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Sidana [21]
3 years ago
13

All of the following are exothermic reactions except,

Chemistry
1 answer:
monitta3 years ago
8 0
Exothermic reactions release heat the surrounding. So Freezing? 
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The vapor pressure of liquid octane, C8H18, is 40.0 mm Hg at 318 K. A sample of C8H18 is placed in a closed, evacuated container
Sergio039 [100]

Answer:

a, d

Explanation:

a. The pressure in the container will be 42.8 mm Hg.

d. Some of the vapor initially present will condense.

6 0
2 years ago
Engineers often attempt to capture and reuse energy or to use renewable resources to minimize harm to the environment. This is r
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THIS IS KNOW AS A GREEN DESIGN 
5 0
3 years ago
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Which two are present in both waxes and sphingomyelin? select all that apply. select all that apply. glycerol fatty acid phospha
maks197457 [2]
The compounds that are present in both waxes and sphingomylin are FATTY ACID AND LONG CHAIN ALCOHOL.
Waxes are diverse type of organic substances which are hydrophobic in nature and they are found in both plant and animals. Sphingomyelin is a type of sphingolipid, which are found in animal cell membranes. It is especially abundant in the  membranous myelin sheath which surround some nerve cells.<span />
8 0
3 years ago
pure sodium and chlorine are extremely dangerous, but when combined the result in substance that we use every day. How do you th
scZoUnD [109]

Answer:

Explanation:

chlorine has 7 valence electrons while sodium has 1. on their own, they are very reactive elements. a full valence electron shell has 8 electrons, so when elements combine and have 8 electrons in their outer shell, they are not reactive. when sodium and chlorine are combined to form sodium chloride (table salt), it is no longer dangerous. the number of valence electrons changes its reactivity and how it combines.

4 0
2 years ago
What is the theoretical yield of H2O if 130 g of H2O is produced from 18 g of H2 and an excess of O2?
g100num [7]
You are given 130 grams of H20 and 18 grams of H2. You are required to get the theoretical yield of H2O. Before anything else, you should know the chemical equation of H20 and H2. The balanced chemical reaction is 2H2 + O2 -> 2H2O. The molar mass of H2O is 18 grams per mole and the 2 grams per mole for H2.  

18g H2 (1 mol H2/2 g H2)(2 mol H2O/ 2 mol H2)(18 g H2O/1 mol H2O) = 162 g H2O  
<span>Thus the <u>theoretical yield for 18g H2 is 162g H2O.</u></span> <span> </span>
8 0
3 years ago
Read 2 more answers
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