Multiple Choice
The Greek letter delta (Δ) may be written over the reaction arrow in a chemical equation to indicate that ________.
A) heat is generated when the reaction occurs
B) a catalyst is needed for the reaction to occur
C) water is needed for the reaction to occur
D) heat is needed for the reaction to occur
Correct Answer:

Verified
Correct Answer:
Verified
Q87: The chemical equation: KClO<sub>3</sub>(s)→ KCl(s)+ O<sub>2</sub>(g)is not
Q88: Which sample contains the largest number of
Q89: The balanced reaction: 4 NO<sub>2</sub> + O<sub>2</sub>
Q90: What are the two half reactions that
Q91: How many carbon atoms are in 77.28
Q93: Beaker A contains 1 mole of iron
Q94: A chemical equation is balanced by adding
Q95: In the reaction: Ni<sup>2+</sup>(aq)+ Mg(s)→ Ni(s)+ Mg<sup>2+</sup>(aq),the
Q96: The molecules A and B react according
Q97: Assume that the mixture of substances in