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[" okay this is what i got and im not sure if i did it right nor do i know if i answered everything the questions wanted so could you help me out please"]
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ANSWER:
C 12*13=156
H 1*18=18
O 16*2=32
156+18+32=206g/mol
200mg=0.2g
0.2g/ 206 g/mol = 9.7 x 10^-4 moles
0.00097 mol = moles of ibuprofen in 1 tablet
6 x 0.00097 moles = 0.00582 moles, or 5.82 x 10^-3 = moles of ibuprofen a day
I didn't use calculator,but it looks correct, except the total doses..
The problem said 4 doses per day (8 pills), or 8*.00097
I agree with Bob Pursley; however, you rounded too soon for moles in one tablet. You have three s.f. in 200 mg, three in 206 g/mol and the calculator shows me 9.7087E-4 for moles in one tablet and that rounds to 9.71E-4 to three s.f. Why not just leave that number of 0.200/206 in your calculator and multiply that by 8 to arrive at the final answer, and make rounding the last thing you do? That way you don't throw away good numbers.
well thank you both that really helped...=D
To determine the number of moles of ibuprofen in one tablet, you need to calculate the molar mass of ibuprofen first. The molar mass is the mass of one mole of a substance, which can be determined by adding up the atomic masses of all the atoms in the formula.
In this case, the formula for ibuprofen is C13H18O2. The atomic masses of carbon (C), hydrogen (H), and oxygen (O) are approximately 12 g/mol, 1 g/mol, and 16 g/mol, respectively. To find the molar mass of ibuprofen:
C: 12 g/mol * 13 atoms = 156 g/mol
H: 1 g/mol * 18 atoms = 18 g/mol
O: 16 g/mol * 2 atoms = 32 g/mol
Adding these values together gives you the molar mass of ibuprofen:
156 g/mol + 18 g/mol + 32 g/mol = 206 g/mol
Now, let's move on to the next step. If you are given that the mass of ibuprofen in one tablet is 200 mg, you need to convert this mass to grams (g) since the molar mass is given in grams:
200 mg = 0.2 g
Next, divide the mass of ibuprofen in grams (0.2 g) by the molar mass of ibuprofen (206 g/mol) to find the number of moles:
0.2 g / 206 g/mol ≈ 0.00097 mol
This means that there are approximately 0.00097 moles of ibuprofen in one tablet.
If you want to find the number of moles of ibuprofen you consume in a day, you need to know how many tablets you take. Let's assume you take 6 tablets a day. Multiply the number of moles of ibuprofen in one tablet (0.00097 mol) by the number of tablets (6):
0.00097 mol * 6 = 0.00582 mol
Therefore, you consume approximately 0.00582 moles of ibuprofen per day or 5.82 x 10^-3 moles.