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Paul [167]
2 years ago
11

How much heat is needed to raise the temperature of 100g of an iron from 25°C to

Chemistry
1 answer:
Black_prince [1.1K]2 years ago
5 0

Answer:

382.5J

Explanation:

<em>Use the formula:</em>

E = mcΔθ or Q = mcΔT

m = 100g

c = 0.45 J/g°C

ΔT or Δθ = 110 - 25 = 85°

<em>Sub in the values:</em>

E = 100 × 0.45 × 85

= 382.5J

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Answer:

318 kPa

Explanation:

Step 1: Given data

  • Initial pressure (P₁): ?
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Step 2: Calculate the initial pressure of the gas

Assuming constant temperature and ideal behavior, we can calculate the initial pressure of the gas using Boyle's law.

P₁ × V₁ = P₂ × V₂

P₁ = P₂ × V₂ / V₁

P₁ = 95.5 kPa × 1.25 L / 0.375 L = 318 kPa

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Magnesium unites completely and vigorously with oxygen to form magnesium oxide, which contains 60% magnesium by weight. If 1.00
Dmitry_Shevchenko [17]

Answer:

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