Answer:
O A. A metal higher on the activity series list will replace one that is
lower.
The answer is heterogeneous
Answer. Answer: Scientists study how things work, while engineers create new things
Explanation:
We calculate the amount of carbon fixed as follows.
= kg
= -1273.1 kJ/mol
= -393.5 kJ/mol
= -285.8 kJ/mol
Hence, total reaction will be as follows.
=
= 2802.7 kJ/mol
Therefore, calculate the number of moles of fixed carbon as follows.
=
=
Thus, we can conclude that the annual enthalpy change resulting from the photosynthetic carbon fixation over the land surface is .
The total number of Ca2+ ions and F- ions that are present in the cubic unit cell will be 4 and 8 respectively.
<h3>How to calculate the unit cell?</h3>
From the complete information, the number of Ca2+ at corners will be (8 × 1/8 = 1) and those a the center will be (6 × 1/2 = 3). Therefore, the total number of Ca2+ will be:
= 1 + 3 = 4
The total number of F- ions will be:
= 4 × 2 = 8
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