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2 years ago

How many electrons, protons and neutrons does the element Argon have?

Chemistry

1 answer:

erik [133]2 years ago

8 0

Answer:

18 Protons

18 Neutrons

18 Electrons

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What biological processes can add co2 to the atmosphere?

RSB [31]

Cellar respiration simple if u need explanation just search up

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3 years ago

Consider the following reaction at 298 K:

faltersainse [42]

Answer :

$\Delta S_{sys}$ = -1622.8 J/K

$\Delta S_{surr}$ = -94.6 J/K

$\Delta S_{univ}$ = 0 J/K

Explanation : Given,

$\Delta H$ = -483.6 kJ

The given chemical reaction is:

$2H_2(g)+O_2(g)\rightarrow 2H_2O(g)$

First we have to calculate the value of $\Delta S_{sys}$ .

$\Delta S_{sys}=\frac{\Delta H}{T}$

$\Delta S_{sys}=\frac{-483.6kJ}{298K}$

$\Delta S_{sys}=-1.6228kJ/K=-1622.8J/K$

Entropy of system = -1622.8 J/K

As we know that:

Entropy of system = -Entropy of surrounding = 1622.8 J/K

and,

Entropy of universe = Entropy of system + Entropy of surrounding

Entropy of universe = -1622.8 J/K + (1622.8 J/K)

Entropy of universe = 0

8 0

3 years ago

In preparation for a blizzard, a city dispatches a crew to spread salt on the street surface of the bridges around town . The sa

4vir4ik [10]

I believe it is A because 32C would be way too much and it wouldnt go down to -5

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3 years ago

molecules that resemble fats but contain phosphate functional groups are called: a. steroids. b. polypeptides. c. phospholipids.

Rom4ik [11]

The answer is C. Phospholipids because Lipids mean "Fat"

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3 years ago

Read 2 more answers

How many grams of a stock solution that is 87.5 percent H2SO4 by mass would be needed to make 275 grams of a 55.0 percent by mas

Mandarinka [93]

<span>We're diluting the first solution to make the second solution. This means both solutions will contain the same amount of H2SO4 (it's the concentration of it that changes). If you look at it this way, it's easy to find the unknown mass. Call this unknown mass m. m * 0.875 = 275 g * 0.55 --> m = 173 g What I'm saying here is 87.5% of the mass of the first solution needs to be the same as 55% of the mass of the second solution, because you're using the same amount of H2SO4 in both.

Please mark this brainliest!

</span>

3 0

3 years ago