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OleMash [197]
1 year ago
10

Calculate the density of a piece of wood, in the units of g/mL, with a volume of 2.5L and a mass of 12.5 kg

Chemistry
1 answer:
Ganezh [65]1 year ago
5 0

Answer:

5 g / ml

Explanation:

Convert the values given to   g   and ml

12.5 kg = 12500 g

2.5 L = 2500 ml

12500 g / 2500 ml = 5 g/ml

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In a calorimetry experiment 2.50 g of methane is burnt in excess oxygen. 30% of the energy released during the combustion is abs
Vikentia [17]

The total energy released per gram of methane burnt is  119,941.3 J/g.

<h3>Energy absorbed by water</h3>

Q = mcΔθ

where;

  • m is mass of water
  • c is specific heat of water
  • Δθ is change in temperature

Q = (500)(4.184)(68 - 25)

Q = 89,956 J

<h3>Total energy released per gram of methane burnt</h3>

0.3T =  89,956 J

T =  89,956 J/0.3

T = 299,853.3 J

Total energy per gram of methane, E = T.E/m

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Thus, the total energy released per gram of methane burnt is  119,941.3 J/g.

Learn more about energy here: brainly.com/question/25959744

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2 years ago
What is the percentage of magnesium sulfate in MgSO4 x 7H2O.
son4ous [18]
48.78%
Percentage of MgSO4 = mass of MgSO4/ mass of sample (MgSO4. 7H20) and multiply it by 100.

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4 years ago
What is Δn for the following equation in relating Kc to Kp?CH4(g) + H2O(g) ↔ CO(g) + 3 H2(g)-120-3-2
Sindrei [870]

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Explanation:

The balanced chemical equation is:

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Relation of K_p with K_c is given by the formula:

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Where,

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Putting values in above equation, we get:

K_p=K_c\times (RT)^{2}

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