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3 years ago

6. A piece of solid gold was heated from 274K to 314K. 35.73 of energy was needed to raise the temperature.

1 answer:

5 0

From Q = mcΔT, we can rearrange the equation to solve for mass, m = Q/cΔT. The specific heat capacity, c, of solid gold is 0.129 J/g °C. I'm assuming that the energy is given in joules, as it's not specified in the question as written.

m = Q/cΔT = (35.73 J)/(0.129 J/g °C)(40.85 °C - 0.85°C)

m = 6.92 g of gold was present

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2 years ago

Zn-64 = 48.63%

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Answer:

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Explanation:

Given that,

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$A=\dfrac{48.63\times 64+27.90\times 66+4.1\times 67+18.75\times 68+0.62\times 70}{100}\\A=65.46\ u$

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3 years ago

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Explanation:

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We can see that the word BOOK shows us elements boron, oxygen, oxygen and potassium.

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3 years ago

An empty water bottle is full of air at 15°C and standard pressure. The volume of the bottle is 0.500 liter. How many moles of a

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Answer:- 0.0211 moles of air.

Solution:- This problem is based on an ideal gas law equation.

temperature, pressure and volume are given and asked to calculate the moles of the air. Standard pressure is 1.00 atm.

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V = 0.500 L

The ideal gas law equation is, PV = nRT

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For n, the equation is rearranged as:

$n=\frac{PV}{RT}$

Let's plug in the values and do the calculations:

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n = 0.0211 moles

So, there are 0.0211 moles of the air in the bottle.

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3 years ago

If an atom has 35 protons in nucleus how many neutrons will it have orbiting the nueclues

Dvinal [7]

Answer

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Explanation:

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3 years ago