# chemistry

posted by .

A piece of nickel foil, 0.550 mm thick, 1.25 cm width and 1.00 cm long, is allowed to react with fluorine, F2 to give a nickel fluoride. Density of nickel is 8.908 g/cm3. How many moles of nickel foil were used? If you isolated 1.261 g of nickel fluoride, what is its formula?

This is what I have come up with so far...

V = 0.055 cm x 1.25 x 1.00= 0.0688 cm^3

Mass = 0.0688 x 8.908 g/cm^3 = 0.612 g
moles Ni = 0.612 / 58.69 g/mol= 0.0104

Is that right? At all?

THANK YOU!

• chemistry -

It's ok for the first part; i.e., mols nickel. The question has another part to it.

• chemistry -

For that part I thought that the formula would be NiF2.

• chemistry -

I think the author of the problem expected you to calculate the formula.
You have mols Ni = 0.0104.
You know g nickel fluoride = 1.261 g.
less g nickel = 0.6124
= 0.6486 g fluorine.
Determine mols fluorine then find the ratio. I get a funny number when I do it. like 1:3.28. If I thought the accuracy was very good that would lead me to think the formula is Ni3F5 which isn't likely. If I thought the accuracy was suspect, I would round the 3.28 to 3 and call it NiF3. There IS a NiF3 compound although it isn't common.

• chemistry -

To find this part are you using F, or F2. F2 was in the original question.

• chemistry -

It's true F2 was in the original problem but only as a means of telling you what reacted. F2 is simply a synonym for fluorine.
To determine the formula, we determine the mols Ni and mols F (not F2), determine the ratio of the two and that gives us the empirical formula.

## Similar Questions

1. ### Chemistry - Solution Stoichiometry

A piece of nickel is placed in a beaker with 350 mL of copper (II) sulfate. Calculate the concentration of the copper (II) sulfate solution. Initial mass of nickel - 15.5 g Final mass of nickel - 11.4 g What do i do with the final …
2. ### chemistry

For corrosion resistance, a steel bolt is plated with nickel from a solution of nickel(II)sulfate. If 0.250 g of nickel produces a plating of the required thickness and a current of 0.540 A is used, predict how long in minutes the …
3. ### chemistry

A nickel has a mass of 5.000 grams and is composed of 25% nickel and 75% copper. What is the mass of copper in the nickel?
4. ### math

a.u.s nickel contains 3.9g of copper and 1.2g of nickel. how many kilograms of copper must be combined with 500 kg of nickel to make nickel coins?
5. ### Chemistry

we created a nickel coordination compound made of nickel and chlorine and we used silver nitrate to titrate it. If the silver nitrate solution had been exposed to light and reacted with chlorine, would the calculated percent of nickel …
6. ### Chemsitry 2

a piece of nickel wire has a diameter of 0.568. if the nickel has a density of 8.90g/cc, how long( in meters) should you cut a piece of wire to obtain 0.0234 moles of nickel?
7. ### Chemistry

Nickel carbonyl has a formula: Ni(CO)4. Nickel carbonyl is produced by the reaction of solid nickel metal with carbon monoxide gas. 1. how do you write a balanced equation for this reaction?
8. ### physics

The U.S. five-cent coin, the nickel, has a mass of 5.1 g, a volume of 0.719 cm3, and a total surface area of 8.54 cm2. Assuming that a nickel is an ideal radiator, how much radiant energy per second comes from the nickel, if it is …
9. ### Chemistry

A 500.0 mL sample of saturated nickel(II) phosphate solution was analyzed spectrophotometrically and found to contain 1.88 × 10-5 g of nickel. (a) Determine the molarity of the nickel(II) phosphate solution. (b) Calculate the solubility …
10. ### chemistry

A coin dealer offers to sell you an ancient nickel coin that is 3.1 cm in diameter and 4.65 mm in thickness. A) The density of nickel is 8.9 g/cm3. How much should the coin weigh if it is pure nickel?

More Similar Questions