3 years ago

What does applied chemistry have to do with making ice cream?

2 answers:

6 0

Well you have to mix chemicals which caused a chemical reaction. When you mix salt and ice the freezing point of liquid changes. the ice gets colder

inysia [295]3 years ago

3 0

Salt and ice creates a chemical reaction needed to cool the cream down enough to freeze it

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What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 × 108 m/s; h = 6

ASHA 777 [7]

<u>Answer:</u> The energy of a mole of photons is $2.46\times 10^{5}J$

<u>Explanation:</u>

The relation between energy and wavelength of light is given by Planck's equation, which is:

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

where,

E = energy

h = Planck's constant = $6.626\times 10^{-34}Js$

c = speed of light = 3.0\times 10^8m/s

$N_A$ = Avogadro's number = $6.022\times 10^{23}$

$\lambda$ = wavelength of photon = 486 nm = $486\times 10^{-9}m$ (Conversion factor: $1m=10^9nm$ )

Putting values in above equation, we get:

$E=\frac{6.022\times 10^{23}\times 6.626\times 10^{-34}Js\times 3.0\times 10^8m/s}{486\times 10^{-9}m}\\\\E=2.46\times 10^{5}J/mol$

Hence, the energy of a mole of photons is $2.46\times 10^{5}J$

4 0

3 years ago

Name the ester that is formed when pentanoic acid reacts with isopropanol.a.isopropyl pentanoateb.isopropyl pentanec.pentanoate

blondinia [14]

Answer: A

Explanation:

Please check the attachment for the answer.

5 0

3 years ago

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What kinds of rocks would you expect to see on Mars? What evidence do you have

N76 [4]

like what are they made of? if so iron, due to iron oxide appearing as red hence why mars is red

3 0

3 years ago

What volume change occurs to a 400.0 mL gas sample as the temperature increases from 22.0 °C to 30.0°C?

nasty-shy [4]

V₁ = 400.0 mL

T₁ = 22.0ºC + 273 = 295 K

V₂ = ?

T₂ = 30.0ºC + 273 = 303 K

V₁ / T₁ = V₂ / T₂

400.0 / 295 = V₂ / 303

295 x V₂ = 400.0 x 303

295 V₂ = 121200

V₂ = 121200 / 295

V₂ = 410.84 mL

hope this helps!

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3 years ago

1. Why is the timing of tides predictable?

Blababa [14]

C hope that helps have a good one

7 0

3 years ago