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lesantik [10]
2 years ago
10

Most naturally occurring oxygen (O) isA. oxygen-16 B. oxygen-18 C. oxygen-15 D. oxygen-17

Chemistry
1 answer:
tankabanditka [31]2 years ago
5 0

Answer:

Oxygen 16 is the most common naturally occurring isotopes of oxygen.

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Ammonia and hydrogen fluoride both have unusually high boiling points due to
nexus9112 [7]

Answer:

C. hydrogen bonding

Explanation:

Ammonia and hydrogen fluoride are both able to exhibit hydrogen bonding due to containing nitrogen (in ammonia) and fluoride (obviously in hydrogen fluoride). Remember the unique qualities of NOF. :)

5 0
3 years ago
Animals have internal stimuli or cues that help them survive. Which stimuli is external rather than internal?
dem82 [27]
D bc people can feel how hot u are
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3 years ago
Which is always the first step in dealing with an accident in the lab?
marin [14]
The answer is the letter C
3 0
3 years ago
Read 2 more answers
Una muestra de 258.4 g de etanol (C2H5OH) se quemó en una bomba calorimétrica
Ilia_Sergeevich [38]

Answer:

Explanation:

Unclear question.

I infer you want a clear rendering, which reads;

A 258.4 g sample of ethanol (C2H5OH) was burned in a calorimetric pump using a Dewar glass. As a consequence, the water temperature rose to 4.20 ° C.

If the heat capacity of the water and the surrounding glass was 10.4 kJ / ° C, calculate the heat of combustion of one mole of ethanol.

4 0
3 years ago
If the edge length of the unit cell is 705.2 pm, what is the density of KI in g/cm3.
Kipish [7]

The density  is 3.144 g / cm^3.

<u>Explanation</u>:

If effective number of atom in NaCl type structure, z = 4

a = 705.2 pm ⇒ In centimeter = 705.2 \times 10^-10

Na = 6.023 \times 10^23

density = (molecular weight) (z) / (Na) (a^3)

where molecular weight of KI is 166 g,

           Z represents the atomic number

density = (molecular weight) (z) / (Na) (a^3)              

             = (166 \times 4) / (6.023 \times 10^23) \times (705.2 \times 10^-10)

density = 3.144 g / cm^3.

5 0
3 years ago
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