Chemistry: How many minutes does it take light, at a speed of 3.00e8 m/s (meters per second) to travel a distance of 93 million miles from the Sun to the Earth?

How many minutes does it take light, at a speed

sarahelisabeth444

29.01.2022

t = 8.27 minutes

Explanation:

We have,

Speed of light is $3\times 10^8\ m/s$

Distance of 93 million miles or $93\times 10^6\ \text{miles}=1.49\times 10^{11}\ m$

let t is time. So

$t=\dfrac{d}{v}\\\\t=\dfrac{1.49\times 10^{11}}{3\times 10^8}\\\\t=496.66\ s$

t = 8.27 minutes

So, 8.27 minutes is taken by the light.

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bnbjj

09.07.2021

Mass of Hydrated KAl(SO₄)₂ = 2.0 g

Molar mass of anhydrous KAl(SO₄)₂ = 258.20 g/ mol

Mass of of anhydrous KAl(SO₄)₂ = mass of the 2nd heating = A

The mass of water released = mass of the Aluminum Cup + 2.0 grams of KAl(SO₄)₂ - mass of the 2nd heating

= H g

Moles of water released = $\frac{H g}{18 g/mol}$

Moles of anhydrous KAl(SO₄)₂ = $\frac{A g}{258.20 g/mol}$

Required ratio = $\frac{moles of water}{moles of anhydrous KAl(SO4)2}$

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