Recent content by rachelmaddiee

Known: V source = 30.0 V , R1 = 15.0 W, R2 = 15.0 W, R3 = 15.0 W To determine the current, first find the equivalent resistance. I = Vsource/R and R = RA + RB = Vsource/RA + RB 30.0 V/15.0 W + 15.0 W + 15.0 W = 1.5 A This is as far as I could do the work for this question. I’m having trouble..

Step 1 Cation: Fe+3 Anion: O-2 Step 2 Iron has several oxidation numbers. Step 3 Fe3O2 = iron(III) oxide

Here is my work** Can someone please tell me if this is correct? mass = 27.8 g CaCI2 Number of CaCI2 in the compound = (unknown) Number of CI- ions in the compound = (unknown) Number of moles = mass/molar mass To find the number of moles of CaCI2 first you find the molar mass of the compound. 1...

Atoms-to-mass conversion Step 1: First, convert the number of atoms to moles To convert from atoms to moles, divide the atom amount by Avogadro's number (6.02 x 10^23 atoms), or multiply by its reciprocal. Step 2: Then convert moles to grams To convert the moles of a substance to grams, you...

Atoms-to-mass conversion Step 1: First, convert the number of atoms to moles, then convert moles to grams To convert from atoms to moles, divide the atom amount by Avogadro's number (6.02 x 10^23 atoms), or multiply by its reciprocal. Step 2: Second, use the inverse of the Avogadro’s...

But that is the second step? That’s why I’m confused.

So, would I include this too? Atoms-to-mass conversion Step 1: First, convert the number of atoms to moles, then convert moles to grams Step 2: Second, use the inverse of the Avogadro’s number(moles to number of atoms)

Why does it say to use the inverse in my book?

Step 1 To convert from atoms to moles, divide the atom amount by Avogadro's number (6.02 x 10^23 atoms), or multiply by its reciprocal. Step 2 To convert the moles of a substance to grams, you will need to multiply the mole value of the substance by its molar mass. Grams * 1 mole/grams = moles

That’s how it is written in my book

I have to write it out like this example.

Atoms-to-mass conversion Step 1: First, convert the number of atoms to moles, then convert miles to grams Step 2: Second, use the inverse of the Avogadro’s number(moles to number of atoms) Are these the correct steps?

Ground state: [Ar] 4s2 3d6 +2 ion: [Ar] 3d6 +3 ion: [Ar] 3d5 Iron can have multiple oxidation states.

The ion Fe3+, for example, has an oxidation number of +3 because it canacquire three electrons to form a chemical bond, while the oxygen ion O2− has an oxidation number of −2 because it can donate two electrons.