The mass number is c number of protons and neutrons in a atom
b. .Silver has a lower activity than hydrogen and cannot replace it
Explanation:
The reaction between silver and water cannot proceed because Ag has a lower activity than hydrogen in water.
H₂O + Ag → no reaction
- This reaction is referred to as as single displacement reaction.
- In this kind of reaction, one specie replaces another.
- The replacement of a metallic ion in solution by a metal atom higher in the activity series is the driving force for this reaction.
- Hydrogen is higher than silver and the activity series and will not be displaced by it.
- Therefore, no reaction will occur.
Learn more:
Electrochemical cells brainly.com/question/10161182
#learnwithBrainly
Answer:
Substance A
Explanation:
A substance that has a higher density than water will sink in water, while that with a lower density than water will float on water.
Substance A, with a lower density of 0.98 g/ml as compared to that of water (1.0 g/ml) will thus float in water.
<u>What is density?</u>
Density is defined as the amount of substance per unit volume. The concept of density is usually one of comparison, which means whether a substance with a particular density value will sink or float will depend on the fluid's density it is placed in.
A higher density means that the substance has a higher mass per unit volume, so it's "heavier" and will thus sink.
<u>Formula</u>
To learn more about density, check out: brainly.com/question/9149928
I think the answer is A. reasoned that the nuclesus was dense and positive and the electrons were negative and orbited the nucleus. Correct me if im wrong. Have a great day/evening :)
This is the answer using hess’ law. you need to make the 3 equations equal the final one