Answer:
there are approximately 3996 milligrams in 6.020x10^23 formula units of helium.
Explanation:
To determine the number of milligrams in 6.020x10^23 formula units of helium, we need to know the molar mass of helium.
The molar mass of an element is the mass of one mole of that element. In the case of helium (He), the molar mass is approximately 4 grams per mole (g/mol).
To convert from moles to milligrams, we need to multiply the number of moles by the molar mass and then convert grams to milligrams. Here's how to do it step-by-step:
1. Calculate the number of moles of helium:
- Divide the given number of formula units (6.020x10^23) by Avogadro's number (6.022x10^23).
- This gives us the number of moles of helium.
2. Calculate the mass of helium in grams:
- Multiply the number of moles by the molar mass of helium (4 g/mol).
- This gives us the mass of helium in grams.
3. Convert grams to milligrams:
- Multiply the mass in grams by 1000 to convert to milligrams.
- This gives us the mass of helium in milligrams.
Let's do the calculations:
1. Number of moles of helium:
6.020x10^23 / 6.022x10^23 = 0.999 mole (approximately)
2. Mass of helium in grams:
0.999 mole * 4 g/mol = 3.996 grams (approximately)
3. Mass of helium in milligrams:
3.996 grams * 1000 = 3996 milligrams (approximately)