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3 years ago

Write chemically balanced equation for the following reactions

Chemistry

1 answer:

natka813 [3]3 years ago

7 0

Answer:

(C)Calcium oxide reacts sulfuric acid

Explanation:

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In scientific notation, the number .000 000 753 should be written as

kramer

Answer:

Explanation:

You want one whole number to the left of the decimal. Depending on how many times u have to move the decimal over (in this case 7 times) determines the number you put after 10. And its -7 because to get it back to its original position you have to move left, which is a negative direction.

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3 years ago

which statement regarding the relative energies of monochromatic light with with λ = 800 nm andmonochromatic light with λ = 400

olga2289 [7]

Answer:

The correct answer is option A.

Explanation:

Energy of the photon of an electromagnetic radiation is give by Planck's equation:

$E=\frac{hc}{\lambda }$

Where:

h = Planck's constant

c = speed of light

$\lambda$ = Wavelength of the photon's radiation

Energy of photon of 800 nm monochromatic light

$\lambda = 800 nm=400\times 10^{-9} m$

$E=\frac{hc}{800 \times 10^{-9} m}$

Energy per mole of photons:

$E\times N_A=\frac{hc}{800 \times 10^{-9} m}\times 6.022\times 10^{23} mol^{-1}$ ..[1]

Energy of photon of 400 nm monochromatic light

$\lambda '= 400 nm=400\times 10^{-9} m$

Energy per mole of photons:

$E'\times N_A=\frac{hc}{400 \times 10^{-9} m}\times 6.022\times 10^{23} mol^{-1}$ ..[2]

[1] ÷ [2]

$\frac{E\times N_A}{E'\times N_A}=\frac{\frac{hc\trimes 6.022\times 10^{23} mol^{-1}}{800 \times 10^{-9} m}}{\frac{hc\times 6.022\times 10^{23} mol^{-1}}{400 \times 10^{-9} m}}$

$\frac{E}{E'}=\frac{1}{2}$

$E=\frac{1}{2}\times E'$

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3 years ago

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When sodium chloride is dissolved in water, the resulting solution is classified as a

Savatey [412]

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That’s the real answer

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3 years ago

Calculate the concentration of hydrochloric acid if 50.0 mL of hydrochloric acid is neutralized by 25.0 mL of 2.0 M sodium hydro

Arisa [49]

Answer:

1.0M HCl is the concentration of the acid

Explanation:

Based on the reaction, 1 mole of NaOH reacts per mole of HCl. That means the moles added of NaOH in the neutralization = Moles of HCl in the solution. With the moles and the volume in Liters we can find the molar concentration of HCl

<em>Moles NaOH = Moles HCl:</em>

25.0mL = 0.025L * (2.0moles / L) = 0.050moles HCl

<em>Molarity:</em>

0.050moles HCl / 0.0500L =

<h3>1.0M HCl is the concentration of the acid</h3>

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The chemistry teacher asked George to transfer an ideal gas from container A to container B. Container B is half the size of con

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I think the answer is increase; increase

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4 years ago

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