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October 1, 2014

Search: PH3

Number of results: 49

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 (E) CH4, SiH4, SiO2, NH3, PH3
February 10, 2010 by LeePyeonggang

chemistry
what is the maximum number of grams of PH3 that can be formed when 6.2 g of phosphorus reacts with 4.0 g of hydrogen to form PH3
March 21, 2010 by jose

chemistry
calculate the mass of phosphorus required to make 200g of phosphine ,PH3 by the reaction: P4(S) +3NaOH(aq) +3H2O(I) 3NaH2PO4(aq) +PH3(g)
June 19, 2011 by ceasar

chemistry
what is the maximum number of grams of PH3 that can be formed when 6.2grams of phosphorus reacts with 4.0 grams of hydrogen to form PH3? P4+6H2--> 4PH3
June 9, 2008 by afdsfd

chemistry
What is the maximum number of grams of PH3 that can be formed when 6.2 grams of phosphorus reacts with 4.0 grams of hydrogen to form PH3? P4+6H2-->4PH3. how do i do this question
June 10, 2008 by Miley

CHEMISTRY
Consider the reaction shown below. 4 PH3(g) P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0061 mol PH3 is consumed in a 1.9-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
February 27, 2011 by Mattie

chemistry
Many reaction involving heterogeneous catalysts are zeroth order, that is rate=k. An example is the decomposition of phosphine (PH3) over tungsten (w): 4Ph3---> P4 + 6H2 It is found That the reaction is independent of PH3. As lon 1 g as phosphine's pressure is sufficiently ...
March 25, 2012 by court

Science
8. The balanced equation P4 (s) + 6H2 (g) --> 4PH3 tells us that 2 mol H2 a. reacts with 1 mol 4 b. produces 4 mol PH3 c. cannot react with phosphorus d. produces 2 mol PH3 e. reacts with 2 mol P4 idk y i cant seem to get the answer from the choices above?
January 18, 2011 by Dylan

chemistry
For each pair of substances listed below, identify the one with the lower boiling point. (a) Silane (SiH4) and Phosphine (PH3) answer = silane (b) Ammonia (NH3) and Phosphine (PH3) answer = phosphine (c) Lithium fluoride (LiF) and Hydrogen Fluoride (HF) answer = HF
May 31, 2013 by barco

chemistry
PH3 has a mass of 17.33 grams, what is the mass in grams of H2 produced? 4 PH3 -> P4 + 6 H2
December 6, 2010 by jamie

AP CHEMISTRY
At 80.C, Kc = 1.87 10-3 for the reaction. PH3BCl3(s) PH3(g) + BCl3(g) (a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel at 80.C and decomposes until equilibrium is reached. (b) If the flask has a volume of ...
February 6, 2012 by Stan3000

AP CHEM
Kc = 1.87 10-3 for the following reaction. PH3BCl3(s)=>PH3(g) + BCl3(g) (a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel and decomposes until equilibrium is reached. (b) If the flask has a volume of 0.400...
February 7, 2009 by Ashley

chemistry
enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction 2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this reaction. Explain how this information allows you to determine the spontaneity or non-spontaneity of this reaction at any temp (S for PH3 is ...
February 12, 2013 by harry

chemistry
Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.) C3H8 NH41+ HCl H2 H2O H2CO3 PH3 Which of the following substances can act as a Bronsted base in aqueous solution? (Select all that apply.) PH3 PH41+ CO32- SO42- H2 CH4 NH3
April 27, 2010 by Sue

11th grade
What is the balanced chemical equation for P+H2>PH3?
December 3, 2009 by Butt

science
Balance in acid solution PH3+ I2-> H3PO4+ I-
September 6, 2010 by Joseph

chemistry
HOW MANY LITERS OF H2 must react to produce 75.0g of PH3
April 3, 2011 by jane

chemistry
Write the expression for Kc and Kp for the reaction PH3BCl3(s) <==> PH3(g) + BCl3(g)
March 8, 2012 by Lindsay

Chemistry
What mass of phosphine gas yields 3.5x10^-6 moles of PH3
November 9, 2010 by Cathy

chemistry
The total number of atoms in 0.111 mol of FeCO3(PH3)2...?
October 3, 2011 by Linda

science
I need help with balancing redox reactions Balance in acid solution: 1) PH3+ I2 --> H3PO4+ I- 2) ClO3- + Cl- --> Cl2
September 7, 2010 by Joseph

chem
would you expect the nonbonding electron pair domain in nh3 to be greater or less in size than for the corresponding one in PH3?
June 28, 2012 by skye

chemistry
What would Qc be if the volume of the container decreased by a factor of 1.774 for the following reaction? PH3(g) + BCl3(g) → PH3BCl3(s) KC = 534.8 at 353.0oC
May 6, 2014 by Andy

Chemistry
If the standard enthalpy of formation of PH3(g) is +5.4 kJ mol-1, calculate the reaction enthalpy for 2PH3(g)--->2P(s)+3H2(g)
October 20, 2012 by Sam

chemistry
identify and show the bond in the formation of the following; AsH3 BaO BCL3 SO2 ZnC2 CL2 K2S PH3 PLS I NEED AN ANSWER THANKS
June 19, 2011 by joyce

Chemistry
Are these shapes correct?PH3-trigonal pyramidal, CHCl3-tetrahedral, H2S-linear and PO4^-3-tetrahedral?
December 7, 2011 by Lisa

Chemistry
what are the coumpound names? Ex: H20: Dihyrdogen monoxide PH3 H3N H3PO2 CuSO4 P2O2 H2SO5 What is the formula? Ex: Nitric Acid: HNO3 Titanium (IV) Oxide:
January 12, 2011 by Anonymous

Chem
How do you tell what type of solid (atomic, molecular, ionic, covalent network) will any substance form (i.e. PH3, H2, acetate)? I know that its mainly determined by what is at the lattice points but still have no clue how to go about it.
November 20, 2007 by Steve

Chem help
For which of the following molecules would the intermolecular forces be influenced mainly by dipole-dipole forces? PH3 CH3OHO HF C2H5OH CH3COCH3 how do I determine this
November 2, 2012 by Lindsey

MSJH
When heated, elemental phosphorus, P4, produces phosphine, PH3, and phosphoric acid, H3PO4. How many grams of phosphine are produced if 56 grams of P4 have reacted?
May 10, 2013 by MS

chemistry
When heated, elemental phosphorus, P4, produces phosphine, PH3, and phosphoric acid, H3PO4. How many grams of phosphine are produced if 56 grams of P4 have react
May 10, 2013 by ms

Chemistry
The boiling point of phosphine, PH3(-88C) is lower than that of ammonia, NH3(-33C) even though phosphine has twice th molar mass of NH3. Why?
March 8, 2011 by MMPM

science
Balancing redox reactions Balance in acid solution 1. PH3+ I2 -> H3PO4 + I- 2. ClO3- + Cl- -> Cl2 Balance in basic solution Se -> Se2- + SeO3^2- BrO- + Cr(OH)4^- -> Br- + CrO4^2-
September 7, 2010 by Joseph

chem 1211
P2 +3H2=2ph3 How many grams of ph3 can be formed when 37.5 grams of p2 and 83 L of h2 gas are reacted at 1 atm and 273.25 K? I really need a step by step of this problem. Thanks in advance!
October 21, 2013 by Sara

CHEMISTRY- intermolecular forces
What intermolecular forces act in the following: H2 PH3 CH3NH2
November 3, 2010 by Jasmin

Chemistry
consider the following molecules:SiH4, PH3, H2S. What is similar about these molecules? What is different about these molecules and why?
November 1, 2012 by Bhavna

Chemistry
For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5. ) i, iii, iv
November 22, 2009 by Apple

science
(Points: 10) For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5...
November 21, 2009 by victor

science
(Points: 10) For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5...
November 22, 2009 by victor

science
Which of the following has a boiling point which does not fit the general trend. NH3 PH3 SbH3 AsH3 I am going with NH3 as i think its to do with "the larger the compound the greater the boiling point"(Vander waals forces) Am I correct?
May 11, 2010 by Anonymous

chemistry
For the following: i) H3PO4 > H3AsO4 > H3SbO4 ii) H2Te > H2Se > H2S > H2O iii) HCl > HBr > HI iv) SbH3 > AsH3 > PH3 > NH3 The order of acidity is correct for which series? 1. ) all are correct 2. ) i and ii 3. )i, ii and iv 4. ) ii, iii 5. ii, iv...
November 24, 2009 by bob

need help for chemistry
Account for the following observation: 1)Ammonia is exceptionally soluble in water. 2)Hydrogen fluoride ,HF, has a higher boiling temperature than methane, CH4. 3)The boiling temperature of ammonia (NH3)is -33˚C but that of phosphine (PH3) is -88˚C
January 21, 2013 by Danial

please help me for chemistry
Account for the following observation: 1)Ammonia is exceptionally soluble in water. 2)Hydrogen fluoride ,HF, has a higher boiling temperature than methane, CH4. 3)The boiling temperature of ammonia (NH3)is -33˚C but that of phosphine (PH3) is -88˚C
January 22, 2013 by Danial

Chemistry
Dr Bob Can you please confirm for me that only NH3 has a boiling point that does not fit the general trend from these choices NH3 PH3 SbH3 AsH3 many thanks andy I am picking NH3 because of the reason that the larger the compound the greater the boiling point Am I right with my...
May 11, 2010 by Andy

chemistry
Balance each of the following equations a)CH4+CL2......>CCl4+HCl b)AL(OH)3+H2SO4.....>Al2(SO4)3+H2O c)Fe+H2O......>fe3O4+H2 d)Al4C3+HCl......>AlCl3+CH4 e)C2H6+O2......>CO2+H2O f)P2H4.......>PH3+P4 g)S2Cl2+NH3......>N4S4+NH4CL+S8 h)Ag+HNO3.......>AgNO3+...
April 15, 2012 by faisal

Chemistry
Why does I2 have a higher boiling point than F2? And why does NH3 have a higher boiling point than PH3?
December 4, 2012 by Jeremy

Physiology
Indicate whether the following circumstances would tend to increase, decrease or have no effect on the rate of enzyme activity. 1.adding more substrate but keeping the amount of enzyme of the same 2.adding more enzyme but keeping the amount of substrate the same 3. adding a ...
February 15, 2011 by Jerome

science(chem)
Hi =) I have two Q's 1. What are the 2 purposes of using a caffine standard during the HPLC process? In general not talking about HPLC I would think a standard is for a)comparing to your own results to see how good your results came out. b) seeing if you have any contamination...
February 2, 2008 by ~christina~

Chemistry
I am super confused when it comes to these types of questions! Can someone check my work? None of my answers matched those of my teacher when she read them this morning for last night's homework. Please help! 1. Consider the following equilibrium reaction: 2PH3(g) <-> 2P...
May 18, 2009 by Samantha

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