<span><span>Iron, Wrought 1482 - 1593- 2900</span><span>Iron, Gray Cast1127 - 1204 - 2200</span><span>Iron, Ductile1149</span></span>
Answer:

Explanation:
<u>1. Convert Grams to Moles</u>
Use the molar mass (found on the Periodic Table) to convert from grams to moles.
Use this value as a ratio.

Multiply by the given number of grams.

Flip the ratio so the grams of boron cancel out.



<u>2. Convert Moles to Atoms</u>
We use Avogadro's Number, 6.02*10²³: the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, the particles are atoms of boron.

Multiply by the number of moles we calculated.

The moles of boron cancel.


The original value of grams has 4 significant figures, so our answer should have the same. For the number we calculated, that is the thousandth place.

The 6 tells us to round the 2 to a 3.

25.00 grams of boron is equal to 1.393*10²⁴ atoms.
Lipids and <span>They belong in class amphibia or known as amphibians Amphibians they fall into amphibians It is an amphibian in the Anura family amphibian</span>