Of the following, which has the highest entropy?NaCl(s)

NaCl(aq)

NaCl(l)

NaCl(g)

Answers

Answer 1

Answer: The higher the order, the lower the entropy. Solids are most orderly and gases are least orderly, with liquids and aqueous in between. That said, NaCl(g) would have the highest entropy.

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After being thoroughly stirred at 10.°C, which mixture is heterogenous?(1) 25.0 g of KCl and 100. g of H2O(2) 25.0 g of KNO3 and 100. g of H2O
(3) 25.0 g of NaCl and 100. g of H2O
(4) 25.0 g of NaNO3 and 100. g of H2O

Answers

The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 g.

Answer:

Explanation:

Because if look at the Solubity curves you will notice other three doesn't go 25 grams. They start above the 25 grams.

Compared with saturated hydrocarbons, an unsaturated carbon has _____ ratio of hydrogen atoms to carbon atoms.

Answers

carbon has lower ratio of hydrogen atoms to carbon atoms

One of the first labs to analyze oxygen consumption was

Answers

Answer:

One of the first labs to analyze oxygen consumption was established by Lavoisier and Laplace in the late 18th century.

Explanation:

Final answer:

Initial laboratories studying oxygen consumption used innovative techniques, such as isotope tracers, and advanced equipment, such as respirometers, to examine various organisms and processes. Renowned scientist Mildred Cohn played a crucial role in this early research, providing insights into metabolic pathways and enzyme mechanisms.

Explanation:

The first labs to investigate oxygen consumption studied a variety of concepts and organisms. Pioneering this study, Mildred Cohn made significant discoveries utilizing isotopes as tracers in reactions. This strategy provided invaluable insights into metabolic pathways and enzyme mechanisms. Specifically, this strategy was used to understand the phosphorylation of glucose in mitochondria.

The respirometer is an essential tool in measuring oxygen consumption. In an experiment conducted in a laboratory, mice were used to observe the respiration levels at different temperatures. This was done by tracking the volume of oxygen each mouse consumed over multiple five-minute trials.

Also, oxygen consumption in humans can be combined with our understanding of our digestive process. The energy humans and other organisms need to function normally is generated through the gradual oxidation of chemical compounds in the body. Oxygen acts as the ultimate oxidizing agent in these reactions, linking to our digestion and energy conversion processes.

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The oxygen saturation of a lake is found by dividing the amount of dissolved oxygen the lake water currently hasper liter by the dissolved oxygen capacity per liter of the water, and then converting that number into a percent. If the lake currently has 7.4 milligrams of dissolved oxygen per liter of water and the dissolved oxygen capacityis 9.4 milligrams per liter, what is the oxygen saturation level of the lake, to the nearest percent? Please help me with this one ;(

Answers

$(7.4)/(9.4)*100\%= (7.4*100)/(9.4)\%= (740)/(9.4)\%\approx78.72\%\approx79\%$

Final answer:

To find the oxygen saturation level of the lake, divide the amount of dissolved oxygen in the lake's water per liter (7.4 mg/L) by the water's dissolved oxygen capacity per liter (9.4 mg/L) to get the proportion. Multiply this by 100 to convert it into a percentage (78.72%), which rounds to 79% saturation.

Explanation:

To calculate the oxygen saturation of the lake, we divide the amount of dissolved oxygen the lake water currently has per liter by the dissolved oxygen capacity per liter of the water, and then we convert that number to a percentage.

Here are the steps to solve this problem:

First, divide the amount of dissolved oxygen the water currently has (7.4 milligrams per liter) by the dissolved oxygen capacity (9.4 milligrams per liter). This will give you the proportion of oxygen in the water. This step is a simple division: 7.4 ÷ 9.4 = 0.7872 (rounded to the nearest four decimal places).
Next, multiply the result by 100 to convert the proportion into a percentage. This step is 0.7872 x 100 = 78.72% (rounded to the nearest hundredth).
However, your question asks to round to the nearest percent, so the final answer would be 79% when rounded to the nearest percent. Thus, the oxygen saturation level of the lake is 79%.
Note that this oxygen saturation is important to many aquatic organisms that need oxygen from the water to survive.

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What is a disadvantage of using a structural model to show a chemical compound? Structural models provide minimal three-dimensional information. Structural models do not identify the number and type of each atom. Structural models cannot distinguish between single, double, and triple bonds. Structural models cannot distinguish between different isomers of a compound.

Answers

The answer is the first: that structural models provide minimal three-dimensional information. This is because the ball-and-stick model cannot show the actual size of the atoms depicted in the model. You also cannot see the actual bond lengths between the atoms. This, then, limits the accuracy of the model and fails to precisely portray how the chemical compounds being shown are like in all actuality. Thus, though you do see a three-dimensional picture of the chemical compound, this picture is not completely accurate and is not scaled to size.

Answer: A - Structural models provide minimal three-dimensional information.

Explanation:

How do lungfish survie in intense heat

Answers

I believe they use Estivation

Defined: To spend a hot, dry season in an inactive, dormant state, as certain reptiles, snails, insects, and small mammals.

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