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IceJOKER [234]
3 years ago
8

Which of the following statements is true about Planck's Law?

Chemistry
2 answers:
kogti [31]3 years ago
6 0
Whats an electronic do we even know?
iren [92.7K]3 years ago
5 0
B) The frequency of the emitted light is directly proportional to the energy given off by the electrons. 

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When 2.5 mol of O2 are consumed in their reaction, ________ mol of CO2 are produced
Vika [28.1K]

The given question is incomplete. The complete question is:

The combustion of propane (C3H8) in the presence of excess oxygen yields CO_2 and H_2O

C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2(g)+4H_2O (g)

When only 2.5 mol of O_2 are consumed in order to complete the reaction, ________ mol of CO_2 are produced.

Answer: Thus when 2.5 mol of O_2 are consumed in their reaction,  1.5 mol of CO_2 are produced

Explanation:

The balanced chemical equation is:

C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2(g)+4H_2O (g)

According to stoichiometry :

5 moles of O_2 produce = 3 moles of  CO_2

Thus 2.5 moles of O_2 will produce = \frac{3}{5}\times 2.5=1.5 moles of  CO_2

Thus when 2.5 mol of O_2 are consumed in their reaction,  1.5 mol of CO_2 are produced

4 0
3 years ago
I need help with question 2 I will brainliest you if I’m able to
erik [133]

Answer:

Blank 1: Microscope

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4 0
2 years ago
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G.P.E. on Earth is determined by an object's _______and _______
lozanna [386]

Answer:

mass and height of the object.

5 0
2 years ago
What is carbon? What does it do?
Archy [21]

Answer:

Carbon is in carbon dioxide, which is a greenhouse gas that works to trap heat close to Earth. Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth's temperature, make up the food that sustains us, and provide energy that fuels our global economy. Most of Earth's carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms

Explanation:

Hope it helps. Can you give me BRAINLIEST ANSWER. Thank you

7 0
2 years ago
A 72 g sample contains how many moles of water? (include appropriate sig figs in your answer)
sammy [17]

Answer:

2

Explanation:

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3 years ago
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