Chemistry

Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide.

Li3N(s) + 3H2O(l) ==> NH3(g) + 3LiOH(aq)

a)What mass of water is needed to react with 32.9g Li3N?
b)When the above reaction takes place, how many molecules of NH3 are produced?
c)Calculate the number of grams of Li3N that must be added to an excess of water to produce 15.0L NH3(at STP).

1. 👍 0
2. 👎 1
3. 👁 2,089
1. 1. Write and balance the equation. You have that.

a. Convert 32.9 g Li3N to moles. moles = grams/molar mass.
Using the coefficients in the balanced equation, convert moles Li3N to moles H2O.
Then convert moles H2O to grams. g = moles x molar mass.

b. To obtain moles NH3, use the same process as in part a. Then remember that 1 mole of any material contains 6.022 x 10^23 molecules.

c. Same procedure as in a except convert 15.0 L NH3 at STP (remember 1 mole of a gas occupies 22.4 L at STP) to moles, convert moles NH3 to moles Li3N, then grams = moles x molar mass.

Post your work if you get stuck.

1. 👍 0
2. 👎 2
2. For a I have .948 mol Li3N and for h20 I have 17.07848544 grams so now what do I do

1. 👍 0
2. 👎 0
3. I got answers for a and b but I don't know where to begin on c

1. 👍 0
2. 👎 0

Similar Questions

1. Science

CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) A. The model should show 27 protons and

2. chemistry 105

Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)-->2LiN(s) What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?

3. Chemistry

In a lab, we added NH3(aq) to CuSO4(aq), and the solution turned dark blue with a precipitate. The problem is that the products ( Cu(NH3)4 and SO4) should be soluble, no? The question is then, what is the percipitate? The ppt is

4. Science

Compared to the process of extracting lithium from mineral deposits, the process of extracting lithium from evaporation ponds requires _____ water, _______ money, and ______ time My options: more, less, the same amount. Please

1. science--repost for Alexa

Science CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) A. The model should show 27

2. Science/Chemistry

Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct? The model should show 27 protons and 32 neutrons. The model should show 27

3. chemistry

Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750. mL of water?

4. Science

CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) A. The model should show 27 protons and

1. chemistry

Lithium chlorate is decomposed with heat to give lithium chloride and oxygen gas. If 2.23g of lithium chlorate is decomposed, how many milliliters of oxygen are released at stp?

2. Chemistry

Magnesium burns in air to produce magnesium oxide MgO and magnesium nitride Mg3N2. Magnesium nitride reacts with water to give ammonia. What volume of ammonia gas at 24 degrees C and 753 mmHg will be produced from 4.56 g of

3. Chemistry

Complete and balance the molecular equation, including phases, for the reaction of aqueous iron(III) nitrate, Fe(NO3)3 and aqueous lithium hydroxide, LiOH Enter the balanced net ionic equation, including phases, for this reaction.

4. chemistry

0.4324 g sample of a potassium hydroxide-lithium hydroxide mixture requires 28.28 ml of 0.3520 M HCl for its titration to the equivalence point. What is the mass percent lithium hydroxide in this mixture?