Answer: The given statement is false.
Explanation:
A property than can be measured and that is sometimes visible in nature is known as physical property.
For example, boiling point, mass, density, volume etc are all physical properties.
So, when we increase concentration of components in a solution then there will be increase in mass and volume of solution. As a result, there will be change in density also occurs as density is mass present in per unit volume.
Hence, we can conclude that the given statement physical properties of a solution are not affected by the concentration of the components, is false.
Explanation:
A chemical reaction equation that contains same number of atoms on both reactant and product side is known as a balanced chemical reaction equation.
And, when positive and negative ions of the two reactant species exchange their position then this type of reaction is known as double replacement reaction.
For example,
Here, number of reactant molecules are as follows.
K = 1
OH = 1
Pb = 1
= 2
Number of product molecules are as follows.
K = 1
OH = 2
Pb = 1
= 1
Hence, to balance this equation multiply KOH by 2 on reactant side and multiply by 2 on product side.
Therefore, the balanced chemical reaction equation is as follows.
Since, both positive and negative ions on the reactant side get exchanged. Hence, it is a double replacement reaction.
(2) hydrogen carbonate (4) oxalate
Answer: The correct option is 2.
Explanation: Polyatomic ions are defined as the ions in which two or more elements are covalently bonded to act as a single unit. They always carry some charge.
Examples of polyatomic ions are: known as hydroxide ion, known as sulfate ion
We are given a compound having 2 ions which are and . these ions are named as sodium ions and hydrogen carbonate ions.
Therefore, the correct option is 2.
The symbol for the compound dinitrogen trisulfide is N2S3. It is derived from the number of nitrogen and sulfur atoms present in the compound.
The chemical compound dinitrogen trisulfide is composed of two elements: nitrogen (N) and sulfur (S). When we name the compound according to IUPAC nomenclature rules, we consider the number of each type of atom present. Dinitrogen means there are two nitrogen atoms, represented by the subscript 2, and trisulfide implies that there are three sulfur atoms, signified by the subscript 3. Hence, the symbol or chemical formula for dinitrogen trisulfide is N2S3.
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Answer : The initial temperature of gas would be, 269.7 K
Explanation :
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
where,
= initial pressure of gas = 0.723 atm
= final pressure of gas = 0.612 atm
= initial volume of gas = 13.5 L
= final volume of gas = 17.8 L
= initial temperature of gas = ?
= final temperature of gas =
Now put all the given values in the above equation, we get:
Thus, the initial temperature of gas would be, 269.7 K
responsible for making proteins for repair and
growth.