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The first completely synthetic organic polymer was "bakelite" named for its inventor Leo Baekeland, a Belgian chemistry professor. Bakelite is a hard plastic used as an insulator for power plugs, distributor caps in automobiles, switches and circuit breakers, and the black handles on pots and pans. It is created by the reaction of Phenol (MM= 64.1) and formaldehyde (MM= 30).

C6h5oh + 3 Ch2o ----------> "Bakelite"

If 24.0 grams of phenol are combined with 18 grams of formaldehyde, how many grams of the reagent in excess will remain unreacted when the limiting reagent has been completely used up?

The answer is 5.2g of C6h50h Phenol. I could not get this answer. Show all step thanks :)

Nutrasweet is the brand name for the sweetener Aspartame. This molecule is the ester of a dipeptide that contains the amino acids phenylalanine and aspartic acid. If Aspartame is known to be 27.2 oxygen, by weight and it has a molecular weight of 292 g/mole, how many oxygen atoms must be found in each molecule of Aspartame?

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An unknown organic compound is known to contain only the elements carbon, hydrogen, and oxygen. When 6.60 g of this organic were burned in an excess of oxygen gas, 9.90 g of carbon dioxide and 2.70 g of water vapor were produced. In a second experiment the molecular weight of this unknown compound was estimated to be 180 +/- 20. What is the molecular formula of this organic compound?

The 180 +/- 20 is the uncertainty.

Chemistry, shows all steps thanks

Chemistry

Calculate the pressure of a gas that has decreased in temperature from 90 °C to 26 °C from and initial pressure of 2.2 atm.

Chemistry, gas laws

In recent history, individuals frequently cast nostalgic items in antique brass composed of 30% zinc and 70 % copper. How many grams of antique brass can be prepared from 120 grams of zinc and 63.4 grams of copper?

Empirical/ molecular formula chemistry

Chem

A 50 ml graduated cylinder weighs 54.48 g. When 42 mL of a liquid is placed inside, the cylinder weighs 95.212 g. What is the density of the liquid in g/mL?

When can I crash the board during free throw when i am behind the 3 point line? right when shooter release ball? or when ball touches the rim? thanks

I recently purchased creative inspire t6160 5.1 surround sound for my computer, but only two of the speakers work. The front right and left works, but center rear left and right does not work. However, whenever i play something on youtube every speakers work fine but when i do other things it doesnt work. Any solution or tips?

5(x+1)^4 - 5 find the critical numbers, show steps

find y' y=1/(sin(x-sinx))

anywhere in the settings to update it? i have xbox live so it usually updates by itself but this time its not

7 test worth 11 percent and final is 23 percent,