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timofeeve [1]
3 years ago
13

How many atoms are in 0.00100 mole of Na?

Chemistry
2 answers:
Ymorist [56]3 years ago
8 0
There rlly isn’t noooo number so what do you expect of course it would be zero. 0£
Rainbow [258]3 years ago
8 0

Answer:

6.02x10^23 atoms  i think

Explanation:

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To solve this problem we just need to use the rule of three:
150g..................395.1J
450g................xJ

x = 450*395.1/150 = 1185,3J

450.0 g of the substance completely reacted with oxygen will produce 1.1853 kJ(<span>kiloJoule</span>)
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A 100-gram sample of material requires 1220 calories of heat energy to raise its temperature from 20 0C to 80 0C. What is the sp
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Taking into account the definition of calorimetry, sensible heat and latent heat, the specific heat capacity of the material is 0.203 \frac{calories}{gC}.

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

The amount of heat a body receives or transmits is determined by:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

<h3>Specific heat capacity of the material</h3>

In this case, you know:

  • Q= 1220 calories
  • c= ?
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Replacing in the definition of amount of heat:

1220 calories= c× 100 g× 60 C

Solving:

c= 1220 calories÷ (100 g× 60 C)

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Finally, the specific heat capacity of the material is 0.203 \frac{calories}{gC}.

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