# 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)

1. 👍 0
2. 👎 0
3. 👁 782
1. I think you mean 4P not P4
4P(S) +3NaOH(aq) +3H2O(I) �¨3NaH2PO4(aq) +PH3(g)

You need 4 P atoms on the left for every PH3 molecule on the right

atomic mass of P = 31
molecular mass of PH3 = 31+3 = 34
so every gram of PH3 has (31/34) grams of P
but we need 4 times that much to provide the other three in 3NaH2PO4
so for every gram of PH3 we need 124/34 grams of P
so
200 (124/34) = 729 grams of P

1. 👍 2
2. 👎 0

## Similar Questions

1. ### pmdc

Calculate the mass of Mg metal required to consume 2560g of CO2 in the reaction. 2Mg+CO2_2MgO+C

2. ### Chemisry

what mass of protons would be required to just neutralize the charge of 1.0g of electrons? how do I answer this? You know the mass of an electron. Calculate how many are in 1 gram. You will need the same number of protons. Knowing

asked by Chris on February 8, 2007
3. ### chemistry

For 2SO2(g)+O2(g)⇌2SO3(g), Kp=3.0×104 at 700 K. In a 2.00-L vessel the equilibrium mixture contains 1.15 g of SO3 and 0.107 g of O2. 1) How many grams of SO2 are in the vessel? ---------------------------- A flask is charged

asked by whateva on January 31, 2018
4. ### physics(heat)

a mixture of 250g of water and 200g of ice at 0deg C is kept in a calorimeter which has a water equivalent of 50g. if 200g of steam at 100deg C is passed through this mixture, calculate the final temperature and the mass of

asked by ridhi on May 29, 2012
1. ### 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

asked by Dylan on January 18, 2011
2. ### 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

asked by Stan3000 on February 6, 2012
3. ### science

1. Liquid phosphorus trichloride, PCl3 is made by the direct combination of phosphorus and chlorine. a. What is the maximum mass of PCl3 that can be produced from 125 g of P4 and 323 g Cl2? b. What mass of P4 remains after the

asked by wesley on August 23, 2016
4. ### joint heirs college, Fola agoro, shomolu Lagos.

CHEMISTRY (1) What is the equation for reaction when calcium oxide and coke are heated in electric furnace (2) what solid remains when the following is heated-(a) lithium trioxonitrate (v), (b) potassium trioxonitrate (v), (c)

asked by Agunlejika Precious on October 15, 2015
1. ### Chemistry

Suppose that a device is using a 5.00-mg sample of silicon that is doped with 1 × 10-5% (by mass) phosphorus. How many phosphorus atoms are in the sample?

asked by Angel on March 6, 2018
2. ### chemistry

the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the half-life of cobalt-60

asked by shaleena on April 6, 2011
3. ### Chemistry

6Li(s) + N2(g) 2Li3N(s) a) What mass of lithium is required to produce 0.575 g of Li3N in the balanced reaction? b) What mass of nitrogen is required for the reaction? ------------------------------------------- I tried

asked by Brian on March 8, 2015
4. ### Chemistry

Given these chemical reactions: Ca^(2+)(aq) + 2IO3^(-)(aq) → Ca(IO3)2(s) Ca(NO3)2·4H2O(s) → Ca^(2+)(aq) + 2NO3^(-)(aq) + 4H2O(l) KIO3(s) → K^(+)(aq) + IO3(-)(aq) Calculate the masses of Ca(NO3)2·4H2O(s) and KIO3(s)

asked by Rodrigo on January 23, 2010