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3 years ago

Burning gasoline is an _____________ reaction.

Chemistry

2 answers:

sweet-ann [11.9K]3 years ago

6 0

Burning gasoline is an exothermic reaction.

rusak2 [61]3 years ago

5 0

Answer:

chemical.............

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One gram of an acid, HA of unknown molecular mass is dissolved in water and 22.72 cm3 of 0.60 M sodium hydroxide solution added

FinnZ [79.3K]

Chemistry

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3 years ago

What is the name of the structure that holds the vocal cords?

Fittoniya [83]

Answer:

The answer is larynx. I believe it is anyways. Sorry if i'm wrong.

7 0

3 years ago

Can somebody please help me!!!

Verizon [17]

Answer:

javier applied force how this helps

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3 years ago

A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a

torisob [31]

Answer:

C) $k_a=1.3\times 10^{-5}$

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

$pH=-log(\sqrt{k_a\times C})$

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, $Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M$

C = 0.100 M

$2.94=-log(\sqrt{k_a\times 0.100})$

$\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94$

$\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}$

$k_a=1.3\times 10^{-5}$

4 0

3 years ago

One of the primary benefits of a survey is that they

snow_lady [41]

Answer:

B). Allow efficient gathering of unobservable phenomena.

Explanation:

Surveys are described as the method of gathering information from a specified group of respondents for purposes like research or assessment of the truth of thoughts or opinions associated with a process.

As per the question, one of the most considerable benefits of the survey is that 'it allows the efficient gathering of unobservable phenomena'. The data associated with phenomena like stated preferences, behaviors, beliefs, and factual information are unobservable and can not be collected through observation but surveys help in doing so as well as in the assessment of the validity or reliability of the existing propositions about such phenomena. Thus, <u>option B</u> is the correct answer.

5 0

3 years ago