A: The rate of formation of R is one-half the rate of the disappearance of Z.
B: The rate of disappearance of Z is one-fourth of the rate of disappearance of X.
C: The rate of formation of R is double the rate of formation of S.
D: The rate of formation of S is double the rate of disappearance of X.
B: The rate of disappearance of Z is one-fourth of the rate of disappearance of X
Because as x -> 0, 4->0
z-> 0, 1->0
B. Ag
C. Au
D. Si
Answer:
92.1
Explanation:
1.57 * 58.69
Answer:
That is balanced.
Explanation:
b)it involves heating charcoal to high tempuratures
c)it involves drawing copper into long wires
d)it involves breaking molecular bonds between copper compounds
The correct answer is D:
it involves breaking molecular bonds between copper compounds .
The explanation :
-when we melt a copper it is a physical change because the substance is still copper and have the same shape.
- but for example Burning a copper it is a chemical change. Fire activates a chemical reaction between copper and oxygen.
-The oxygen in the air reacts with the copper and the chemical bonds are broken.
- the chemical change is changing the other compound bonded to the copper atoms.
So, the correct answer is D