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AysviL [449]
3 years ago
15

Three isotopes of oxygen are oxygen-16, oxygen-17 and oxygen-18. Write the symbol for each, including the atomic number and mass

number
Chemistry
1 answer:
sweet-ann [11.9K]3 years ago
6 0

oxygen-16 = 8 O 16

oxygen-17 = 8 O 17

oxygen-18 = 8 O 18

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If there is 3% freshwater available on earth, approximately what percentage of it is in ice?
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A gas absorbs 10J of heat and is simulataneously comptessed by a constant external pressure of 0.5atm from 4L to2L in volume.Wha
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Answer:

B. 111 J

Explanation:

The change in internal energy is the sum of the heat absorbed and the work done on the system:

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At constant pressure, work is:

W = P ΔV

Given:

P = 0.5 atm = 50662.5 Pa

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This means that the steel bar lost 14900 J of thermal energy. What is the change in temperature of the steel bar? Recall that th
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Answer:

ΔT=-747,13°C

Explanation:

Sensible heat is<em> the amount of thermal energy that is required to change the temperature of an object</em>, the equation for calculating the heat change is  given by:

Q=msΔT

where:

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  • m, mass of the substance [g]
  • s, specific heat capacity [J/g°C] (
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To solve the problem, we clear ΔT of the equation and then replace our data:

Q=msΔT

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Thus, the change in temperature of the steel bar is -747,13°C, meaning that the temperature of the bar decreases.

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The sun's inner core is the hottest part of the sun<br><br> true or false
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How many grams of solid Ca(OH)2 (74.1 g/mol) are required to make 500 ml of a 3 M solution?
mars1129 [50]

Answer:

111.15 g are required to prepare 500 ml of a 3 M solution

Explanation:

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Since 1 mol of Ca(OH)₂ has a mass of 74.1 g, 1.5 mol will have a mass of

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