# Chemistry

express this mass as a percentage of the weight of your sample of plant food. this is the % of elemental phosphorous in the plant food.

I'm not sure what the question is asking for. The mass its referring to is 0.06438g Phosphorus and the weight of the plant food is 1.007g.

1. 👍 0
2. 👎 0
3. 👁 46
1. (Mass P/mass sample)*100 = %

1. 👍 0
2. 👎 0
2. ok and i had another question:

convert that to the % phosphorus present as phosphorous pentoxide (P2O5)

1. 👍 0
2. 👎 0
posted by Buzz
3. %P2O5 = %P x (molar mass P2O5/2*atomic mass P) = ??

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

A sample of a new plant food, "super gro", was analyzed. Determine the amount of grams of P and P2O5 as well as the percentage of P2O5 in a sample of "super gro". Mass of plant food sample: 12.50 grams Mass of MgNH4PO46H2O

asked by Justin on April 5, 2018
2. ### Chemistry

HELP!! I'm doing an experiment to do with phosphorus and plant food and MgNH4P04 6H20 my air dry weight of MgNH4P04 6H20 was 1.31 g grams of P in plant food was .165 g % P in plant food is 13.87% % P205 equivalent to % P above is

asked by Alyssa on April 25, 2014
3. ### Health

1. What is one reason why the percentage of overweight teens has increased over the past 50 years? A. Teenagers spend a lot more time outside. B. Television commercials promote healthy food. C. There is more junk food and fast

asked by Jake Paul in the title on January 8, 2018
4. ### Chemistry

a sample of a compound with a mass of 0.4168g is extracted from a plant. Decompostion of this sample produces 0.1667g of carbon, 0.2223g oxygen, and the remainder is hydrogen. What is the percentage compostion (by mass) of the

asked by Cali on December 3, 2015
5. ### % Recovery

How do you calculate percent recovery? I have this info: Weight of sample used: 0.198g Actual weight of sample: 0.325g Other info needed? What you have posted is confusing. What do you mean by "actual weight of sample?" Is that

asked by Anonymous on February 19, 2007
6. ### science

when can the plant start to make its own food? A plant always makes its own food. Ever since it existed it made its own food through photosynthesis. The leaves take in the sunlight and form it into food. It also releases oxygen.

asked by christina on February 27, 2007
7. ### Chemistry

need to calculate percent yield of MgNH4PO4 . 6H2O obtained in my experiment using 10-52-10 plant food label as a guide to determine the theoretical yield of MgNH4PO4 . 6H2O. My calculations so far: air dry weight of MgNH4PO4 .

asked by Julia on May 27, 2011
8. ### algebra

A biologist knows that the average length of a leaf of a certain full-grown plant is 4 inches. The standard deviation of the population is 0.6 inch. A sample of 20 leaves of that type of plant given a new type of plant food had an

asked by probability and statistic on May 20, 2017
9. ### Chemistry

A 25.00mL sample of a household cleaning solution was diluted to 250.0mL in a volumetric flask. A 50.00mL aliquot of this solution required 40.38mL of 0.2506 M HCl to reach a bromocresol green end point. Calculate the

asked by Ellen on March 28, 2012
10. ### science

. The pyramid of mass demonstrates that ______ a) the same number of organisms is at the top as at the base of the pyramid b) mass is gained as a food chain progresses c) at each link in a food chain, mass is lost d) the mass of

asked by pam on September 9, 2010

More Similar Questions