Hello!
To solve this question we are going to use the
Avogadro's Number, which tells us how many molecules of a given substance are in a mole. The Avogadro's number is
6,02*10²³ molecules/mol, and we are going to use this value in the following conversion factor:

So, there are 1
,69*10²⁴ molecules of SO₂ in 2,8 moles.
Have a nice day!
Answer:
gravity
Explanation:
Gravity holds the universe together and is a force exerted by any object with mass.
Answer:
f = 1.87 × 10¹⁹ s⁻¹
Explanation:
Given data:
Wavelength of light = 1.6 ×10⁻¹¹ m
Frequency of light = ?
Solution:
Formula:
speed of light = wavelength × frequency
Frequency = speed of light / wavelength
speed of light = 3× 10⁸ m/s
Now we will put the values in formula:
Frequency = speed of light / wavelength
f = 3× 10⁸ m/s / 1.6 ×10⁻¹¹ m
f = 1.87 × 10¹⁹ s⁻¹
That it’s the power house and only hold protons and neutrons.