Answer:
hope it helped you
Explanation:
3 atoms of nitrogen and 4 atoms of hydrogen in each molecule
Answer: 6.25 mol
Explanation:
From the reaction that produces water from its elements (shown in the image), we know that for every mole of oxygen gas consumed, 2 moles of water are produced.
This means that 12.5/2=<u>6.25 mol</u> of oxygen gas is needed.
Answer:
protons
Explanation:
the number of protons in 1 atom determine the identity
Answer:
ΔH°f(C₈H₁₈(g)) = -210.9 kJ/mol
Explanation:
Let's consider the combustion of C₈H₁₈.
C₈H₁₈(g) + 25/2 O₂(g) ⟶ 8 CO₂(g) + 9 H₂O(g) ΔH°rxn = − 5113.3 kJ
We can calculate the standard enthalpy of formation of C₈H₁₈(g) using the following expression.
ΔH°rxn = 8 mol × ΔH°f(CO₂(g)) + 9 mol × ΔH°f(H₂O(g)) - 1 mol × ΔH°f(C₈H₁₈(g)) - 25/2 mol × ΔH°f(O₂(g))
1 mol × ΔH°f(C₈H₁₈(g)) = 8 mol × ΔH°f(CO₂(g)) + 9 mol × ΔH°f(H₂O(g)) - 25/2 mol × ΔH°f(O₂(g)) - ΔH°rxn
1 mol × ΔH°f(C₈H₁₈(g)) = 8 mol × (-393.5 kJ/mol) + 9 mol × (-241.8 kJ/mol) - 25/2 mol × 0 kJ/mol - (− 5113.3 kJ)
ΔH°f(C₈H₁₈(g)) = -210.9 kJ/mol
Hydrophilic molecules that are to be released by cells are stored in membrane-bound structures called <u>Secretory vesicles.</u>
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The head, which forms the outer and inner lining, is 'hydrophilic' (water-loving), while the tail facing the interior of the cell membrane is 'hydrophobic' (water-hating).
All lipid molecules in cell membranes are amphiphilic (or amphipathic). That is, they have a hydrophilic (“water-loving”) or polar end and a hydrophobic (“hydrophobic”) or non-polar end.
Cells contain membrane-bound structures called cellular organelles and more complex chemicals. Organelles are sometimes referred to as subunits within cells designed to perform specific functions.
Channel-forming proteins can be used to facilitate the transport of water and other hydrophilic molecules. These channels are often gated to regulate transport rates. In facilitated transport, a hydrophilic molecule binds to a 'carrier' protein. This is a form of passive transport.
Learn more about Secretory vesicles here;
brainly.com/question/16633637
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