Identify the CORRECT statement of the following,
1) Equal volume of any gases will contain equal number of gas molecules at
same temperature & pressure
2) During the course of chemical reaction mass is conserved.
3) percentage composition of pure substance will be the same irrespective of
its source.
4) Empirical Formula of glucose is CH2O
1,2,3 & 4 are correct
Only 1, 2 & 3are correct
Only 1 & 2 are correct
Only 1 & 3 are correct
Answers
Answer:
Explanation:
1.The law is named after Amedeo Avogadro who, in 1812, hypothesized that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules.
2.The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
3.A pure substance has a constant composition. All specimens of a pure substance have exactly the same makeup and properties. Any sample of sucrose (table sugar) consists of 42.1% carbon, 6.5% hydrogen, and 51.4% oxygen by mass.
4.An empirical formula is a formula that shows the elements in a compound in their lowest whole-number ratio. Glucose is an important simple sugar that cells use as their primary source of energy. Its molecular formula is C6H12O6. Since each of the subscripts is divisible by 6, the empirical formula for glucose is CH2O.
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