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Travka [436]
2 years ago
8

Jams, jellies, preserves, honey, and other food with high sugar content hardly ever become contaminated by bacteria, even when t

he food containers are left open at room temperature. This is because bacteria that encounter such an environment ___________.
Chemistry
1 answer:
creativ13 [48]2 years ago
8 0

Answer:

undergo death as result of the water loss from cell

Explanation:

The ingredients such as honey, jellies, Jams, preserves and other food which have high sugar content are contaminated hardly by the bacteria because due to the presence of high amount of the sugar and carbohydrates, the solution of the them becomes hypertonic in nature and if a bacteria acts on such solution, the result is the loss of the water from their cell and ultimately the bacteria dies. So, they remain fresh even if their containers are left open at the room temperature.

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Calculate the pH of a solution that is 0.210 M in nitrous acid (HNO2) and 0.290 M in potassium nitrite (KNO2). The acid dissocia
jeka94

Answer:

pH = 3.49

Explanation:

We have a buffer system formed by a weak acid (HNO₂) and its conjugate base (NO₂⁻ coming from KNO₂). We can calculate the pH  of a buffer ssytem using the Henderson-Hasselbach equation.

pH = pKa + log [base] / [acid]

pH = -log Ka + log [NO₂⁻] / [HNO₂]

pH = -log 4.50 × 10⁻⁴ + log 0.290 M / 0.210 M

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6 0
3 years ago
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Answer:

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6 0
3 years ago
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scoundrel [369]
B. Sugar is a pure substance.
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7 0
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