Answer:
2.409 x 10²⁴
Explanation:
There are two nitrogens for every mole of NH₄NO₃
Since there are two moles, that means there are 4 nitrogens
There are 6.022 x 10²³ atoms in every mole of any element
(6.022 x 10²³) x 4 = 2.4088 x 10²⁴
Use sig figs to round it to 2.409 x 10²⁴
Answer:
74 or 74 kPa.
Explanation:
Hello,
In this case, based on the initial information, it is seen that the oxygen and the carbon dioxide form the mixture at 160 kPa, thus, by isolating the oxygen, its pressure will be equal to its initial partial pressure because it gets isolated, hence, we compute its molar fraction as:

Therefore, its initial pressure turns out:

Such pressure will be the oxygen's pressure once it is isolated. Finally, considering the request, the answer will be just 74 (by rounding to the nearest integer and without units).
Best regards.
Answer:
heat energy are absorbed by water molecules and it is used to change the molecules from liquid to gas? if thats what your asking.
Explanation:
Can someone help me with my answer
In scientific notation", that number would be written as
6.81 x 10⁻⁴ .