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3 years ago

What is an ideal gas? how many ideal gases are there in the universe?

1 answer:

6 0

Ideal gases are hypothetical gases whose molecules occupy negligible space and have no interactions, and that consequently obeys the gas laws exactly.
Not exactly sure about the amount...
I hope this helps! :)

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In which way would a drought affect how rodents get their energy?

love history [14]

Answer:

<h3>When a drought occurs, their food supply can shrink and their habitat can be damaged. ... Losses or destruction of fish and wildlife habitat. Lack of food and drinking water for wild animals. Increase in disease in wild animals, because of reduced food and water supplies.</h3><h3>While insects and cacti might provide a meagre supply of water, most desert animals survive by being what Price calls "water misers". ... To perform this feat, they have evolved specialized kidneys with extra microscopic tubules for extracting water from urine.</h3>

Explanation:

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2 years ago

You are

timama [110]

Eye protection, fire proof clothing, proper foot gear, just anything that you could prevent yourself from being burned because you are working with flammable materials.

8 0

2 years ago

Which of the following are correct for zero-order reactions?

GREYUIT [131]

Answer:

The answer is "Choice A and Choice B"

Explanation:

The Zero-Order reactions are usually found if a substrate, like a surface or even a catalyst, is penetrated also by reactants. Its success rate doesn't depend mostly on the amounts of the various reaction in this reaction.

Let the Rate = k

As $\frac{dx}{dt} \ rate\ \ K_0$ doesn't depend on reaction rate, a higher reaction rate does not intensify the reaction.

By the rate $k_0 =\frac{dx}{dt},$ the created based and the reaction rate is about the same.

5 0

2 years ago

How many moles of Cu(OH)2 are soluble in 1L of sodium hydroxide (NaOH) when the pH is 8.23?

Morgarella [4.7K]

Answer:

4.96E-8 moles of Cu(OH)2

Explanation:

Kps es the constant referring to how much a substance can be dissolved in water. Using Kps, it is possible to know the concentration of weak electrolytes. Then, pKps is the minus logarithm of Kps.

Now, we know that sodium hydroxide (NaOH) is a strong electrolyte, who is completely dissolved in water. Therefore the pH depends only on OH concentration originating from NaOH. Let us to figure out how much is that OH concentration.

$pH= -log[H]\\pH= -log (\frac{kw}{[OH]})$

$8.23 = - log(\frac{Kw}{[OH]} \\10^{-8.23} = Kw/[OH]\\ [OH] = Kw/10^{-8.23}$

$[OH]=1.69E-6$

This concentration of OH affects the disociation of Cu(OH)2. Let us see the dissociation reaction:

$Cu(OH)_2 -> Cu^{2+} + 2OH^-$

In the equilibrum, exist a concentration of OH already, that we knew, and it will be added that from dissociation, called "s":

The expression for Kps is:

$Kps= [Cu^{2+}] [OH]^2$

The moles of (CuOH)2 soluble are limitated for the concentration of OH present, according to the next equation.

$Kps= s*(2s+1.69E-6)^2$

"s" is the soluble quantity of Cu(OH)2.

The solution for this third grade equation is $s=4.96E-8 mol/L$

Now, let us calculate the moles in 1 L:

$moles Cu(OH)_2 = 4.96E-8 mol/L * 1 L = 4.96E-8 moles$

7 0

3 years ago

7th grade science help me plsssss

tigry1 [53]

1. Organism: (description) an individual animal, plant, or single-celled life form.

(example) Humans, squids, mushrooms, and vascular plants

2. Population: (description) A population is all the inhabitants of a particular

place

(example) All institutionalized elderly with Alzheimer's

All people with AIDS

3. Community: (description) A community is a social unit with commonality such as norms, religion, values, customs, or identity. Communities may share a sense of place situated in a given geographical area or in virtual space through communication platforms.

(example) a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi

4. Ecosystem: (description) An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

(example) agroecosystem, aquatic ecosystem, coral reef etc.

5. Biosphere: (description) The biosphere is the worldwide sum of all ecosystem

(example) An example of the biosphere is where live occurs on, above and below the surface of Earth.

mark me brainliestttt :)))

5 0

3 years ago