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maks197457 [2]
2 years ago
5

Someone plsss help me I will make you as brain plsss

Chemistry
2 answers:
LenKa [72]2 years ago
8 0

Answer:

The answer is two and three.

Explanation:

Helga [31]2 years ago
6 0

Answer:

2 only

Explanation:

Hope this helps

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What type of pollution is pictured here?
Svetlanka [38]

Answer:this air polluction here.

Explanation:

air and soil polluction

8 0
2 years ago
8. A sample of sulfur has a mass of 223 g. How many moles of sulfur are in the sample?
Rama09 [41]

Answer:

7 moles

Explanation:

1mole of sulfur=32

x=223

=6.9

=7moles

8 0
3 years ago
A 0.753 g sample of a monoprotic acid is dissolved in water and titrated with 0.250 M NaOH. What is the molar mass of the acid i
Alexeev081 [22]

Answer:

MM_{acid}=140.1g/mol

Explanation:

Hello,

In this case, since the acid is monoprotic, we can notice a 1:1 molar ratio between, therefore, for the titration at the equivalence point, we have:

n_{acid}=n_{base} \\\\V_{acid}M_{acid}=V_{base}M_{base}\\\\n_{acid}=V_{base}M_{base}

Thus, solving for the moles of the acid, we obtain:

n_{acid}=0.0215L*0.250\frac{mol}{L}=5.375x10^{-3}mol

Then, by using the mass of the acid, we compute its molar mass:

MM_{acid}=\frac{0.753g}{5.375x10^{-5}mol} \\\\MM_{acid}=140.1g/mol

Regards.

7 0
3 years ago
Why does light from the infrared lamp<br> warm the mirror when light from the desk lamp does not?
Sunny_sXe [5.5K]

Answer:

Because the infrared lamp gives off a type of light that the desk lamp does not, and the mirror can only take in the energy from the infrared light.

Explanation:

7 0
3 years ago
What is the objective of sustainable development? Sustainable development is concerned with meeting needs without jeopardizing t
Anna [14]

Answer:

To meet the needs of the present without jeopardizing that of the future.

Explanation:

Sustainable development applies to all faculties of resource allocation. Most available resources are limited in their capacity to satisfy our limited human wants.

  • Sustainable development is such development geared towards satisfying the developmental needs of our present generation without endangering those of the future generations.
  • It allows for safe and efficient use/allocation of resources to meet wants.
  • Conservation of resources is an approach towards sustainable development.
  • The use of recycled materials is one method of attaining the obligations of sustainable development.
5 0
3 years ago
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