# Posts by Issac

Total # Posts: 21

**Chemistry**

Why was the tert butyl chloride washed with aqueous sodium hydrogen carbonate? what gas was evolved during the washing? Write a balance equation

**Calc**

Set up an exponential function to model each real world situation. 1) A mosquito population doubles every 10 days. Two mosquitoes of the opposite sex begin the process. Function: 2 x 2^t/100 2) Given the current inflation rate (~3%), prices double every 23 years. A loaf of ...

**Calc**

Set up an exponential function to model each real world situation then use it to find the requested values. The half-life of Carbon 14 is about 5700 years. You begin with 800 grams of this isotope. 1) Function: 2) How much Carbon 14 is there after: a) 11,400 years b) 45,000 years

**Radicals**

Express in simplest radical form. Do NOT give decimal approximations. 1. n^3/4 p^5/4 2. (3r)^2/5 s^3/5 3. (1/32)^0.2 4. 140^-1/2

**Chemistry**

For the diagram of NaCl (I didn't look at the second link if that would help me with this question, yet) would me drawing what Na and Cl look like in the arrangement of their atoms before and after they combine be good enough?

**Chemistry**

These are all review questions for my summer assignment. Do not know: !) Explain what an ionic lattice is and include a diagram. 2)Draw a diagram to show how Na and CL2 combine to form NaCl Unsure: !)Select two compounds and explain when Roman numerals are used in the name of ...

**Math**

IN A CLASS OF 36 GIRLS,18 PLAY NET BALL , 16 PLAY TABLE TENNS WHILE 8 GIRLS PLAY NEITHER THE TWO GAMES. FIND THE NUMBER OF GIRLS WHO PLAY

**Mathematics**

If the 9th term of an A.P is five times the 5th term. Find the relationship between a and d?

**physics**

Assume that a particular crash test expert can withstand 18 times the acceleration due to gravity. Find the shortest distance over which her car can be brought to a stop from a speed of 78 km/h without the acceleration exceeding 18g.

**physics**

A stunt car driver drives off an h = 6.7 m-high cliff into a lake with a horizontal speed of 14 m/s. The car needs to clear an 8.0 m-long ledge that is 5.0 m below the edge of the cliff. The car successfully misses the ledge on the way down. With what speed does the car hit ...

**Calc**

Find the point on the line –2x+2y–3=0 which is closest to the point (–4–4). Please provide solution. ( , ) Thanks guys!

**6th Grade Math**

Will a 2-quart pitcher hold the entire recipe of citrus punch given at the right explain your reasoning

**social studies**

what is the definition of canopy road

**geography**

I bet it does but if you have any kids youd know how hard it is so ill tell it. Rome's geography is important because it was surrounded by land and it was unable to be attacked by pirates but not to far from water.

**4th grade math**

Marla

**writing**

i am inthe 4th grade and need to write a composition. Can someone out there tell me what it is and give me an example.

**math**

3 times a number is

**English**

Write a paragraph with the following subject, occasion, audience, and purpose. Subject: food safety Occasion: aftermath of an outbreak of sickness at fast food restaurants due to tainted meat Audience: FDA (agency that manages food safety) Purpose: Persuade audience to do a ...

**math**

234qt=

**chemistry**

1. A three-step mechanism has been suggested for the formation of carbonyl chloride: Step 1: Cl2 ===> 2 Cl (fast equlibrium) Step 2: Cl + CO ===> COCl (fast equilibrium) Step 3: COCl + Cl2 ===> COCl2 + Cl (slow) What is the molecularity of the rate-determining step? ...

**half-life**

1. The half-life of a first-order reaction is 9.89 minutes. How many minutes will have elapsed after 27 half-lives? My answer is 267.03. 2. The half-life of a second-order reaction is 2.508 days. How many days will have elapsed after 8 half-lives? My answer is 5.330. Is this ...