maybe 1+8 (4+548) 4/6 4+4
Organic compounds essential to human functioning include carbohydrates, lipids, proteins, and nucleotides. These compounds are said to be organic because they contain both carbon and hydrogen
C. All the known elements that exist in the world today
Answer:
Change in temperature, ΔT = 22.8°C,
Reaction is endothermic.
Explanation:
The amount heat is given by the formula;
q = m×c×ΔT
Where, q is the amount of heat
m is the mass of a substance
c is the specific heat capacity
ΔT is the temperature change.
In this case, making ΔT the subject of the formula, we get;
ΔT = q/m×c
but; q = 868 Joules
m = 15.6 g
c = 2.44 J/g°C
Therefore;
ΔT = 868 J/(2.44 J/g°C × 15.6 g)
= 22.8 °C
Therefore, the temperature change for ethanol is 22.8 °C
This means there is an increase in temperature and therefore the reaction is endothermic.
Answer:
The best answer is "E"
NaCl leaves the ascending limb of the loop of Henle through active transport.
Explanation:
The loop of Henle is a U-shaped portion of the tubule that conducts urine within each nephron. It's principal function is the recovery of water and sodium chloride from the urine.
The ascending limb is impermeable to water. NaCl is pumped from the tubule into the interstitium in the ascending limb by active transport. This active transport enables the kidney to establish an osmotic gradient which enables the permeability of water and urea thereby allowing the kidneys to concentrate the urine.