Answer:
Core electrons are the electrons in an atom that are not valence electrons and therefore do not participate in bonding. The number of valence electrons of an element can be determined by the periodic table group of the element
Explanation:
An example of a heterogeneous catalyst is a catalytic converter. A catalytic converter is an emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction (oxydation or reduction).
A. Heat is released, so the reaction is <u>exothermic</u>.
B. Heat is absorbed, so the reaction is <u>endothermic</u>.
C. Heat is released, so the reaction is <u>exothermic</u>.
First off, we can find the volume that need to be filled:
2-1.25
=0.75L
Asbthe unit is still in Litres,we need to converge it to mL.
1L = 1000mL
mL needed:
=0.75×1000
=750mL
Therefore the answer is 750mL.
Hope it helps!
