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Nady [450]
3 years ago
9

Which SI unit is used when dealing with the intensity of light?

Chemistry
2 answers:
Yuri [45]3 years ago
6 0
Hello! The SI based unit for measuring the intensity of light is the candela. It’s defined as the luminous intensity in a direction that emits radiation of frequency and radiation intensity in the same direction. It’s replaced the standard candle as the unit. The answer is C: candela.
yanalaym [24]3 years ago
5 0
C. candela . this is the answer.
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∆G° for the reaction of nitrogen with hydrogen to produce ammonia (see balanced chemical equation below) has a value of -33.3 kJ
Juliette [100K]

Answer:

-0.85KJ

Explanation:

Given N2(g) + H2(g) <--->2NH3(g)

Kp =[ P(NH3)]²/[P(H2)]³[P(N2)]

Where P is the pressure of the gas

P(H2)b= P(N2) = 125atm

P(NH3) = 200atm

Kp = 2²/(125)³(125)

Kp = 2.048 ×10^-6

∆G = -RTlnKp

R =0.008314 J/Kmol

T = 25 +273/= 298k

= 8.314 ×10^-3 × 298 × ln(2.048 ×10^-6)

= -0.008314 × 298 × (-13.099)

= 32.45KJ

∆G = ∆G° + RTlnKp

∆G = -33.3 + 32.45

∆G = -0.85KJ or -850J

3 0
4 years ago
How does geothermal energy differ from solar energy?
miss Akunina [59]

Answer:

Solar panels capture the sun's rays and convert it into heat and electricity, which is used to heat and cool your home, while geothermal solutions use the constant core temperature of the Earth to warm and cool a property.

Explanation:

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8 0
3 years ago
What is the specific heat capacity of silver metal if 55.00 g of the metal absorbs 193.9J of heat and the temperature rises 15.0
skad [1K]

Answer:

The specific heat capacity of silver is 0.24 j/g.°C.

Explanation:

Given data:

Mass of sample = 55.00 g

increase of temperature ΔT= 15.0 °C

Heat absorbed = 193.9 J

Specific heat capacity of silver = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance.

ΔT = change in temperature

Now we will put the values in formula.

193.9 J = 55.00 g × c ×15.0 °C

193.9 J = 825 g.°C  × c

c = 193.9 J / 825  g.°C

c= 0.24 /g.°C

The specific heat capacity of silver is 0.24 j/g.°C.

5 0
3 years ago
Can you please help me with the question above ✔
dedylja [7]

Answer:

A. Crest

B. Amplitude

C. Trough

D. Wavelength

7 0
4 years ago
Given the equation
astra-53 [7]

Answer:

1.81 x 10^{24} molecules H2

Explanation:

Use Avogadro's number:

3 moles H2 x 6.022 x 10^{23} molecules= 1.81 x 10^{24} molecules H2

4 0
2 years ago
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