Element A combines with element B in the ratio 9:5 by mass. In a different experiment, it is found that 1 g of B reacts with 1.8 g of A. Does this support the law of definite proportions?
- print Print
- list Cite
Expert Answers
briefcaseCollege Lecturer, Professional Researcher
calendarEducator since 2012
write164 answers
starTop subjects are Science, Social Sciences, and Law and Politics
This Law of Definite Proportion is also known as Law of Constant Composition, This law states that the relative amount of each element in a specific compound is always the same or it can also be defined as a compound always contain the same proportion by mass of its constituent element.
From the question, element A and B combines in the ratio of 9:5 which means 9 grams of A react with 5 grams of B. If 1 gram of B is reacting, then 1.8 grams of A is required which is in the ratio of 9:5. Thus defines the Law of Definite Propotion.
Related Questions
- Calcium reacts with water as shown. Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g) What is the total...
- 1 Educator Answer
- How can a chemist predict how an element can combine with other elements?
- 1 Educator Answer
- Sulfur forms two compounds with fluorine, T and U. Compound T has 0.447 g of sulfur combined with...
- 1 Educator Answer
- 0.250 g of an element, M, reacts with excess fluorine to produce 0.547 g of the hexafluoride,...
- 1 Educator Answer
- Calculate the molar mass of a compound if 0.472 mole of it has a mass of 178 g.
- 1 Educator Answer
calendarEducator since 2010
write1,405 answers
starTop subjects are Science, Math, and Social Sciences
These results do support the law of definite proportions. We know that A combines with B in a ratio of 9:5 by mass. If we divide 9 by 5 we get 1.8, so this ratio reduces to 1.8:1. This corresponds exactly with the second observation that 1.8 g of A reacts with 1.0 g of B, this giving a mass ratio of 1.8:1. This is the exact same mass ratio as before. The law of definite proportions states that a compound always exists as set proportions of each element to each other by mass. Since A and B combine in a constant mass ratio of 1.8:1, these observations uphold the law of definite proportions.