3 years ago

When using chemicals, you should always keep the following three questions in mind

1 answer:

5 0

Answer:Chemical hazards and toxic substances pose a wide range of health hazards (such as irritation, sensitization, and carcinogenicity) and physical hazards (such as flammability, corrosion, and explosibility).

Explanation:

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Predict which of the substances, NH3, N2, CH2Cl2, Cl2, CCl4 has

gulaghasi [49]

Answer:

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3 years ago

N2 + o2 -------> N2 O5

Wewaii [24]

2 N2 + 5 O2 ----> 2N2O5
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3 years ago

What is the wavelength of electromagnetic radiation with a frequency of 9.23 × 10^-7 Hz?

stich3 [128]

3.25 x 10¹⁴m

Explanation:

Given parameters:

Frequency of the radiation = 9.23 x 10⁻⁷hz

Unknown:

Wavelength of the radiation = ?

Solution:

The velocity of electromagnetic radiation is the same as that of the speed of light in vacuums.

Velocity = frequency x wavelength.

Velocity = 3 x 10⁸m/s

Since the unknown is wavelength, we factor it out:

Wavelength = $\frac{Velocity }{frequency}$

Wavelength = $\frac{x}{y}$ $\frac{ 3 x 10^{8} }{9.23 x 10^{-7} }$

= 3.25 x 10¹⁴m

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Wavelength brainly.com/question/6352445

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3 years ago

For the galvanic (voltaic) cell Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s) (E°= 0.77 V at 25°C), what is [Fe2+] if [Mn2+] = 0.040 M and

avanturin [10]

Answer:

0.01836 M

Explanation:

Again the reaction equation is;

Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s)

E°cell= 0.77 V

Ecell= 0.78 V

[Mn2+] = 0.040 M

[Fe2+] = the unknown

n=2

From Nernst's equation;

Ecell= E°cell- 0.0592/n log Q

0.78= 0.77 - 0.0592/2 log [Fe2+] /[0.040]

0.78-0.77= - 0.0592/2 log [Fe2+] /[0.040]

0.01/ -0.0296= log [Fe2+] /[0.040]

-0.3378= log [Fe2+] /[0.040]

Antilog(-0.3378) = [Fe2+] /[0.040]

0.459= [Fe2+] /[0.040]

[Fe2+] = 0.459 × 0.040

[Fe2+] = 0.01836 M

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4 years ago

A man weighing 48 N climbs 82.0 meter ladder how much work is done

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3 years ago