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Lena [83]
3 years ago
7

Determine the total volume in milliliters of water a chemist should add if they want to prepare an 0.200 M aqueous solution with

30.2 g of NaCI? Assume the density of the resulting solution is the same as the water.
PLEASE WRITE THE EQUATION!!!!
Ill mark brainliest too
Chemistry
2 answers:
olchik [2.2K]3 years ago
8 0

\\ \tt\rightarrowtail Molarity=\dfrac{Mass}{Molar\:mass\times Volume}

\\ \tt\rightarrowtail Volume=\dfrac{Molarity(Molar\:mass)}{Mass}

\\ \tt\rightarrowtail Volume=\dfrac{0.2(58.5)}{30.2}

\\ \tt\rightarrowtail Volume=0.387L

  • Volume=387mL
abruzzese [7]3 years ago
4 0

Answer:

Which of these sentences from the excerpt most strongly supports the correct answer to Question 5?

Answer choices for the above question

Quesiton 5 says

Which of these inferences about the author’s point of view is best supported by the entire excerpt?

From: The Immortal Life of Henrietta Lacks" lesson

A. “She’s simply called HeLa, the code name given to the world’s first immortal human cells—her cells, cut from her cervix just months before she died.”

B. “I’ve spent years staring at that photo, wondering what kind of life she led, what happened to her children, and what she’d think about cells from her cervix living on forever—bought, sold, packaged, and shipped by the trillions to laboratories around the world.”

C. “One scientist estimates that if you could pile all HeLa cells ever grown onto a scale, they’d weigh more than 50 million metric tons—an inconceivable number, given that an individual cell weighs almost nothing.”

D. “All of the stories mentioned that scientists had begun doing research on Henrietta’s children, but the Lackses didn’t seem to know what that research was

Explanation:

Which of these sentences from the excerpt most strongly supports the correct answer to Question 5?

Answer choices for the above question

Quesiton 5 says

Which of these inferences about the author’s point of view is best supported by the entire excerpt?

From: The Immortal Life of Henrietta Lacks" lesson

A. “She’s simply called HeLa, the code name given to the world’s first immortal human cells—her cells, cut from her cervix just months before she died.”

B. “I’ve spent years staring at that photo, wondering what kind of life she led, what happened to her children, and what she’d think about cells from her cervix living on forever—bought, sold, packaged, and shipped by the trillions to laboratories around the world.”

C. “One scientist estimates that if you could pile all HeLa cells ever grown onto a scale, they’d weigh more than 50 million metric tons—an inconceivable number, given that an individual cell weighs almost nothing.”

D. “All of the stories mentioned that scientists had begun doing research on Henrietta’s children, but the Lackses didn’t seem to know what that research was

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PLEASE HELP :)) WILL GIVE BRAINLIEST
hjlf

Answer:

the answer is true

5 0
3 years ago
química: compara y contrasta la investigación básica, investigación aplicada y el desarrollo tecnológico. razonamiento crítico.​
mihalych1998 [28]
This isn’t anything related to chemistry dude
7 0
3 years ago
If you had 240 L container at 479 k and 300 kpa, what would the volume be if you changed the conditions to STP
nydimaria [60]

Answer:

The answer to your question is V2 = 434.7 l

Explanation:

Data

Volume 1 = V1 = 240 l                             Volume 2 = ?

Temperature 1 = T1 = 479°K                   Temperature 2 = T2 = 293°K

Pressure 1 = P1 = 300 KPa                      Pressure 2 = P2 = 101.325 Kpa

Process

1.- Use the combined gas law to solve this problem

                P1V1/T1 = P2V2/t2

-Solve for V2

               V2 = P1V1T2 / T1P2

2.- Substitution

                V2 = (300)(240)(293) / (479)(101.325)

3.- Simplification

                V2 = 21096000 / 48534.675

4.- Result

                V2 = 434.7 l

6 0
3 years ago
what is the balanced equation that represents the reaction hydrogens and nitrogen to make ammonia (NH3)
KengaRu [80]

Answer: N2 + 3H2 —> 2NH3

Explanation:

4 0
3 years ago
It is composed of an alloy that is 90% Platinum and 10% Iridium; having a density of 21.186 g/cm3. What is the volume of the Sta
oksian1 [2.3K]
The alloy has a density of 21.186g/cc. So for a kilogram or 1000 grams/21.186 g/cc= 45.7 cc. So the answer is 45.7 cc of the allow to make up a kilogram which shows that the density of the allow can be used to calculate the volume of a larger mass ie the kilogram. 
7 0
3 years ago
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