An atomic mass unit is defined as precisely 1/12 the mass of an atom of carbon-12.
Positively charged and the sodium ion would be a cation
Answer:

Explanation:
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In this case, we can divide the problem in two steps:
1. Dilution to 278 mL: here, the initial concentration and volume are 1.20 M and 52.0 mL respectively, and a final volume of 278 mL, it means that the moles remain the same so we can write:

So we solve for C2:

2. Now, since 111 mL of water is added, we compute the final volume, V3:

So, the final concentration of the 139 mL portion is:

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Answer:
The atoms share some of their outer electrons so that each atom has a stable noble gas arrangement.
Explanation:
Answer:
Cold
Explanation:
Because 0°C And below or 32°F Refers To Cold Weather