Answer:
Jane has 2.77 * 10^20 molecules cholesterol in 1 dL of blood
Explanation:
<u>Step 1:</u> Given data
Molar mass of Cholesterol = 386.654 g/mol
Jane has a cholesterol of 178 mg/dL
<u>Step 2:</u> Calculate mass of cholsterol in 1 dL
178 mg/dL means in 1 dL she has 178 mg cholesterol or 0.178 grams
<u>Step 3</u>: Calculate number of moles of cholesterol
Number of moles = mass of cholesterol / molar mass of cholesterol
Number of moles = 0.178 grams / 386.654 g/mol = 4.6 * 10^-4 moles
<u>Step 4: </u>Calculate number of molecules
Number of molecules = 4.6 * 10^-4 mol * 6.022 *10^23 / mol = 2.77 * 10^20 molecules
Jane has 2.77 * 10^20 molecules cholesterol in 1 dL of blood
Answer: Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities, and is the primary interaction occurring in ionic compounds.
Explanation:
Answer:
1500 mmol.
Explanation:
Hello,
In this case, for such monovalent potassium species, we can verify that 1 mEq equals 1 mmol, therefore, the required solution is shown below:
Which means that also 1500 mmol of monovalent potassium ions are contained in the liter.
Regards.
Answer:
I promise it is the 2nd one
Explanation:
The following diagram shows a stage of a cell during mitosis. <u>Two identical circles are joined in the middle</u> and they have the nucleolus inside the nucleus in the center of the circles.