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Jobisdone [24]
3 years ago
9

The law of constant composition states: All atoms of a given element have a constant composition and are different than atoms of

any other element.
A. The nucleus is a dense region of positive charge that always contains protons and neutrons.
B. Matter cannot be either created or destroyed in a chemical reaction.
C. All samples of a given compound have the same proportions of their constituent elements.
D. none of the above
Chemistry
1 answer:
Airida [17]3 years ago
7 0

Answer:

C

Explanation:

The law proves C. For examples no matter how water you have it will always have a 1:2 ratio of oxygen to hydrogen. :)

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Earth is heated . . .

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All single-displacement reactions can be classified as another type of reaction as well. What type of reaction is that?
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combustion because one atom in wrong place will make it combust

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Solid iron(II) sulfide reacts with aqueous hydrochloric acid HCl to produce hydrogen sulfide gas H2S and aqueous iron(II) chlori
Marina CMI [18]

Answer:

<h2> 2 HCl(aq) + FeS(s) --->  FeCl_{2(aq) +H_{2}S(g)</h2>

Explanation:

Here translate the words into the atomic symbol:

HCl(aq) + FeS(s) →FeCl2(aq) + H2S(g)

calculation;  

Hydrogens (H); 1 on left, 2 on right

Chloride (Cl);  1 on left, 2 on right

Iron (Fe) ; 1 on left, 1 on right

Sulfur (s);  1 on left, 1 on right

Balancing ; So, need 1 more Hydrogen on the left and 1 more Chloride on the left.  The easiest way to do this is to put a 2 in front of HCl.  

<em>2 HCl(aq) + FeS(s) --->   </em>FeCl_{2(aq) +H_{2}S(g)

Now there are two hydrogens, two chlorides, one iron, and one sulfur on the left and the same on the right.

5 0
4 years ago
A student is conducting a lab investing solutions. The student starts by adding a set amount of sugar to water. After stirring,
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Sugar dissolves in water because intermolecular connections between the slightly polar sucrose molecules and the polar water molecules release energy.

The energy required to destabilize the structure of both the pure solute and solvent is made up for by the weak bonds that develop between the solute and the solvent. The sugar molecules occupy the space between the water molecules when the sugar dissolves in the liquid. They therefore don't take up any additional space. So the solution's volume stays the same. Because hot water has more energy than cold water, sugar dissolves more quickly in hot water than it does in cold water. When water is heated, the molecules become more energetic and travel more quickly.

Learn more about molecules here-

brainly.com/question/26933336

#SPJ4

8 0
1 year ago
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