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3 years ago

Which of the following became a major drawback to using ice blocks for cooling food? availability expense unsanitary ice storage

2 answers:

7 0

Ice was soon being harvested from contaminated water sources. Microbes in the ice invaded the food and people became ill
so unsanitary ice is your answer i hope this helps

Mashcka [7]3 years ago

5 0

Answer: Option (d) is the correct answer.

Explanation:

Since it is known that ice blocks used to cool food items are prepared or manufactured by shopkeepers. So, the water used to prepare ice might not be pure and therefore, we can say that the water used in these blocks is contaminated.

Hence, when we place out food on these ice bags then the food might also become unhygenic in nature.

Thus, we can conclude that ice storage became a major drawback to using ice blocks for cooling food.

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The specific heat of aluminum is 0.897 j/g•°c. which equation would you use to calculate the amount of heat needed to raise the

Varvara68 [4.7K]

c. q = 0.75 g x 0.897 j/g•°c x 22°c

7 0

3 years ago

Convert 11.03 moles of calcium nitrate to grams

hichkok12 [17]

Im pretty sure the answer is 0.01218859659g

not 100% sure tho so please consult someone else b4 answering
i hope this helps!!

6 0

3 years ago

Read 2 more answers

I need an example of a chemical change involving water.Pleaseeee.

slava [35]

Chemical change occur when two substances are combined and produces a new substance or decomposes into two or more substances which are entirely different from the original two substances.

There are three types of chemical changes. These are 1) Inorganic Changes, 2) Organic Changes, and 3) Biochemical Changes

Here are some examples of chemicsal changes.

If you combine Sodium and Water, chemical changes causes decomposition into Sodium Hydroxide and Hydrogen.

Sodium + Water ==> Sodium Hydroxide and Hydrogen

Na + H2O ====> NaOH and H

Another example of chemical change is:

Carbon Dioxide and Water will decompose into Sugar and Oxygen

Carbon Dioxide + Water ==> Sugar and Oxygen

CO2 + H2O ==> CnH2nOn (where n is between 3 and 7) and O

7 0

2 years ago

6. The nuclear reaction where Si-30 becomes P-30 is

Arisa [49]

Answer:c

Explanation:

8 0

2 years ago

g On the basis of their respective pKa values, determine which is the stronger acid, acetic acid (pKa 5 4.7) or benzoic acid (ma

ozzi

Answer:

Benzoic acid is the stronger acid

Explanation:

Weak acids do not dissociate completely in the solution. They exists in equilibrium with their respective ions in the solution.

The extent of dissociation of the acid furnising hydrogen ions can be determined by using dissociation constant of acid ( $K_a$ ).

Thus for a weak acid, HA

$HA \rightleftharpoons A^- + H^+$

The $K_a$ is:

$K_a= \frac{[A^-][H^+]}{[HA]}$

The more the $K_a$ , the more the acid dissociates, the more the stronger is the acid.

Also,

$pK_a$ is defined as the negative logarithm of $K_a$ .

So, more the $pK_a$ , less is the $K_a$ and vice versa

All can be summed up as:

The less the value of $pK_a$ , the more the $K_a$ is and the more the acid dissociates and the more the stronger is the acid.

Given,

$pK_a$ of acetic acid = 54.7

$pK_a$ of benzoic acid = 54.2

$pK_a$ of benzoic acid < $pK_a$ of acetic acid

So, benzoic acid is the stronger acid.

5 0

3 years ago