The possibility of metals replacing each other is dependent on the relative positions of the metals in the activity series.
The activity series is an arrangement of elements in order of decreasing reactivity. The elements that are higher in the series can displace the elements that are lower in the series.
Before we make a decision in each case, we must consider what metal is lower or higher in the series;
- Between Na and K, Na is lower in the series so the answer is no
- Between Co and Cu, Co is higher than Cu in the series so the answer is yes
- Since Zn and Zn^2+ are just a specie and its ion, the answer is no.
- Since Ba is higher than Ni, Ni can not replace Ba so the answer is no
Learn more: brainly.com/question/24058474
Answer: The adult stage for one-celled organisms is usually extremely long.
Explanation:
The first one is false, I'm no expert, but I'm pretty sure that there is some yeast that don't produce spores, even in normal conditions.
The third is false, Algae can be unicellular <em>and </em>multicellular.
The fourth is false, All the Algae in the world is close to <em>half</em> of the ogygen in the world.
So that leaves the second, The adult stage is usually long for one-celled organisms.
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Answer:
9.6 mol
Explanation:
Start by writing out the balanced equation of the reaction.
2
+ 
⇒ 2
Here you will see 2 mol of hydrogen for every 1 mol of oxygen. Using this ratio, you can assume the amount of hydrogen will always be double that of oxygen. In this case, 4.8 * 2 = 9.6
