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aniked [119]
4 years ago
13

One isotope of carbon has 6 protons and 6 neutrons. The number of protons and neutrons of a second isotope of carbon would be __

___.
a. 7 and 6
b. 7 and 7
c. 6 and 6
d. 6 and 7
Chemistry
2 answers:
bogdanovich [222]4 years ago
7 0
Answer d



Explanation
dexar [7]4 years ago
6 0
D. 6 protons and 7 neutrons

As proton remains constant
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Answer:

3.945 x 10²¹ molecules

Explanation:

  • Firstly, we need to calculate the no. of moles using the relation:
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  • It is known that every 1.0 mol of a molecule contains Avogadro's number of molecules (NA = 6.022 x 10²³).
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4 0
3 years ago
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A sample of gas occupies a volume of 67.5 mL . As it expands, it does 131.0 J of work on its surroundings at a constant pressure
baherus [9]

Answer:

The final volume V2=1.3175L

Explanation:

between work ( w), pressure ( P ) and volume ( V ) is the following:

w=−PΔV

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Note that work, should be expressed in 1L⋅atm=101.3J

CHECK THE ATTACHMENT FOR DETAILED EXPLATION

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4 years ago
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Answer:

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Explanation:

Step 1: Data given

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sodium hydroxide = NaOH

Step 2: The unbalance equation

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The net ionic equation, for which spectator ions are omitted - remember that spectator ions are those ions located on both sides of the equation - will , after canceling those spectator ions in both side (Ba^2+ and Br-), look like this:

H+(aq) + NO3-(aq) + Na+(aq) + OH-(aq) →Na+(aq) +NO3(aq) + H2O(l)

H+(aq) +  OH-(aq) → H2O(l)

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4 years ago
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klemol [59]

Answer:

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Explanation:

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3 years ago
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Which pair of substances would most likely result in the production of a solid when reacting with a base?
Grace [21]
<span>soluble metal salt and carbon dioxide 
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