I really need help in Chemistry, it's killing me I don't know how to do these dimensional analysis because I don't know which formulas to use for what!!
Here are the questions asked. I'm not asking for all the answers I just want some sense of direction of what to use when
1. How many atoms are there in 3.7 moles of aluminum atoms?
2. How many atoms are there in 7.8 moles of uranium?
3. How many atoms are there in 5.8 moles of carbon tetrachloride?
4. How much does 3.7 moles of aluminum weigh?
5. How much does 7.8 moles of uranium weigh?
6. How much does 5.8 moles of carbon tetrachloride weigh?
7. If I have 526 grams of uranium then how many atoms of uranium do I have?
8. If I have 248 grams of carbon tetrachloride then how many atoms of it do I have?
Here are the questions asked. I'm not asking for all the answers I just want some sense of direction of what to use when
1. How many atoms are there in 3.7 moles of aluminum atoms?
2. How many atoms are there in 7.8 moles of uranium?
3. How many atoms are there in 5.8 moles of carbon tetrachloride?
4. How much does 3.7 moles of aluminum weigh?
5. How much does 7.8 moles of uranium weigh?
6. How much does 5.8 moles of carbon tetrachloride weigh?
7. If I have 526 grams of uranium then how many atoms of uranium do I have?
8. If I have 248 grams of carbon tetrachloride then how many atoms of it do I have?
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When you want to get the number of atoms from moles, use avogadro's number (6.022 x 10^23).
ex.: 3.7 moles of aluminum x 6.022x 10^23 atoms/ 1 mole of aluminum.
When solving for mass, use molar mass of the substance.
ex.: 3.7 mol of al x 26.98 grams/ 1 mol of al
For 7&8, convert the grams to moles then use avogadro's number to find number of atoms.
ex.: 3.7 moles of aluminum x 6.022x 10^23 atoms/ 1 mole of aluminum.
When solving for mass, use molar mass of the substance.
ex.: 3.7 mol of al x 26.98 grams/ 1 mol of al
For 7&8, convert the grams to moles then use avogadro's number to find number of atoms.