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3 years ago

What is the relationship between synthesis and decomposition reactions?

1 answer:

6 0

They are reverse processes. Synthesis is combining one or more element/compound to form a new one. e.g photosynthesis
Decomposition is the opposite of that. It's when an element/ compound decomposes into it's component elements or simpler compounds
e.g 2H2O (l) --> 2H2 (g) + O2 (g)

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The PC modem was invented in what year?

Andrew [12]

Answer:

1977

Explanation:

Getting connected: a history of modems. Then, in 1977, Dale Heatherington and Dennis Hayes created the world's first PC modem, the 80-103A.

5 0

3 years ago

If air is a fluid, why do we not include the buoyant force caused by the displacement of air by the objects in this experiment?

uysha [10]

Archimedes' principle allows us to find that the reasons why the thrust is not written when a body is in the air is:

The thrust of air is about 800 times less than the thrust of a fluid

In general the other forces (weight, tension) are much greater than thrust

Archimedes' principle establishes that the thrust is equal to the weight of the dislodged liquid (fluid)

B = ρ g V

Where B is the thrust, ρ and V the density and volume of the fluid, respectively, g the acceleration due to gravity.

In the attachment you have a diagram of a system in equilibrium in air and water, we can see that in the two cases for a system in equilibrium

B -W = 0

B = W

Let's find the value of the thrust in each case and compare

$B_{air} = \rho_{air} g V_{air}$

$B_{water} = \rho_{water} \ g V_{water}$

Used the density

$\rho_{air} = \ 1.26 \ kg/m^3 \\\rho_{water} = 997 kg/m^3$

$B_{air} = 1.26 \ g \ V_{air}\\B_{water} = 997 \ g \ V_{water}$

Suppose that the volume of the two bodies is the same

$B_{water} = 792 B_{air}$ r

We can see that the thrust in air or other gas is about 800 times less than the thrust in liquids. This is the reason that in many problems the thrust is not written when the body is in the air.

In conclusion, using Archimedes' principle, we find that the reason why the healed thrust is not written for a body is in the air is:

The thrust of air is about 800 times less than the thrust of a fluid

In general the other forces (weight, tension) are much greater than thrust

Learn more about Archimedes' principle here:

brainly.com/question/787619

5 0

2 years ago

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natima [27]

It should be C but not sure

7 0

3 years ago

List the number of each type of atom on the right side of the equation hbr(aq)+2naoh(aq)→2nabr(s)+h2o(l)

ser-zykov [4K]

On the basis of the given unbalanced equation, that is:

HBr (aq) + 2NaOH (aq) → 2NaBr (s) + H2O (l)

On the right side of the equation, there are 2 atoms of sodium (Na), 2 atoms of bromine (Br), 2 atoms of hydrogen (H), and 1 atom of oxygen (O₂).

After balancing the equation correctly we get:

HBr (aq) + NaOH (aq) → NaBr (s) + H2O (l)

On the right side, one atom of Na, 1 atom of Br, 1 atom of H and one atom of O₂.

5 0

3 years ago

Read 2 more answers

Hamid made this table to organize his notes on the properties of acids and bases.

Molodets [167]

Answer : The property in the wrong column is, base form hydrogen gas with metals

Explanation :

Acid : It is a substance that has ability of donating a proton or hydrogen ion, $H^+$ .

The properties of an acid are :

Acids are sour in taste.
It conduct electricity.
The texture of an acid solution is sticky.
It react with carbonates to give salt.
It changes the color of the litmus paper to red.
It react with a metal to give compound and hydrogen gas.

Base : It is a substance that has ability of donating hydroxide ion, $OH^-$ .

The properties of an base are :

Base are bitter in taste.
It conduct electricity.
The texture of an base solution is slippery.
It changes the color of the litmus paper to blue.
It does not react with a metal.

Hence, from the above information, we conclude that the property in the wrong column is, base form hydrogen gas with metals .

8 0

3 years ago

Read 2 more answers