CHEMISTRY HIGH SCHOOL

Which is the best example of water regulating an organism’s body temperature?

Answers

Answer 1

Answer: the best example is evaporation

Answer 2

Answer:

Answer

A!! A jogger sweating after a run

Explanation:

Edge

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When water evaporates at constant pressure, the sign of the change in enthalpyA. is negative.
B. is positive.
C. depends on the temperature.
D. depends on the volume of the container.
E. does not exist; that is, the enthalpy change is zero.

Answers

B. is positive
H20 (l)--> H20 (g)
when that happens, the heat is absorbed into the liquid to change the state of the liquid to gas; therefore, in order to change to a gaseous state, heat must be a reactant. and so enthalpy is increasing

You dissolve 0.74 g of potassium chloride (KCl) in 500 mL of water. What is the molarity of the solution?

Answers

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows:

Molarity = 0.74 g (1 mol / 74. 55 g) / 500mL (1 L / 1000 mL)

Molarity = 0.02 M

Answer:

0.02 M is the answer

Explanation:

Phytoplankton are microscopic photosynthesizing organisms that typically live in the upper layers of the ocean. What trophic level do phytoplankton belong to?Primary producers
Decomposers
Primary consumers
Secondary producers

Answers

Answer: Primary producers

A food chain is a linear series of transfer of food and energy when one organism is consumed by the other organism in an ecosystem. The energy is distributed among different tropic levels of the food chains.

Phytoplankton is a class of unicellular simple, autotrophic organisms which are found in water of ocean, lakes and or any other freshwater body. These includes dinoflagellates, diatoms, cynobacteria, green algae and others. These organisms are abundantly present in the ecosystem in the lower most trophic level. They are called as primary producers because they are consumed by other organisms such as zooplanktons, fishes and large sea mammals.

i think they are primary producers, as they produce biomass from inorganic compounds (CO2)

A major function of your nose is cleaning the air you breathe.
True
False