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umka2103 [35]
3 years ago
14

What is the elevation of point B?

Chemistry
1 answer:
kakasveta [241]3 years ago
7 0
It is located about half-way between the 20 feet contour line and the 30 feet contour line. For this reason, the elevation of point B must be somewhere in between 20 and 30 feet.
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Saponification is a chemical reaction _____. A. due to the presence of a strong organic acid. B. that results in an alcohol and
dezoksy [38]

Answer:

that results in an alcohol and a carboxylic acid.

Explanation:

Saponification is a chemical reaction process of alkaline hydrolysis of esters(R'COOR group) by which soap is obtained.

For Example, when a base such as sodium hydroxide [NaOH]  is used to hydrolyze an ester, the products are a carboxylate salt and an alcohol. Because soaps are prepared by the alkaline hydrolysis of fats and oils.

In a saponification reaction, alkaline hydrolysis of fats and oils with sodium hydroxide  yields propane-1,2,3-triol and the corresponding sodium salts of the component fatty acids.

i.e  Fat or oil + caustic alkali ⇒ Soap + propane-1,2,3-triol

As a specific example, ethyl acetate and NaOH react to form sodium acetate and ethanol:

The reaction goes to completion in the image below:

8 0
3 years ago
Consider the reaction.
vovangra [49]

Answer: The value of Keq for the reaction expressed in scientific notation is  1.6\times 10^{-5}

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios.

For the given chemical reaction:

2NOCl(g)\rightarrow 2NO(g)+Cl_2(g)

The expression for K_{eq} is written as:

K_{eq}=\frac{[NO]^2\times [Cl_2]}{[NOCl]^2}

K_{eq}=\frac{(1.2\times 10^{-3})^2\times (2.2\times 10^{-3})}{(1.4\times 10^{-2})^2}

K_{eq}=1.6\times 10^{-5}

The value of Keq for the reaction expressed in scientific notation is  1.6\times 10^{-5}

3 0
3 years ago
Which element is classified as an alkali metal?<br> Rb<br> Sr<br> Zr<br> Cl
qwelly [4]
Hi there.

Alkali metals are known as the group 1 elements.

When we know this, we just have to look to group 1 of the periodic table.

Rb (Rubidium) is in group 1; it is classified as an alkali metal.

~
4 0
3 years ago
Read 2 more answers
Consider the chemical equations shown here.
CaHeK987 [17]

Answer:

-867.7kJ

Explanation:

3H2(g)+O3(g)—>3H2O(g)=

-867.7kJ

8 0
3 years ago
The student plans to conduct a spectrophotometric analysis to determine the concentration of Cu2+(aq) in a solution. The solutio
mestny [16]

Answer:

The wavelength the student should use is 700 nm.

Explanation:

Attached below you can find the diagram I found for this question elsewhere.

Because the idea is to minimize the interference of the Co⁺²(aq) species, we should <u>choose a wavelength in which its absorbance is minimum</u>.

At 400 nm Co⁺²(aq) shows no absorbance, however neither does Cu⁺²(aq). While at 700 nm Co⁺²(aq) shows no absorbance and Cu⁺²(aq) does.

7 0
3 years ago
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