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nexus9112 [7]
3 years ago
5

If the prescribed dosage of milk of magnesia Mg(OH)2 is 3.5 moles, how many grams

Chemistry
1 answer:
OlgaM077 [116]3 years ago
3 0

Answer:

B

Explanation:

1 mole is equal to 58.31968 grams.

so 3.5 moles equal to answer choice B

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Mixture of 120 grams of KClO3 and 300 grams of water until all of the KClO3 has dissolved. At what temperature does this occur?
lozanna [386]

240°C is required to dissolve 120 grams of KClO₃ in 300 g of water.

Explanation:

As per the solubility curve graph of different salts dissolved in 100 g of water, it can be noted that the KClO₃ gets saturated at 100 °C with the solubility of 59 g in it. But here the water is taken as 300 g and the salt is taken as 120 g. The graph shows the solubility of grams of salt in 100 g of water.

So, then we have to find what is the gram of salt present in 100 g of water for the present sample.

300 g of water contains 120 grams of salt.

Then, 1 g of water will contain \frac{120}{300} g of salt.

Then, 100 g of water will contain \frac{120}{300}*100 of salt. This means, 100 g of water will contain 40 g of salt in it.

Then, if we check the graph, the corresponding x-axis point on the curve for the y-axis value of 40 g will give us the temperature required to dissolve the salt in water. So 80°C will be required to dissolve 40 g of salt in 100 g of water.

Then, in order to get the temperature required to dissolve 120 g in 300 g of water, multiply the temperature by 3, which will give the result as 80×3=240 °C.

So, 240°C is required to dissolve 120 grams of KClO₃ in 300 g of water.

8 0
3 years ago
What is temperature equilibrium?
Lunna [17]

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Pedro adds 3.23 moles of helium to a balloon that already contained 4.51 moles of helium creating a balloon with a volume of 9.8
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Answer:

7.The answer is 2.13 because if u add 3.23 and 4.51 and the answer is 7.74 and u add 2.13 to get 9.87. 3.23 + 4.51 + 2.13 is 9.87

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Romashka-Z-Leto [24]

Answer: a.Oxygen combines with carbon of simple sugar.

In cellular respiration, the presence of oxygen results in the break down of glucose molecule is broken down into carbon dioxide and water. The energy is required for this process that transforms the glucose in the form of ATP. The oxygen is required to produce ATP. Later on more energy is produced by the process of oxidative phosphorylation. ATP molecules transfers energy to the cells, which are the chief source of energy and also get used up in this process.  



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