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3 years ago

An isotope contains 47 protons, 47 electrons, and 60 neutrons. What is the identity of the isotope?

Chemistry

2 answers:

erastovalidia [21]3 years ago

7 0

Answer:

To find the identity of the isotope we must first calculate the mass number

Mass number (M) = A + Z

Where

A is the atomic number

Z is the neutron number

A = 47

Z = 60

M = 60 + 47 = 107

From the options above

The answer is option A

Hope this helps you

Kazeer [188]3 years ago

7 0

ionic compound (NH4)2SO4. b. Explain why it cannot be molecular by referring to the Lewis diagrams you drew above as well as the octet rule.

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Explanation:

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A bottle of wine contains 0.21 moles of ethanol,C2H5OH. The volume of the solution is 0.1 L. Calculate the molarity.

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2.1mol/L

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3 years ago

A steam engine (assume a Carnot engine ) has an efficiency of 50.8%. If the waste heat has a temperature of 72.4 ◦C, what is the

Inessa05 [86]

Answer:

The temperature of the boiler is approximately 147.1 °C

Explanation:

A Carnot engine is an ideal engine that has the highest efficiency among all the engines because the second law of thermodynamics.That efficiency $\eta$ is:

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with $T_{h}$ the temperature of the hot reservoir (the boiler temperature) and $T_{c}$ the temperature of the cold reservoir (the steam temperature). Solving for $T_{h}$ :

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