Question
1. Find the number of atoms of phosphorus (P) in 3,44 moles of phosphorus. 2. What is the mass of 0.38 moles of cobalt (Co)? 3. How many moles of nickel (Ni) is 3.88times 10^25 atoms of nickel? 4. How many atoms is 3.75 moles of iron (Fe)? 5. Find the number of moles of sodium (Na)in 145 g of sodium. 6. How many moles is 0.55 g of magnesium (Mg) 7. If you have 7.22times 10^23 atoms of chromium (Cr) how many moles of chromium do you have? 8. What mass of tungsten (W) is 35 moles of tungsten? 9. How many atoms is 5.2 moles of titanium (Ti)
Answer
4.5
(189 Votes)
Jade
Professional · Tutor for 6 years
Answer
## Question 1: Number of atoms in 3.44 moles of phosphorus (P) =
=
atoms## Question 2: Mass of 0.38 moles of cobalt (Co) =
g/mol = 22.39 g## Question 3: Number of moles in
atoms of nickel (Ni) =
= 64.45 moles## Question 4: Number of atoms in 3.75 moles of iron (Fe) =
=
atoms## Question 5: Number of moles in 145 g of sodium (Na) =
= 6.31 moles## Question 6: Number of moles in 0.55 g of magnesium (Mg) =
= 0.023 moles## Question 7: Number of moles in
atoms of chromium (Cr) =
= 1.20 moles## Question 8: Mass of 35 moles of tungsten (W) =
g/mol = 6434.4 g## Question 9: Number of atoms in 5.2 moles of titanium (Ti) =
=
atoms
Explanation
## Step 1: For questions involving the conversion of moles to atoms or atoms to moles, we use Avogadro's number
atoms/mole. ## Step 2: For questions involving the conversion of moles to mass or mass to moles, we use the molar mass of the element in question. ## Step 3: Perform the necessary calculations using the appropriate conversion factors.