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Eva8 [605]
2 years ago
10

What mass of na2so4 is needed to prepare 350. ml of a solution having a sodium ion concentration of 0.125 m?

SAT
2 answers:
Dima020 [189]2 years ago
5 0

Answer and Explanation:

6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution.

You have to know that molarity is a measure of the concentration of a solute that is defined as the number of moles of solute that are dissolved in a certain volume.

number of moles of solute= 0.125 M×0.350 L=0.04375

142 g/mole is the molar mass of Na₂SO that's the mass of one mole of the compound and the amount of mass that contains 0.04375 moles. Mass= 0.04375 moles× 142 g/mole therefor mass= 6.2125 g.

So, 6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution having a sodium ion of  0.125 M

Please let me know if I did anything wrong. I'm pretty sure I'm right but I cant always be sure.

jenyasd209 [6]2 years ago
3 0

Answer:

6.2125 g

Explanation:

6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution having a sodium ion concentration of  0.125 M.

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mike lives in the northern united states (in minnesota) and nick lives in the southern united states (louisiana). when they both
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The answers are hyper cortisol response and  higher levels of physical aggression.

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When the body is exposed to excessive quantities of the hormone cortisol for an extended period of time, hypercortisolism, also known as Cushing syndrome, develops.

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Cortisol is a stress-inducing hormone, according to research on hormones in the human body. Now, it has been proved that when it is hot in the summer, the cortisol hormone circulates in the blood in a very significant amount. This can result in frustration as well as physical hostility.

Thus, the answers are hyper cortisol response and  higher levels of physical aggression.

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5 0
2 years ago
the height of a bottle rocket, in meters, is given by the function s(t)=−9t2+103t+403. find the average velocity of the bottle r
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The average velocity of the bottle rocket are two given time intervals is 30 m/s and 20 m/s respectively, while the instantaneous velocity at 4.5 seconds is 22 m/s.

The given parameters;

  • s(t) = -9t² + 103t + 403
  • time interval (4.499, 4.5), and (4.5, 4.501)

The average velocity of the bottle rocket over the intervals is calculated as follows;

when the interval = [<em>4.499, 4.5</em>]

s(4.499)= -9(4.499)^2  + 103(4.499) + 403 = 684.22 \ m\\\\s(4.5) =  -9(4.5)^2  + 103(4.5) + 403 = 684.25 \ m

v = \frac{\Delta \ s}{\Delta \ t} = \frac{684.25 - 684.22}{4.5 - 4.499} = 30 \ m/s

when the interval = [<em>4.5, 4.501</em>]

s(4.5) = -9(4.5)^2 + 103(4.5) + 403 = 684.25 \ m\\\\s(4.501) = -9(4.501)^2 + 103(4.501) + 403 =684.27 \ m\\\\v= \frac{684.27 - 684.25}{4.501-4.5} \\\\v = 20 \ m/s

The instantaneous velocity of the bottle rocket at time t=4.5;

v = \frac{d \ s(t)}{dt} = -18t + 103\\\\v(4.5) = -18(4.5) + 103\\\\v(4.5) = 22 \ m/s

Thus, the average velocity of the bottle rocket are two given time intervals is 30 m/s and 20 m/s respectively, while the instantaneous velocity at 4.5 seconds is 22 m/s.

Learn more here: brainly.com/question/25009886

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Answer:

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3 years ago
Read 2 more answers
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