3 years ago

Which step comes before conducting an experiment in the scientific method

Chemistry

2 answers:

Romashka-Z-Leto [24]3 years ago

7 0

Answer:

Making a hypothesis

Explanation:

tiny-mole [99]3 years ago

7 0

Answer : Observation/Question

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victus00 [196]

Answer:

This isotope has 59 electrons giving it a charge of -2.

Explanation:

To find this we have to understand isotope relates to the mass of the nucleus. This isotope has 59 electrons to counter the protons and give it a negative charge.

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3 years ago

What test was used to identify hydrogen gas? Write a balanced equation to represent the test?

const2013 [10]

Burning splint test
2H2 (g) + O2 (g) -> 2H20 (g) + heat
It’s a combustion reaction

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3 years ago

Determine the pH of a 0.05 M solution of hydrocyanic acid (HCN). Hydrocyanic acid has an acid-dissociation constant of 4.9 × 10-

KATRIN_1 [288]

The answer is 5.3. Just did it in e2020

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3 years ago

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Carla is using a fertilizer that contains nitric acid. How is nitric acid classified?

suter [353]

Answer:

Strong acid.....(A)

Explanation:

hope this helps, the person above me is also correct

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3 years ago

Calculate the wavelength of the photon emitted when an electron makes a transition from n=6 to n=3. You can make use of the foll

Angelina_Jolie [31]

<u>Answer:</u> The wavelength of light is $1.094\times 10^{-6}m$

<u>Explanation:</u>

To calculate the wavelength of light, we use Rydberg's Equation:

$\frac{1}{\lambda}=R_H\left(\frac{1}{n_f^2}-\frac{1}{n_i^2} \right )$

Where,

$\lambda$ = Wavelength of radiation

$R_H$ = Rydberg's Constant = $1.097\times 10^7m^{-1}$

$n_f$ = Final energy level = 3

$n_i$ = Initial energy level = 6

Putting the values in above equation, we get:

$\frac{1}{\lambda }=1.097\times 10^7m^{-1}\left(\frac{1}{3^2}-\frac{1}{6^2} \right )\\\\\lambda =\frac{1}{914617m^{-1}}=1.094\times 10^{-6}m$

Hence, the wavelength of light is $1.094\times 10^{-6}m$

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4 years ago