Any substance composed of two or more elements that are chemically combined in a fixed proportion is(1) an isomer (3) a solution
(2) an isotope (4) a compound
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Any substance composed of two or more elements that are chemically combined in a fixed proportion is known as a Compound. Thus, it's D.
What do you mean by Elements?
Elements may be defined as any substance that cannot be disintegrated into more superficial substances by standard chemical processes.
In chemistry, an isomer may be defined as those molecules which the same molecular formulas, but different arrangements of atoms.
An Isotope may be defined as an atom that bears the same atomic number and chemical identities but possesses a different atomic mass.
A solution may be defined as a homogeneous mixture of one or more solutes disbanded in a specific solvent.
Therefore, the correct option for this question is D.
To learn more about Compounds, refer to the link:
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To solve this we use the equation,
M1V1 = M2V2
where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.
2.5 M x V1 = 0.50 M x .100 L
V1 = 0.02 L or 20 mL
Answer:
20 milliliters
Explanation:
I don't cap
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N2H4 = N2 + 4 H+ + 4e-
2 BrO3- + 3 N2H4 = 2 Br- + 3 N2 + 6 H2O
element
compound
atom
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The substance in the glass is a mixture.
Types of a mixture
A mixture is the combination of two or more substances that are not related leading to the formation of either uniformly or unevenly formed solution.
There are two main types of mixture which includes:
- Heterogeneous mixture: These are the type of mixture that are not evenly distributed. Example is the mixture of sand and water.
- Homogeneousmixture: This is the type of mixture that appears evenly or uniformly distributed. Example is mixture of water and salt.
Therefore, the mixture of salt and water is a homogeneous type of mixture.
Learn more about mixtures here:
More specifically a solution which is a homogeneous mixture.
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Answer:
aqueous solutions of silver nitrate and sodium chloride turn cloudy after mixing aqueous solutions of hydrochloric acid and sodium hydrogen carbonate produces bubbles on mixing Sodium hydroxide is mixed with water and the container feels warmer
Explanation:
A chemical change involves the formation of new substances. Also heat is absorbed or released in a chemical change. Another name for a chemical change is a chemical reaction.
In the first case, a reaction of the sort;
AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)
The cloudy solution is due to the formation of AgCl precipitate.
In the second case, a reaction of the sort;
HCl(aq) + NaHCO3(aq) ---> NaCl(aq) + CO2(g) + H2O(l)
The gas evolved is due to the formation of CO2 in the process. Heat is also evolved showing that it is a chemical change.
Answers
To solve this we use the equation,
M1V1 = M2V2
where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.
1.75 M x V1 = 0.100 M x 2.0 L
V1 = -.11 L
Answer : The volume of stock solution is, 0.114 L
Solution :
According to the dilution law,
where,
= molarity of
solution = 0.100 M
= volume of
solution = 2.00 L
= molarity of
stock solution = 1.75 M
= volume of
stock solution = ?
Now put all the given values in the above law, we get the volume of stock solution.
Therefore, the volume of stock solution is, 0.114 L