An isotope of the element Thallium , TI-206 , undergoes beta decay with a half life of 3.1 minutes . Assume you begin with 48.

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5.

An isotope of the element Thallium , TI-206 , undergoes beta decay with a half life of 3.1 minutes . Assume you begin with 48.00 grams of the thallium isotope , what mass of the isotope will be left after 9.3 minutes have elapsed?

Report your answer to 2 decimal places.

6.

Assume that a 25.0 volt energy source is in a circuit that has a resistance of 5.00 ohms . Determine the power consumption in watts.

Report your answer to 2 decimal places.

7.A solution has a hydroxide-ion concentration of 1.0 x 10-4 mol per liter. What is the pH of the solution?

Report your answer to 2 decimal places

You are directed in a lab procedure to add 4ml of water into a test tube. Which is the best measuring device for this job?

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You are directed in a lab procedure to add 4ml of water into a test tube.  Which is the best measuring device for this job?

A.fill a 2ml serologic pipette 2 times

B.a 1ml in 1/10 serological pipette filled 4 times

C.a 5ml in 1/10 serologic pipette

D. 4 squirts of a disposable eyedropper

E. a Pipetman pipette

You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball.

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You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 35° from the edge of the building with an initial velocity of 13 m/s and lands 55 meters away from the wall. How tall is the building that the child is standing on?

You and your friend Peter are putting new shingles on a roof pitched at 22 . You’re sitting on the very top of the roof when Peter, who is at the…

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You and your friend Peter are putting new shingles on a roof pitched at 22 . You’re sitting on the very top of the roof when Peter, who is at the edge of the roof directly below you, 5.5 away, asks you for the box of nails. Rather than carry the 2.5 box of nails down to Peter, you decide to give the box a push and have it slide down to him.

1) Using only a periodic table (without referring to the Electronegativity Table unless necessary) indicate the polarity of the bonds shown below. If…

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1) Using only a periodic table (without referring to the Electronegativity Table unless necessary) indicate the polarity of the bonds shown below. If the bond is nonpolar, say so:

a) N-O

b) C-O

c) C-S

d) Cl-I

e) H-Cl

f) H-K

2) Sketch each species to show correct molecular geometry, bond dipoles and then state whether each species is polar or nonpolar. If resonance structures exist, use the most stable one:

a) NH3

b) COS

c) ClBr2

1- According to the SDS for HCl, a solution of 37% HCl can be poured down the drain. True False 2- What are the NFPA ratings for sodium hydroxide

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1- According to the SDS for HCl, a solution of 37% HCl can be poured down the drain.

  • True
  • False

2- What are the NFPA ratings for sodium hydroxide pellets?

Report the following in each blank:

Blank # 1: Health

Blank # 2: Fire

Blank # 3: Reactivity

Question 25 options:

Blank # 1——-

Blank # 2——-

Blank # 3———

3- Question 23 options:

Sigma Aldrich is a popular chemical manufacturer. Go to the website (https://www.sigmaaldrich.com/united-states.html) and search for the chemical hydrochloric acid, ACS Reagent 37%. Open the Safety Data Sheet (SDS). Use the SDS to complete the following sentence:

The density of HCl is ———–

Which of the following is an inappropriate use of glassware?

  • Over-tightening a clamp to the glassware.
  • Quench a beaker in ice after heating directly under a bunsen burner.
  • Check the glassware for flaws before use.
  • Pick-up broken glass with your hands.

5- Which of the following is false regarding appropriate use of a pipet?

  • Use a pipet pump to draw liquid into the pipet.
  • Use your finger to stopper the pump before dispensing liquid
  • Use your mouth to dispense liquid.
  • All of the above.

Leadership Portfolio 2 (LP 2) Grading Rubric Unsatisfactory: 0-60% Effective Leader Definition Assessment Results Section not complete Needs…

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This part of the Leadership Portfolio will require you to be introspective about your leadership strengths and areas for development. You will be asked to write a self-assessment based on the results of several instruments.

  • Attachment 1
  • Attachment 2

Inventory valuation methods allow management to select a method that best fits their business model.

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Inventory valuation methods allow management to select a method that best fits their business model. Gen the following data, what is the value of the ending inventory as determined by the first in first out (FIFO) method?Sale revenue

Stewie is making a 2 M plutonium chloride solution in a 100 mL volumetric flask (for no particular reason). The dilution is quite endothermic.

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Stewie is making a 2 M plutonium chloride solution in a 100 mL volumetric flask (for no particular reason). The dilution is quite endothermic. He fails to wait for the solution to reach the appropriate temperature before making it up to the mark. How would this effect the concentration of the resultant solution? Explain.