college chemistry

posted by .

Lithium metal decomposes in water and releases hydrogen gas. if 275 ml of hydrogen gas is produced at stp. what is the mass of lithium that reacted ? Li(s)+H2O(l)=LiOH(aq)+H2(g)

  • college chemistry -

    Convert 275 mL H2 gas at STP to mols.
    275/22,400 = ??
    Use the coefficients to convert mols H2 to mols Li.
    Then g Li = mols Li x atomic mass Li.

  • college chemistry -

    0.171 g Li

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chem help?

    In an experiment 5.57 +/- 0.02 grams of water chemically decomposes into the products hydrogen gas and oxygen gas. The measured mass of oxygen gas produced in the reaction is 4.9320 +/- 0.0001 grams. The hydrogen gas occupies a volume …
  2. CHEM!!

    In an experiment 5.57 +/- 0.02 grams of water chemically decomposes into the products hydrogen gas and oxygen gas. The measured mass of oxygen gas produced in the reaction is 4.9320 +/- 0.0001 grams. The hydrogen gas occupies a volume …
  3. Chemistry

    metal hydrides react with water to form hydrogen gas and the metal hydroxide. How do you calculate the mass of hydrogen gas that can be prepared from 3.78 g of SrH2 and 3.5 g of H2O?
  4. 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?
  5. chem

    Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their …
  6. chm I

    Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their …
  7. 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?
  8. chemistry

    If 275 mL of hydrogen gas is produced at STP, what is the mass of lithium that reacted
  9. chem

    If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 Kelvin and 1.21 atmospheres?
  10. Chemistry

    Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. If 50.0 mL of hydrogen gas is produced at STP, what is the mass of potassium that reacted?

More Similar Questions