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Why is density of liquid water is greater than that ice 

What is demand in market?

What defferent between science and commerce..

@armansakib83638

How many nerves in a human body being active whole day ? 

Elaborate life theory 

What is ecosystem?

What is catalyzed?

What’s the total paying at closing?

find the length of longest pipe that can be carried level around a right angle corner of the two intersecting corridors are the width of 4 feet and 6 feet by calculus 

8.2.b Solution Concentration/ Molarity Name

Solve the following problems, showing all work clearly! CIRCLE your answers.

Molarity Calculations: M= mol/L

1.) A solution contains 96 grams of CH3OH in 2 Liters of solution. What is the molarity of this solution?

2.) What quantity (in moles) of potassium nitrate, KNO3, would you add to 350 mL of solution to prepare a 0.2-M

solution?

3.) How many grams of NaCl are required to make 450 mL of a 0.50-M solution?

4.) What volume of 1.80-M HC2H3O2 solution contains 0.6 moles of HC2H3O2?

5.) Calculate the molarity of a 1500 mL solution that contains 200 g of Magnesium Chloride.

Dilution Equations: M1V1 = M2V2

6.) Calculate the volume required to prepare 750 mL of a 2.5 M KClO3 solution from 5 M KClO3.

7.) A 10.0 mL sample of concentrated HI (5.51 M) is diluted to a final volume of 250.0 mL. What is the molarity

of the final solution?

8.) A 25.0 mL sample of concentrated H3PO4 (14.7 M) is diluted to a final volume of 500.0 mL. What is the

molarity of the final solution?

Explain how you would make the following solutions. You should tell how many grams of the substance you

need to make the solution, not how many moles. Rearrange the molarity equation to solve for moles.

9.) 2.0 L of 6.0 M HCl

10.) 1.5 L of 2.0 M NaOH

11.) 0.75 L of 0.25 M Na2SO4

Answer:

Answer:

Answer:

Answer:

Answer:

Answer:

Answer:

Answer:

Answer:

Answer:

How deep is the Mariana trench

what is science?

Data and Calculations (Part 1): include UNITS and show work where applicable.

1 tablet 2 tablets

(1) Measure the Circumference: (in centimeters)

(2) Calculate the radius of each balloon: (in cm)

r = circumference

2

(3) THEN, Convert the radius to dm (divide by 10)

(4) Calculate the volume of each sphere: (dm3)

V = 4r3

3

(5) Use the Ideal Gas Law to calculate # of moles (n):

(in moles)

PV = nRT

where P = 101.3 kPa

R = 8.31 (dm3 x kPa / mol x K) and T = 293 K.

(6) Calculate mass of CO2 (g) produced by multiplying

# of moles by its molar mass. (in grams)

Record in table below in Actual mass (Yield)

of CO2.

Calculations (Part 2):

(7) Refer to the balanced chemical equation for this reaction:

3NaHCO3(aq) + H3C6H7O7(aq) → Na3C6H7O7(aq) + 3CO2(g) + 3H2O(l)

Determine the mass of CO2(g) that can be formed from one tablet if it contains 1.9 grams of NaHCO3(s) and 1.0

grams of H3C6H7O7(s). Show your work below. Record this as your theoretical yield. (Hint: This is a limiting

reactant problem. The lowest mass is the MAX product.)

(8) Determine your percent yield for each reaction. Be sure to change the theoretical mass to 2 tablets

# of Tablets

Actual Mass (Yield) of

CO2(g)

(Answer from #6)

Theoretical Yield of CO2(g)

(calculated in #7)

Percent Yield of CO2(g)

% 𝒚𝒊𝒆𝒍𝒅 =

𝒂𝒄𝒕𝒖𝒂𝒍

𝒕𝒉𝒆𝒐𝒓𝒆𝒄𝒕𝒊𝒄𝒂𝒍 × 𝟏𝟎𝟎

Mass of 1

tablet =

Mass of 2

tablets =

(9) How does the Percent yield reflect the success or error of your experiment and suggest WHY it is not

what you expected?

How fast is a sneeze?

a 1 mile per hour

b 10 miles per hour

c 60 miles per hour

d 100 miles per hour

What does your spine do?

a Lets you stand up

b Lets you bend and twist

c Protects your spinal cord

d All of the above

About how many taste buds are on your tongue?

a 10

b 100

c 10,000

d 10 million

How much does your hair grow in one year?

a 2 inches

b 4 inches

c 6 inches

d 8 inches

6 + x = 6

Choose an action to perform

I’m what ways can you increase volume of a gas?

Increase temperature

Lower temperature

Lower pressure

Increase pressure

What pressure is needed to compress 5.25 L of gas at 1.77 atm to a volume of 0.0100L? Temperature is held constant

9.5 Area Applications HW

I need help on myphyics home work?can I please get help

x - 2 = 3

Choose an action to perform

What is anatomy

How many grams of water will be needed to saturate 25 grams of KBr at 65 Celsius?

90

27.7

2500

74

How many grams of KNO3 will dissolve in 50 grams of water at 70 Celsius?

160g

62.5g

45g

80g

You make a saturated solution of KCI at 10 Celsius. How many more grams of KCI could be dissolved if the temperature were raised to 100 Celsius?

28

30

58

13

Write the statements which are true about the lines of symmetry of a regular pentagon?

Who is best music director ?

What is science

What is computer 

z = 3 - 1

Choose an action to perform:

X - 6 = 9

Choose an action to perform

Write the state of matter

What happened to HRM beginning and growth in ethiopia

when and where did hrm is said to be started in ethiopia

Python programming important notes do you want?

Choose action

6 x 3 + 3

Choose an action to perform

18 divide by 2 + 7

Choose an action to perform

As a student, how will contribution for the farmer?