chemistry

According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy?

SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ

  1. 👍
  2. 👎
  3. 👁
  1. 184 kJ energy released in the formation of 2 moles(36 g) H2O. So
    36.0 g H2O x (975 kJ/184 kJ) = ??

    1. 👍
    2. 👎
  2. 45

    1. 👍
    2. 👎
  3. what mass of Mg combines with 5.80 L of O2 measured at STP

    1. 👍
    2. 👎
  4. 190.8

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. AP Chemistry

    (a)calculate the mass percent of carbon in the hydrated form of the solid that has the formula BeC2O4 X 3 H2O (s). I divided 24.02 g by 151.08 g and got .16, or 16%. is that correct? Also, I'm having trouble with this follow up

  2. Chemistry

    A 0.879 g sample of a CaCl2 ∙ 2 H2O / K2C2O4 ∙ H2O solid salt mixture is dissolved in 150 mL of deionized water. A precipitate forms which is then filtered and dried. The mass of this precipitate is 0.284 g. The limiting

  3. chem

    In a solution prepared by mixing CH3OH with H2O the major species pesent are 1. a. CH3+, OH, and H2O 2. b. CH3O, H+, and H2O 3. c. CH3OH and H2O 4. d. CH3OH, H+, and OH I know i have to get an equation having trouble doing that!!

  4. Chem

    Butane, C4H10, is widely used as a fuel for disposable lighters. When one mole of butane is burned in oxygen, carbon dioxide and steam are formed and 2658 kJ of heat is evolved. a) Write the thermochemical equation for the

  1. chemistry

    Carbon dioxide (CO2) reacts with water (H2O) to form carbonic acid (H2CO3). Which equation demonstrates the law of conservation of matter for this reaction? A. 2 CO + H2O —> H2CO3 B. CO2 + H2O —> H2CO3 C. CO2 + 2 H2O —> 2

  2. UCF

    What will be the change in enthalpy when 100.0 g of butane, C4H10, is burned in oxygen as shown in the thermochemical equation below? 2 C4H10(l) + 13 O2(g) → 8 CO2(g) + 10 H2O(g) ΔH = −5271 kJ −2636 kJ −4534 kJ −9087 kJ

  3. chemistry

    A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed and found to have a mass of 160 grams. What is the formula for the hydrate? CuSO4 * 10 H2O CuSO4 * 7

  4. Science/Chemistry

    Write a Balanced equation for the chemcial reaction Acetylene gas (C2H2) burns in a welding torch with oxygen to form carbon dioxide gas and water vapor. C2H2(g) + O2(g) ==> CO2(g) + H2O(g) It isn't balanced. I will leave that for

  1. Chemistry

    (1) Why are fractional coefficients permitted in a balanced thermochemical equation? In thermochemical reactions, only small amounts of matter are considered. If fractional coefficients were not used, the scale of the reaction

  2. chem

    For the reaction 3NO2 + H2O  2HNO3 + NO, how many grams of HNO3 can form when 1.00 g of NO2 and 2.25 g of H2O are allowed to react? This is a limiting reagent problem. 1. Write the equation. You have done that and it is balanced.

  3. Differential equation

    A first order linear equation in the form y′+p(x)y=f(x) can be solved by finding an integrating factor μ(x)=exp(∫p(x)dx) (1) Given the equation (x+4)^2y′+5(x+4)y=16 find μ(x)= I found it to be e^(5ln(x+4))which is

  4. Chemistry

    Octane (C8H18) undergoes combustion according to the following thermochemical equation: 2 C8H18(l) + 25 O2(g) ---> 16 CO2(g) + 18 H2O(l) DHo = -11,200 kJ Given : DHfo [CO2(g)] = -393.5 kJ/mol and DHfo[H2O(l)] = -285.8 kJ/mol.

You can view more similar questions or ask a new question.