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Usimov [2.4K]
3 years ago
8

Solids are usually more dense than:

Chemistry
2 answers:
MrMuchimi3 years ago
6 0
Solids are usually more dense than liquids and gases. 
Anna35 [415]3 years ago
3 0
Solids are usually more dense than liquids.  There are few cases where solids are less dense than liquids, one being water.  This is why ice floats in water :)
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Answer:

No matter if you are on Earth, the moon or just chilling in space, your mass does not change. But your weight depends on the gravity force; you would weigh less on the moon than on Earth, and in space you would weigh almost nothing at all.

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How are the digestive system and the urinary system similar?
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Explanation:

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10/24/14
vlabodo [156]

Answer:

d = Hydrogen and oxygen are being formed.

Explanation:

When current is passed through the water electrolysis take place.

Water is splitted into hydrogen and oxygen gas. Because of this formation bubbles are formed.

At cathode:

2H₂O + 2e⁻  → H₂ + 2OH⁻

Cathode is negatively charged and reduction take place on it.

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4OH⁻ → O₂ + 2H₂O + 4e⁻

Anode is positively charged and oxidation take place on it.

The over all reaction can be written as:

Chemical equation:

2H₂O  (electricity) →  2H₂  +  O₂

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How do solute concentrations affect the rate of osmosis within the cell?
igor_vitrenko [27]

Answer:

Image result for How do solute concentrations affect the rate of osmosis within the cell?

Concentration gradient - The movement of osmosis is affected by the concentration gradient; the lower the concentration of the solute within a solvent, the faster osmosis will occur in that solvent.

I think this is it^^^

Explanation:

7 0
3 years ago
Solid iron sulfide combines with aqueous hydrogen chloride to form hydrogen sulfide gas and aqueous iron chloride.
KIM [24]

Answer:

<u>Fe2S3 + 6HCl → 3H2S + 2FeCl3 is a double-displacement  reaction</u>

<u />

Explanation:

Step 1: The balanced equation

Fe2S3 + 6HCl → 3H2S + 2FeCl3

Step 2:

<em>Decomposition: </em>This<em> </em>is a reaction in which a compound breaks down into two or more simpler substances. Most decomposition reactions require an input of energy in the form of heat, light, or electricity.

The general form of a decomposition reaction is:    AB→A+B

In our case, <u>this is not a decomposition reaction.</u>

<em>Synthesis</em><em>: This is</em> a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds, while the product is always a compound.

The general form of a decomposition reaction is:  A + B → AB

In our case, <u>this is not a synthesis reaction.</u>

<u />

<u />

Single-displacement reaction: This is a reaction in which one element replaces a similar element in a compound. The general form of a single-replacement (also called single-displacement) reaction is:

A+BC→AC+B

In our case, <u>this is not a single-displacement reaction.</u>

<u />

<u />

Double - displacement reaction: This is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. The general form of a double-replacement (also called double-displacement) reaction is:

AB+CD→AD+B

In this reaction,  A  and  C  are positively-charged cations, while  B  and  D  are negatively-charged anions. Double-replacement reactions generally occur between substances in aqueous solution. In order for a reaction to occur, one of the products is usually a solid precipitate, a gas, or a molecular compound such as water.

In our case: There occurs a duble replacement between Fe^3+ and S^2- with H+ and Cl-.

<u>Fe2S3 + 6HCl → 3H2S + 2FeCl3 is a double-displacement  reaction</u>

<u />

8 0
3 years ago
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