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Alex777 [14]
3 years ago
9

Which of the following is not a way water gets polluted in the household?

Chemistry
1 answer:
lilavasa [31]3 years ago
8 0

Answer:

<h2>*my opinion *</h2><h2>1. using it for chemicals</h2><h2>2. poisoning somebody</h2><h2 />

Explanation:

<h2>that's all-</h2>
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Supongo que quiere preparar una solución al 10% de sulfato de magnesio en peso. El frasco del producto químico que se tiene indi
Darina [25.2K]

Answer:

Se requerirán 14.57 gramos de MgSO₄·7H₂O, que se disolverían en 105.43 gramos de agua.

Explanation:

Si tenemos 120 gramos de una solución al 10% de sulfato de magnesio en peso, habrán en la solución (120*10/100) 12 gramos de sulfato de magnesio (MgSO₄).

Sin embargo, el reactivo que está disponible es heptahidratado (MgSO₄·7H₂O), por lo que hay que calcular <em>cuántos gramos de sulfato de magnesio heptahidratado contendrán 12 gramos de MgSO₄</em>.

<u>Calculamos las moles de 12 gramos de MgSO₄</u>, usando su masa molecular:

  • 12 g MgSO₄ ÷ 120.305 g/mol = 0.0997 mol MgSO₄.

<u>Después calculamos la masa de MgSO₄·7H₂O que contendrá 0.0997 mol MgSO₄</u>, usando la masa molecular de MgSO₄·7H₂O:

  • 0.0997 mol * 246.305 g/mol = 14.57 g MgSO₄·7H₂O

Para saber la cantidad de agua en la que se disolverá el reactivo, restamos la masa de soluto de la masa total de la solución:

  • 120 g - 14.57 g = 105.43 g

6 0
3 years ago
I neeed help please help
mina [271]

A. Lowering the temperature.

I hope this helped!

7 0
3 years ago
Read 2 more answers
Which of the following is created when solids, liquids, or gases mix with one another? Mixture Element Compound Pure substance
Masja [62]

Answer:

The answer is a mixture

Explanation:

Different states of matter can be mixed without making a chemical change which makes it a mixture

8 0
3 years ago
How many moles of Cl in 38.5 mol of CCl2F2?
Gennadij [26K]

Answer:

77 moles

Explanation:

The given chemical compound is CCl2F2 is called Dichlorodifluoromethane. In CCl2F2, we have:

one mole of a Carbon atom.

two moles of Chlorine atom; &

two moles of Fluorine atom.

Given that one mole of Chlorine = 38.5 moles.

Then, two moles will be:

= 2 × 38.5 moles

= 77 moles

5 0
2 years ago
What is this answer <br><br> Most energy enter the ecosystem​ through the process of
max2010maxim [7]
Also, remember, light energy (from the sun) is a reactant for photosynthesis. The plant uses water sunlight and carbon dioxide to make sugars as well as oxygen. Plants, the organisms that carry out photosynthesis, are typically the first ate organism is a Food chain and so most other organisms energy came from the plant somehow. But the plant got its energy from the sun.
6 0
3 years ago
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