I looked up how to solve it but my answer is coming out wrong. I don't know what i'm doing wrong please help!.Now if your lab partner determined that there were 4.030 x 1020 atoms of H in an unknown sample of C2H4Cl2, how many milligrams would the unknown sample weigh?
Thanks, Bella :)
To determine the weight of the unknown sample, we need to convert the number of atoms of hydrogen (H) to the weight of the sample. Here's a step-by-step process to solve this problem:
1. Find the molar mass of C2H4Cl2:
- Carbon (C) has a molar mass of 12.01 g/mol.
- Hydrogen (H) has a molar mass of 1.008 g/mol.
- Chlorine (Cl) has a molar mass of 35.45 g/mol.
Calculate the molar mass of C2H4Cl2 by adding the molar masses of each element:
Molar mass of C2H4Cl2 = (2 * molar mass of C) + (4 * molar mass of H) + (2 * molar mass of Cl)
2. Convert the given number of atoms of hydrogen (H) to moles of hydrogen:
The Avogadro's number states that 1 mole of any substance contains 6.022 x 10^23 particles.
- Divide the number of atoms of hydrogen (4.030 x 10^20 atoms) by the Avogadro's number to get the number of moles of hydrogen.
3. Use the molar mass of C2H4Cl2 to convert moles of hydrogen to grams:
- Multiply the number of moles of hydrogen by the molar mass of C2H4Cl2 to get the mass of hydrogen in grams.
4. Convert grams to milligrams:
- Multiply the mass of hydrogen in grams by 1000 to convert it to milligrams.
By following these steps, you should be able to calculate the weight of the unknown sample in milligrams. If you have specific numbers or calculations that you think might be incorrect, please provide them so that I can help you further with your problem.