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Natalija [7]
3 years ago
5

Since water can be prepared in the laboratory

Chemistry
1 answer:
Arturiano [62]3 years ago
7 0

Answer:

# In a familiar high-school chemistry demonstration, an instructor first uses electricity to split water into its constituent gases, Hydrogen and Oxygen. Then, by combining the two gases and igniting them with a spark, the instructor changes the gases back into water with a loud pop (That means the energy is released in the process).

# There are new other ways to produce water in laboratory, however, the scientists can not produce water in large quantity for the masses, because of some reasons.

1- Theoretically, this is possible, but it would be an extremely dangerous process. Since Hydrogen is extremely flammable and Oxygen supports combustion, it wouldn’t take much to create this force, but we also have an explosion. That’s why this process can be a deadly one if our experiment is big enough.

2- Personally, I think that it makes no sense to produce water in a laboratory ( or in a large plant) for people to use as daily water. The much more important thing we need to do is to save our environment, our planet Earth. Because the daily water people drink contains not just water molecules but other minerals, the marine life is depend not just in water molecules but diferent factors, etc.

Explanation:

This is just my personal opinion. Hope that can help you a little. Have a nice day

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AlekseyPX
Expected to deal with what? Fires?
5 0
3 years ago
. Act 20 g Ca (M = 40g / mol) with H2SO4 diluted within 10 seconds. What will be the rate of hydrogen formation in mol / sec. pl
11111nata11111 [884]

Answer:

Rate of hydrogen formation is 0.05 mole per second

Explanation:

Firstly, we write the equation of reaction.

When alkali earth metals react with dilute mineral acid, the reaction is vigorous with the production or evolution of hydrogen gas as a result of the displacement of the hydrogen from the acid by the metal. This is one of the basic reactions of mineral acids

Ca + H2SO4 ——> CaSO4 + H2

Looking at the reaction, 1 mole of calcium gave 1 mole of the hydrogen gas

What we do now is to calculate the number of moles of calcium produced by 20g of Ca

Mathematically;

number of moles = mass/atomic mass

number of moles of calcium is thus

20/40 = 0.5 moles

Now, if 1 mole of calcium produced 1 mole of the gas

Definitely, 0.5 mole of calcium will produce 0.5 mole of the gas

So the rate of gas formation would be 0.5/10 = 0.05 mole/second

3 0
3 years ago
The densities of various substances are listed in the chart. All of these substances have the same
Butoxors [25]

Answer:

The object with the greatest density

Explanation:

The object that will have the greatest mass from the given choices is the one with greatest density.

Density is the mass per unit volume of a substance;

  Density = \frac{mass}{volume}  

We can see that density is directly proportional to the mass and inversely proportional to the volume.

The more the mass and the lesser the volume, the higher the density.

So, since the volume is the same, and mass is directly proportional to density, the object having the highest density will have the greatest mass.

6 0
2 years ago
BRAINLIESTT ASAP! PLEASE HELP :)
nexus9112 [7]

Explanation:

<em>First</em><em> </em><em>two</em><em> </em><em>pictures</em><em> </em><em>go</em><em> </em><em>together</em>

From top to bottom, <em>ionisation energy</em> <em>decreases</em><em> </em>[electron shielding], while from left to right, ionisation energy <em>increases</em><em> </em>[valence shell stability]. Noble gases always always possess such high energy of ionisation because they are stable, with Helium having the highest ionisation of all elements.

From top to bottom, <em>electron affinity</em> <em>decreases</em> [decrease in atomic radius], while from left to right, electron affinity <em>increases</em><em> </em>[increase in atomic radius].

There are many more trends, but I have ran out of space, so I will put this in the comments.

I am joyous to assist you anytime.

6 0
3 years ago
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