrolytic cell help?
Give the sign of the electrodes and the reaction that occurs at each for both voltaic and electrolytic cells. Yes this is homework, but I'm not...
Update:
and what does the question mean by "the sign of the electrodes"?
3 answers · Chemistry
Best Answer
In a voltaic cell (one that happens spontaneously), electrons flow from a negative electrode to a positive electrode (anode ==> cathode). The reaction that happens is a redox reaction where the anode is oxidized (goes from a solid to an ion) and the cathode is reduced (going from an ion to a solid).