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podryga [215]
3 years ago
10

Explain why the mass number of oxygen is 16

Chemistry
1 answer:
elena55 [62]3 years ago
7 0

Answer:

Oxygen has an atomic number of 8 , and the mass number of an atom is the sum of its atomic number plus its neutron number. We got the mass as 16 units, and so it'll have 16−8=8 neutrons.

Explanation:

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What is the number of moles of ammonia gas formed when 0.5 mole of nitrogen gas is reacted with excess of hydrogen gas?​
Troyanec [42]

Answer: 1.5mol NH3

Explanation: 1N2+3H2= NH3

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7 0
1 year ago
Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance
Scrat [10]

Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance?


1. NaCl(aq) and LiNO3(aq)

2. KCl(aq) and AgNO3(aq)  answer

3. KCl(aq) and LiCL(aq)

4. NaNO3(aq) and AgNO3(aq)


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Anarel [89]

Answer:

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3 0
2 years ago
Hey!<br> I need a simple connotation of how glowsticks glow.<br> Please and thank you.
LenaWriter [7]

Answer:

simple

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5 0
2 years ago
What is the approximate energy of a photon having a frequency of 4 x 10^7 Hz? (h = 6.6 x 10^-34 J . s)
BigorU [14]

Answer:

2.64 ×10^{-26} J

Explanation:

I think you should mark it a physics question instead but anyway.

---------------------------------------------------------------------------

The Planck equation should be applied:

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E = 6.6 × 10^{-34} × 4 × 10^{7}

  = 6.6 × 4 × 10^{-27}

  = 2.64 ×10^{-26} J

3 0
3 years ago
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