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ad-work [718]
2 years ago
13

5. Which of the following statements is incorrect?

Chemistry
1 answer:
Vikki [24]2 years ago
6 0

Answer:

c- dry cells can not be recharged

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How are acids and bases used by humans
azamat
We use acids and bases in everyday life for cooking and cleaning
6 0
3 years ago
An empty beaker has a mass of 75.0. Salt is added to the beaker until it has a total mass of 108.06 g. Using the
anastassius [24]

Answer:

33.1

Explanation:

i just took the test

5 0
1 year ago
Hich of the following is an oxidation-reduction reaction?
KiRa [710]

The oxidation-reduction reaction from the reactions above is

ZnS(s) + 2O2(g) ------ ZnSO4(s)

<h3>What is redox reactions?</h3>

Oxidation-reduction or redox reaction is the type of chemical reaction in which oxidation states of substrate changes

So therefore, the oxidation-reduction reaction from the reactions above is

ZnS(s) + 2O2(g) ------ ZnSO4(s)

Learn more about oxidation-reduction reactions:

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6 0
2 years ago
How is carbon monoxide formed in a car engine?
alexdok [17]
Carbon monoxide is produced in an engine when incomplete combustion happened. In a combustion engine intake valve, it combines the fuel and air (nitrogen and oxygen) and when spark plug ignites it pushes the piston downwards. After that piston will push itself upward and pushes the air that was generated by the combination of those components in the exhaust valve. This is a repeated cycle which keeps the engine running. In a perfect combustion process the air being released are carbon dioxide, water and nitrogen. But when an incorrect ratio of the combination of fuel and air in the engine is processed, carbon monoxide is being generated.



3 0
3 years ago
How much heat is required to change 25.0 g of water from solid to liquid at 0 oC? Water: ΔHfus = 334 J/g; ΔHvap= 2260J/g
xxMikexx [17]

Answer:

The heat required to change 25.0 g of water from solid ice to liquid water at 0°C  is 8350 J

Explanation:

The parameters given are

The temperature of the solid water = 0°C

The heat of fusion,   = 334 J/g

The heat of vaporization, = 2260 J/g

Mass of the solid water = 25.0 g

We note that the heat required to change a solid to a liquid is the heat of fusion, from which we have the formula for heat fusion is given as follows;

ΔH =  m ×

Therefore, we have;

ΔH =  25 g × 334 J/g = 8350 J

Which gives the heat required to change 25.0 g of water from solid ice to liquid water at 0°C  as 8350 J.

3 0
3 years ago
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