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Wittaler [7]
3 years ago
10

How much heat is liberated when 40 gram H, gas react with excess O2 gas

Chemistry
1 answer:
Pavel [41]3 years ago
8 0

Answer:wqqqqqqqqqqqqqqgqr

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Explanation:

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2KClO3 —> 2KCl2+ 3O2
garik1379 [7]

Answer:

False. The balanced equation should be

2KClO3-->2KCl + 3O2

it is a decomposition reaction.

3 0
3 years ago
P Explain what happened to the temperature on the heating curve of water as the water gained heat energy over the entire period
xz_007 [3.2K]
I think your answer would be that it increased
8 0
3 years ago
Consider the calculation of the pressure in kilopascals exerted by 1.25 g of nitrogen gas in a flask of volume 250 mL (0.250 dm3
Harrizon [31]

The amount of the nitrogen gas, N₂ molecules present is 2.68×10²² molecules

<h3>Avogadro's hypothesis </h3>

1 mole of N₂ = 6.02×10²³ molecules

<h3>How to determine the mole of N₂</h3>

We'll begin by calculating the number of mole of N₂. This can be obtained as follow:

  • Mass of N₂ = 1.25 g
  • Molar mass of N₂ = 28.02 g/mol
  • Mole of N₂ =?

Mole = mass / molar mass

Mole of N₂ = 1.25 / 28.02

Mole of N₂ = 0.0446 mole

<h3>How to determine the molecules of N₂ present</h3>

From Avogadro's hypothesis,

1 mole of N₂ = 6.02×10²³ molecules

Therefore,

0.0446 mole N₂ = 0.0446 × 6.02×10²³

0.0446 mole N₂ = 2.68×10²² molecules

Thus, the molecules of N₂ present is 2.68×10²² molecules

Learn more about Avogadro's number:

brainly.com/question/26141731

#SPJ1

6 0
2 years ago
A certain shade of blue has a frequency of 7.18 × 1014 Hz. What is the energy of exactly one photon of this light?
AysviL [449]
I'm assuming you meant 10^(14) instead of 1014
if so, then the energy of one photon will be be 4.76×10^(-19) Joules

4 0
3 years ago
Do pure substances have the same chemical and physical properties
Darya [45]
No, some impurities may alter the observed effects of a chemical reaction.. during a reaction other products may be produced, they may alter the MP or BP of the pure substance.  
4 0
3 years ago
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