Class9_Science_Atoms and Molecules
In any chemical reaction, the total mass of the substance before and after the reaction is the same although its matter undergoes a physical change.
"In a chemical substance the elements are always present in definite proportions by mass".
Law of Multiple Proportions
When two elements combine to form different compounds, then the weight of one is constant and the other has a simple ratio.
"In a chemical substance the elements are always present in definite proportions by mass".
Law of Multiple Proportions
When two elements combine to form different compounds, then the weight of one is constant and the other has a simple ratio.
Today's Devotional
A Prayer of Comfort for Families Missing Their Fallen Military Heroes - Your Daily Prayer - May 27
Because the general public views them as fallen heroes deserving of patriotic honor, many may mistakenly think that this somehow helps to soften the blow of the loss to their family members. But for many families, it can be extremely difficult to accept and process, especially because their passing is without warning, unexpected, and with no opportunity to say goodbye.
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