3 years ago

What is the photoelectric effect?

Chemistry

1 answer:

scZoUnD [109]3 years ago

7 0

It's the emission of an electron when lights hit metal! Hope that helps! :)

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1. Which change of state is accompanied by the removal of heat energy

Alja [10]

H⁣⁣⁣⁣ere's l⁣⁣⁣ink t⁣⁣⁣o t⁣⁣⁣he a⁣⁣⁣nswer:

bit. $^{}$ ly/3a8Nt8n

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3 years ago

If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter incr

Alinara [238K]

Answer:

The value of the heat capacity of the Calorimeter $C_c$ = 54.4 $\frac{J}{c}$

Explanation:

Given data

Heat added Q = 4.168 KJ = 4168 J

Mass of water $m_w$ = 75.40 gm

Temperature change = ΔT = 35.82 - 24.58 = 11.24 ° c

From the given condition

Q = $m_w C_w$ ΔT + $C_c$ ΔT

Put all the values in above equation we get

4168 = 75.70 × 4.18 × 11.24 + $C_c$ × 11.24

611.37 = $C_c$ × 11.24

$C_c$ = 54.4 $\frac{J}{c}$

This is the value of the heat capacity of the Calorimeter.

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3 years ago

How did the work of louis pasteur help modern day medicine?

drek231 [11]

Pasteur showed that airborne microbes were the cause of disease. Pasteur built on the work of Edward Jenner and helped to develop more vaccines Pasteur’s career showed how conservative the medical establishment was at the time.

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3 years ago

Polyatomic ion formula for aluminum hydroxide

KonstantinChe [14]

Answer:

Al(OH)3 ? i hope this is what you mean.

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Nickel + oxygen = nickel oxide. What is the balanced redox reaction?

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Answer:

This is an oxidation-reduction (redox) reaction:

2 Ni0 - 4 e- → 2 NiII

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2 O0 + 4 e- → 2 O-II

(reduction)

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3 years ago