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Rufina [12.5K]
3 years ago
12

Cuales eran los tres cultivos principales en México y America central ? A. El cacao , el maní , el aguacate B. El chile , la pap

a , el tomate , C . El maíz , el frijol , y la calabaza
Chemistry
1 answer:
zimovet [89]3 years ago
7 0

Answer:

C) El maiz, Frijol y calabaza

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Harry stores toxic chemical waste in a large steel tank that has only 15% of its volume underground. Jena lives in the wildernes
Anvisha [2.4K]

Answer:

Only Harry and Jena

Explanation:

Under federal regulations, an UST is any one or a combination of tanks such that the volume of an accumulation of regulated substances is 10% or more beneath the surface of the ground.

Any UST system holding a mixture of hazardous waste and other regulated substances are also are not covered by federal regulations regarding USTs.

Farm or residential tank of capacity more than 11 gallons used for storing motor fuel is covered by federal regulations regarding USTs.

According to the given question,

Only Harry and Jena are covered by federal regulations regarding USTs.

7 0
3 years ago
Which physical property is being used to separate the mixtures in each of the following cases?
kirill115 [55]

I think that this is

6 0
3 years ago
What is the pH of a 0.222 M acetic acid solution?
Oksi-84 [34.3K]

pH=2.7

<h3>Further explanation</h3>

Acetic acid = weak acid

\tt [H^+]=\sqrt{Ka.M}

Ka = acid ionization constant

M = molarity

Ka for Acetic acid(CH₃COOH) : 1.8 x 10⁻⁵

\tt [H^+]=\sqrt{1.8\times 10^{-5}\times 0.222}\\\\=0.001998=1.998\times 10^{-3}

\tt pH=3-log~1.998=2.7

7 0
3 years ago
Water fluoridation and cancer risk if you have a concern about fluoride in your drinking water, how do you get more information?
eimsori [14]

The centers for disease control and prevention (CDC) develops recommendations for water fluoridation along with technical requirements for each major compound used.

<h3>What is meant by water fluoridation?</h3>

Almost all water contains some fluoride, but usually not enough to prevent tooth decay. Fluoride can also be added to drinking water supplies as a public health measure for reducing cavities. Water fluoridation is the process of adding fluoride to the water supply so the level reaches approximately 0.7 ppm or 0.7 milligrams of fluoride per liter of water, this is the optimal level for preventing tooth decay.

To learn more about water fluoridation, visit:

brainly.com/question/13292361

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7 0
1 year ago
Identify the unit that is used for atomic masses.
sp2606 [1]

Answer:

AMU

Explanation:

5 0
2 years ago
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