posted by .

consider the following molecules:SiH4, PH3, H2S. What is similar about these molecules? What is different about these molecules and why?

  • Chemistry -

    All contain H atoms.
    The difference is that H has an oxidation state of +1 in H2S (the usual number for hydrogen but it is -1 in SiH4 and PH3. You can find some sources that give H a -1 in PH3 and some that give it a +1 in PH3. Since this question is stated as it is I assume the answer is to give it a -1 oxidation state. If you look up the electronegativities you will find 2.20 for H and 1.82 for P which makes P the + and H the -; therefore, I agree with those who assign +3 for P and -1 each for H in PH3.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider a mixture of six nitrogen molecules and six hydrogen molecules in a closed container. Assuming the reaction goes to completion, what will the final product mixture …
  2. chemistry 101

    calculate the molecules of oxygen required to react with 28.4g of sulfur in the following reaction?
  3. Chemistry

    Put the following in order in terms of increasing melting point: SiH4, SiO2, CH4, NH3, PH3. Lowest → Highest (A) NH3, PH3, CH4, SiH4, SiO2 (B) SiO2, PH3, NH3, CH4, SiH4 (C) SiH4, CH4, NH3, PH3, SiO2 (D) CH4, SiH4, PH3, NH3, SiO2 …
  4. chemistry

    Calculate the mass in g of each of the following. a. 2.3×10^22 H2O molecules b. 6.16×10^20 SO3 molecules c. 5.0×1025 O3 molecules d. 9.82×1019 CCl2F2 molecules
  5. 10th Grade Chemistry

    Which of the following molecules is polar?
  6. 10th Grade Chemistry

    I am having real trouble remembering how you can tell if a molecule is polar?
  7. chemistry

    How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2?
  8. chemistry

    How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2?
  9. Chemistry

    Draw the Lewis structure for each of these molecules. 1. PH3 2. H2S 3. HCl 4. CCl4 5. SiH4
  10. Science

    Consider the following reaction, 4 PH3(g) + 8 O2(g) → P4O10(s) + 6 H2O(g) If a container were to have 32 molecules of PH3 and 32 molecules of O2 initially, how many total molecules (reactants plus products) would be present in the …

More Similar Questions