Question

In: Chemistry

Please explain all answers 1) Phenol was the first antiseptic. It has the chemical composition 76.57%...

Please explain all answers

1) Phenol was the first antiseptic. It has the chemical composition 76.57% C, 6.43% H, 17.00% O. The molecular weight of phenol was determined by mass spectroscopy to be 94.114 g/mol. What is the molecular formula for phenol?

2) A 3.5514 g of a chromium oxide was found to contain 2.4299 g of chromium and 1.1215 g oxygen. What is the empirical formula for this chromium oxide?

3) Phosphoric acid is produced by the reaction of calcium phosphate, Ca3(PO4)2, with sulfuric acid. How much phosphoric acid can one make from exactly one US ton (2000 lbs) of calcium phosphate?

Expert Solution

moles of C = 76.57 / 12 = 6.381

moles of H = 6.43 / 1 = 6.43

moles of O = 17 /16 = 1.0625

C H O

6.381 6.43 1.0625

6 6 1

empirical formula = C6H6O

empirical formula mass = 94.114 g

n = molar mass / empirical formula mass

n = 1

molecular formula = n x empirical formula

= C6H6O

2)

A 3.5514 g of a chromium oxide was found to contain 2.4299 g of chromium and 1.1215 g oxygen. What is the empirical formula for this chromium oxide?

moles of Cr = 2.4299 / 52 = 0.0467

moles of O = 1.1215 / 16 = 0.0701

moles ratio : Cr : O = 1 : 1.5 = 1 : 3/2

empirical formula = Cr2O3

queen_honey_blossom answered 1 year ago

What is the chemical composition of a chromosome? one-two sentence answers, please.

1- Explain how lead inhibits heme synthesis. 2- Explain the difference in the chemical composition of...

1- Explain how lead inhibits heme synthesis. 2- Explain the difference in the chemical composition of hemosiderin and ferritin. 3- How is sideroblastic anemia confirmed by laboratory analysis? Explain your answer. 4- Differentiate primary and secondary hemochromatosis? 5- Explain the absorption and assimilation of non-heme iron into hemoglobin in the RBC.

1,)The chemical composition of the peptidoglycan carrier bactoprenol is highly hydrophobic. Explain why this is necessary...

1,)The chemical composition of the peptidoglycan carrier bactoprenol is highly hydrophobic. Explain why this is necessary for bactroprenol to carry on its function 2.)Briefly describe the mechanism of action of beta-lactam antibiotics such as penicillin.

1. Explain why processed meats labeled as “Uncured” are actually cured in terms of chemical composition...

1. Explain why processed meats labeled as “Uncured” are actually cured in terms of chemical composition and typical characteristics of cured meat products 2. The crushing of crisp or crunchy foods results in fracture and fragmentation, it appears that fracture and sound emission are associated. Attenburrow et al. (1992) reported that the sounds emitted during the crushing of a dry product are due to a sudden release of stored elastic energy. The association between mechanical fracture and sound emission has...

Explain why spectral lines are useful in determining the chemical composition of their source.

Please provide answers and discussion on all of the following: Which liens get paid first in...

Please provide answers and discussion on all of the following: Which liens get paid first in foreclosure? Why? How do General Liens differ from Specific Liens? Why is the distinction made? Find the real estate tax rate in your county, and show us what the taxes would be on a $100,000 home in your area.

Answer true or false to the following questions please explain your answers and answer all please ...

Answer true or false to the following questions please explain your answers and answer all please 1.The cytoplasmatic side of the integral membrane proteins is often glycosylated. 2. Cholesterol is more enriched at the outer leaflet of the plasma membrana 3.Inner leaflet of the plasma membrane is enriched with glycolipids. 4.Membrane proteins that pomp ions in and out of the cell have specific Km values. 5. A symport would function as an antiport if its orientation in the membrane were...

Please! Numbering the answers! :) The production of a chemical compound requires a curation period of...

Please! Numbering the answers! :) The production of a chemical compound requires a curation period of 5.5 hours +/-.5 hours, a speed of 130 rpm +/- 20 rpm to obtain an acceptable product. If we want to know with a 95% confidence level, if these variables affect the production yield, then a multiple linear regression analysis need to be done. Curing RPM Yield 5.20 120.00 0.90 5.30 150.00 0.80 5.20 110.00 0.92 5.70 130.00 0.89 5.60 124.00 0.87 Determine: 1....

1. What is the chemical composition of the core of a one solar mass star during...

1. What is the chemical composition of the core of a one solar mass star during the red super giant (asymptotic giant) phase? a) mainly carbon and oxygen b) mainly helium c) mainly hydrogen 2. What kind of stellar remnant will be left when the sun dies? a) red giant b) black hole c) white dwarf d) neutron star Which of the following Is not true of the cosmic background radiation? a) it is nearly equally bright in all directions...

ANSWERS ARE GIVEN BUT MUST SHOW ALL WORK; PLEASE (NO EXCEL OR SPSS)* ---------------------------------------------------------------------- 1. To...

****ANSWERS ARE GIVEN BUT MUST SHOW ALL WORK; PLEASE (NO EXCEL OR SPSS)***** ---------------------------------------------------------------------- 1. To answer this question, refer to the following hypothetical data collected using replicated measures design. Subject 1 2 3 4 5 6 7 8 9 10 Pre 50 49 37 16 80 42 40 58 31 21 Post 56 50 30 25 90 44 60 71 32 22 A. In a two-tailed test of H 0 using α=0.05, what is p(obtained) for the...