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cluponka [151]
3 years ago
14

Which of the following statements is the most accurate? A. Energy transfers are never 100% efficient. B. Energy transfer is comp

letely efficient. C. Energy cannot be transferred to other forms. D. Energy transfers can be used to create perpetual-motion machines.
Chemistry
2 answers:
qaws [65]3 years ago
6 0
I'd say it's A because while the energy cannot be lost, it can not be 100% efficient because if it was we wouldn't have to worry about energy.
Olegator [25]3 years ago
5 0

Answer:

A. Energy transfers are never 100% efficient

Explanation:

According to the  first law of thermodynamics energy can neither be created nor destroyed but it can be converted from one form to another. According to the second law of thermodynamics transfer of energy is never 100% efficient in a machine. There is always loss of energy due to wear and tear of the machinery.

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Consider the unbalanced chemical equation HBr + B = BBr3 + H2. When
Vitek1552 [10]

Answer:

B and BBr3

Explanation:

1) 3HBr + B = BBr3 + H2 (double all equation because H2)

2) 6HBr + <em>2B </em>= <em>2BBr3</em> + 3H2

4 0
3 years ago
A scientist has isolated a fatty acid that has 26 carbons. most of the carbon atoms in the fatty acid chain are connected by sin
Shtirlitz [24]
Answer:
            <span>Based on giveninformation, the compound is a <u>Poly Unsaturated</u> fatty acid.

Explanation:
                   Fatty acids are carboxylic acids with -COOH functional group and a chain of hydrocarbons.

Fatty Acids are classified as,

i) Saturated Fatty Acids:
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Examples:
                 Lauric Acid           </span>CH₃(CH₂)₁₀COOH<span>

                 Myristic Acid         </span>CH₃(CH₂)₁₂COOH<span>

                 Palmitic Acid         </span>CH₃(CH₂)₁₄COOH

ii) Unsaturated Fatty Acids:
                                      Those Fatty Acids in which contain a single double bond (mono-unsaturated) or more than one double bond (poly-unsaturated) d between the carbon atoms in a chain are called as unsaturated fatty acids. 

Examples:
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</span>
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The saturated fatty acid containing 26 carbon atoms is called as Cerotic acid. While cerotic acid containing a double bond at position 3 and 9 has a IUPAC name H</span>exacosa-3,9-dienoic acid with following structure.

3 0
3 years ago
How and when do real gases differ from ideal gases? ​
MrRa [10]
Ok I’m not completely confident on this but I think it’s when there are only little amounts of the gas
6 0
2 years ago
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gogolik [260]

Answer:

16 km/2 sec=8km/sec

Explanation:

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What would be a rule to help you identify foods<br> containing carbohydrates?
abruzzese [7]

Answer:

In order to help identify foods containing carbohydrates,

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-Anything that is derived from plants is a carbohydrate.

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