It is in an incorrect spot i think
Answer:
34.15% is the mass percentage of calcium in the limestone.
Explanation:
Mass of precipitate that is calcium oxalate = 140.2 mg = 0.1402 g
1 mg = 0.001 g
Moles of calcium oxalate = ![\frac{0.1402 g}{128 g/mol}=0.001095 mol](https://tex.z-dn.net/?f=%5Cfrac%7B0.1402%20g%7D%7B128%20g%2Fmol%7D%3D0.001095%20mol)
1 mole of calcium oxalate have 1 mole of calcium atom.
Then 0.001095 moles of calcium oxalate will have 0.001095 moles of calcium atom.
Mass of 0.001095 moles of calcium :
0.001095 mol × 40 g/mol = 0.04381 g
Mass of sample of limestone = 128.3 mg = 0.1283 g
Percentage of calcium in limestone:
![\frac{0.04381 g}{0.1283 g}\times 100=34.15\%](https://tex.z-dn.net/?f=%5Cfrac%7B0.04381%20g%7D%7B0.1283%20g%7D%5Ctimes%20100%3D34.15%5C%25)
34.15% is the mass percentage of calcium in the limestone.
Answer:
Lymphocytes
Explanation:
Pathogens are particles that make you sick like bacteria, viruses, amoebas. Water is essential for life but that's for metabolism, not fighting off against infection or viruses.
Answer: They lose them :)
Explanation:
We call it a solid because it has the () and in s inside of it meaning solid