Answer:
B) 2Crº + 6e- --> 2Cr3+
Explanation:
The process of oxidation is where electrons are lost. Thus, out of the 2 ions that change charge(Cr and Cu), we must choose the one where the oxidation number increases(which means electrons are lost). Cr goes from an oxidation number of 0 to an oxidation number of 3+, while Cu goes from an oxidation number of 2+ to 0. Thus, we are looking at the half reaction for Cr. Half reactions never have subtracting electrons, so the answer must be B. I am assuming that last plus should be a -->
Explanation:
This calculator will find the missing variable in the physics equation for force (F = M * a), when two of the variables are known.
Answer:
Poor Science
Explanation:
I took the quiz also just think that doesn't seem like a good, higher level scientist, or popular one, SO THERE YOU GUYS GO!!!
The most common way of preventing bumping is by adding one or two boiling chips to the reaction vessel. However, these alone may not prevent bumping and for this reason it is advisable to boil liquids in a boiling tube, a boiling flask, or an Erlenmeyer flask.
Answer:
The answer is: It remains constant throughout the entire swing.
Explanation:
The "total mechanical energy" refers to the sum of the potential energy and the kinetic energy. When it comes to swinging pendulum, the total mechanical energy refers to the sum of the "gravitational potential energy" and the "kinetic energy."
Remember that the pendulum is "not in free fall" because it is constrained by a string. The tension in the string is being balance by a gravitational force that is acting on it. So, when the pendulum swings (back and forth), the gravitational potential energy and the kinetic energy undergoes a constant exchange of energy. So,<u> this allows the mechanical energy to be conserved.</u>
If friction is present<u>,</u><u> the mechanical energy will then be turned into other forms of energy.</u>