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lbvjy [14]
3 years ago
8

Which of these can be classified as a pure substance?

Biology
2 answers:
disa [49]3 years ago
7 0

Answer:

A compound is the answer

Explanation:

solution = liquid and something that dissolves

homogeneous mixture = mixture is literally in the name so no

compound = CORRECT ANSWER

heterogeneous mixture = mixture is literally in the name so no

Tasya [4]3 years ago
7 0

Answer:

compound

Explanation:

i took the test

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4. Which material dissolves<br> most substances in chemical<br> weathering?
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Chloride ions, Cl-, follow actively transported Na+ ions from the nephrons into the blood. Would you not expect the Cl- concentr
DerKrebs [107]

Answer:

Bicarbonate ion, HCO3- (which has a similar charge to chloride ions) also follow sodium ions into the blood. Also, potassium ions, K+ are transported into the nephron so some chloride ions and bicarbonate ions remains in the nephron to balance the charge.

Explanation:

Sodium is the primary positively charged electrolyte in extracellular fluid. Most of the solute reabsorbed in the proximal tubule is in the form of sodium bicarbonate and sodium chloride. Water is also reabsorbed in order to balance osmotic pressure

When sodium ions are reabsorbed into the blood, few of the substances that are transported with Na+ on the membrane facing the lumen of the tubules include Cl- ions, Ca2+ ions, amino acids, and glucose. Sodium is actively exchanged for K+ using ATP on the basal membrane.

In the distal convoluted tubule, K+ and H+ ions are selectively secreted into the filtrate, while Na+, Cl-, and HCO3- ions are reabsorbed to maintain pH and electrolyte balance in the blood.

Some chloride ions remains in the nephron to balance the charge of the secreted K+ ions and also due to the bicarbonate ions that are removed.

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What is the component of the body’s metabolism that provides the energy required to maintain essential body processes such as re
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