Answer:
There are 0.34 moles of CO2 in 15 grams of CO2
Explanation:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 mole CO2.
Molar mass of CO2 = Molar mass of Carbon + Molar mass of Oxygen multiplied by 2
Molar mass of carbon = 12 g/mol
Molar mass of oxygen= 16g/mol
Molar mass of CO2= 12g/mol + (16g/mol)2
= 12g/mol +32g/mol= 44g/mol
In other words, we can say that 1 mole of CO2 has a mass of 44gram
Number of moles of CO2 = mass of CO2 / molar mass of CO2
Mass of CO2= 15g/mol
Number of moles of CO2= 15gmol-1 / 44gmol-1
= 0.3409 moles
Hence, there are 0.34moles of CO2 present in 15 grams of CO2.
Answer: 0.34 moles
Explanation:
Chemical changes of matter are related to electronic configuration which is same along a group in case of valence shell in the periodic table.
Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
Learn more about periodic table,here:
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