Tanisha
Most popular questions and responses by Tanisha
chemistry
Given: *Fe2O3(s)+3CO(s)>2Fe(s)+3CO2(g)(delta h is 23kJ) *3Fe2O3(s)+CO(g)>2Fe3O4(s)+CO2(g)(delta h is 39kJ) *Fe3O4(s)+CO(g)>3FeO(s)+CO2 (delta h is 18kJ) Desired:FeO(s)+CO(g)>Fe(s)+CO2(g) find delta h for the desired reaction. which reactions do i
asked on March 26, 2008 
chemistry 106
The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting, that is, the conversion of ZnS to ZnO by heating. 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) ΔH = 879 kJ/mol Calculate the heat evolved (in kJ) per gram of ZnS
asked on March 3, 2010 
Maths
here are some of the ingredients for bolognese sauce 400g minced beef 800g chopped tomatoes 600ml Stock 300ml red wine Julie has only had 300g of minced beef how much of other ingredients should she use
asked on October 1, 2016 
chemistry 106
Dry air near sea level has the following composition by volume: N2, 78.08 percent; O2, 20.94 percent; Ar, 0.93 percent; CO2, 0.05 percent. The atmospheric pressure is 1.00 atm. (Hint: Since volume is proportional to the number of moles present, mole
asked on March 1, 2010 
business math
. Ludwig borrowed $8,000 on July 20, at 11% interest. If the loan was due on October 17, what was the amount of interest on the loan using the exact interest method?
asked on September 7, 2014 
PRE*******ALGEBRA
WRITE A FUNCTION RULE TO DESCRIBE EACH SITUATION. PLEASE HELP I DO NOT UNDERSTAND THIS AT ALL. The number of pounds p(z)as a function of the number of ounces z. The selling price s(c)after a 45% markup of an item as a function of the stores' cost c. The
asked on April 30, 2009 
Business Math
7. By using the table in the handbook, the present value of $12,000 for six years compounded at 6 percent semiannually is:
asked on October 4, 2012 
chemistry 106
Nitroglycerin, an explosive compound, decomposes according to the equation below. 4 C3H5(NO3)3(s) 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g) Calculate the total volume of gases when collected at 1.2 atm and 25°C from 1.3 multiplied by 102 g of nitroglycerin.
asked on February 28, 2010 
Social Studies Homework (About USA And Canada)
I need help with one question and I need one question answer checked! Social Studies Homework: 1)What are the two main languages of USA? Answer: English and Spanish 2)What are the two main languages of Canada? (Please give an direct answer for question 2
asked on December 29, 2006 
Math
I need help with my math homework.I searched for homework help forums and I found the Jiskha Website on the Google Website so this is my first time.I am new. Math Homework: What is the value of number 3 in 2,539? What is the value of number 9 in 4,879 What
asked on December 26, 2006 
Business Math
2. The interest on $6,000 at 6 percent compounded semiannually for 8 years is: (Use table in the handbook) (Points : 1)
asked on October 5, 2012 
chemistry 106
A 0.1589 g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g
asked on March 3, 2010 
chemistry 106
Methanol, ethanol, and npropanol are three common alcohols. When 1.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol. (a) methanol (CH3OH), 22.6 kJ (b) ethanol (C2H5OH),
asked on March 3, 2010 
chemistry 106
The pressure of 6.0 L of an ideal gas in a flexible container is decreased to onehalf of its original pressure, and its absolute temperature is decreased to oneseventh of the original. What is the final volume of the gas?
asked on February 28, 2010 
Math Pre Algebra
Find the simple interest. $900 deposited at an interest rate of 3% for 5 years. $1,348 deposited at an interest rate of 2.5% for 18 months.
asked on April 14, 2009 
english
what is a good thesis statement for jim crow laws?
asked on March 11, 2010 
Chemistry
If 23.7g of C8H18 are combusted, what mass of water will be produced?
asked on September 7, 2013 
chemistry 106
Which of the following standard enthalpy of formation values are not zero at 25°C? (Select all that apply.) H2(g) N2(g) Au(s) Be(s) H20(g) Ne(g)
asked on March 3, 2010 
Math  Pre Algebra
Simple and Compound Interest Find the simple interest. principal= $870 interest rate= 6% time= 9 months Please help me I need the answer for tommorow.
asked on April 13, 2009 
chemistry
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 4 state to the n = 3 state.
asked on March 23, 2010 
math
so if my question is find the dimensions of a box that will hold twice as many cubes as a box that is 2 by 6 by 4 a] volume of original box: 48 b]volume of new box is :96 c] dimensions of new box is 12 by 4 by 2
asked on October 7, 2008 
chemistry 106
A gasfilled balloon having a volume of 1.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are 23°C and 3.00 multiplied by 103 atm, respectively. Calculate the
asked on February 28, 2010 
Science
If a planet had a surface with craters but no other features, what could I say about the inside of the planet?
asked on April 14, 2009 
Cooking catering
When your creating garnishes which of the following is the most adaptable to creative and interesting shapes
asked on March 12, 2014 
math
show25 broken key is 5 show in 3 ways
asked on September 27, 2011 
Math
Find the dimensions of a box that will hold twice as many cubes as a box that is 2 by 6 by 4
asked on October 7, 2008 
Math Help!!!
How many 3 letter sequences can be formed if the first letter must always be a consonant (not a, e, i, o, u), the second letter must always be a vowel (a,e,i,o,u) and 3rd letter must be different from the first. A. 2100 B. 4056 C. 3250 D. 2625 I chose A...
asked on May 18, 2015 
math Help!!!!
You have 1 red marble, 1 blue marble, 1 yellow marble and 1 white marble. You draw 2 marbled out of the bag without replacing. What is the probability that you may choose 1 red marble?
asked on May 18, 2015 
Chemistry
A reaction has a standard freeenergy change of 11.80 kJ/mol (2.820 kcal/mol). Calculate the equilibrium constant for the reaction at 25 degrees C. Please help!
asked on November 9, 2011 
Please Help Me With My Math Homework
I wrote my math homework questions. It's in Jiskha Homework Help Forum In: Name:Tanisha Subject:Math Thank You! I already replied, you don't need to make a new question asking someone to answer...... Thanks for the answer! It was a good help! the product
asked on December 26, 2006 
chemistry 106
Calculate the work done if a gas is compressed from 8.3 L to 3.3 L at constant temperature by a constant pressure of 3.0 atm, and give your answer in units of joules. (1 L · atm = 101.3 J)
asked on March 3, 2010 
Accouning
Help Needed ASAP!!!There's too much questions to be asked.
asked on January 12, 2008 
statistics
Directional and nondirectional hypotheses can be easily interchanged according to the hypothesis the researcher is testing. For instance, a drug company might predict that a drug will help a subject lose weight while another drug company might predict that
asked on December 11, 2015 
chemistry 106
Determine the amount of heat (in kJ) given off when 2.23 multiplied by 104 g of ammonia are produced according to the following equation. Assume that the reaction takes place under standardstate conditions at 25.0°C. N2(g) + 3 H2(g) 2 NH3(g) ΔH°rxn =
asked on March 3, 2010 
math
what is .ooo552 in scientific notation
asked on March 1, 2010 
chemistry 106
calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.
asked on February 28, 2010 
Language Arts
what is free verse poetry? What are all of the examples of poetry?
asked on September 17, 2009 
math
Andy averages 17 points per game during 5 games of the basketball season. If he scored 12, 24, 20, 18 in four of the games. How many points did he score in the 5th game. 17 * 5 = 85 12 +24 +20 +18 +x = 74 8574 = 11
asked on May 15, 2015 
math
please help with daughters homework show 25 broken key is 5 show in 3 ways
asked on September 27, 2011 
Science
Why do astronomers need to use special methods to detect star systems?
asked on April 29, 2009 
Geography
How does climate types found in East Africa influence what grows there? Thank You in Advance to whoever helps me!!
asked on April 13, 2009 
Math  Pre Algebra
Thank you soo much!! But can you show me the steps on how to caculate 1280(1.13)^3.
asked on April 13, 2009 
Math  Pre Algebra
$1280 at 13% compound annually for 3 years Use the formula: B= p(1+r)n Please help me I need the answer for tommorow
asked on April 13, 2009 
math
5 kids median age is 9. Two of the kids ages are 5. The range of all the kids is 7. What is the age of the 2nd to the oldest. Please help....! a. 5 b. 7 c. 9 d. 12 to figure it out, i tried this 1. 12 2. 11 3. 9 4. 5 5. 5
asked on May 15, 2015 
Language Arts
what is an antonym for rationalize?
asked on September 8, 2009 
World History
which country had more than a dozen colonies in what is now the U.S along the atlantic coast by the mid1700s? a.holland b.britain c.spain or d.france
asked on May 31, 2009 
Intro to physical science
I need a relating topic to physical science that is relating to the reasl world?
asked on May 30, 2009 
Social Studies
what are the main resources of Sudan in East Africa?
asked on April 21, 2009 
Science
I have two questions. How can an atmosphere affect the temperature of a planet's surface? If a planet had a surface with craters but no other features, what could you say about the inside of the planet?
asked on April 14, 2009 
maths
In an A.P., the first term is 2 and the sum of the first five terms is onefourth of the next terms. Show that 20th term is 112.
asked on November 7, 2016 
math
Monday 4 degrees Fahrenheit increase 6 degrees. On Tuesday it increased 2 degrees. For the next 7 days it increased. What is the temperature on the 9th day?
asked on May 15, 2015 
2nd grade math homework
does the broken key 5 means not to use the number5
asked on September 27, 2011 
ALGEBRA 1
2/3+y=3/4
asked on September 17, 2009 
Algebra 1
solve this equation. show ur wrk work plz. 8y(2y3)=9
asked on September 17, 2009 
Pre Algebra
5xy=6 what is the equation in slope intercept form?
asked on April 29, 2009 
Social Studies
Why are foreign investors hesitant to invest in many countries in East Africa?
asked on April 28, 2009 
To:Jasmine20
Guru is like a master. Did you had help with the questions and answers of HINDU RELIGION? I mean the one you posted that you need another religion, not your religion did you got help? I think jasmine20 is not on jiskha I HAVE TO TRY AND FIGURE OUT SOME
asked on December 29, 2006 
inclusive language
Can you please verify if I have done this correctly 1. Each advisor was contacted by his students. my answer Each advisor was contacted by their students. or Each advisor was contacted by his or her students. His or her students, not their students
asked on November 22, 2006 
Maths probability
Records show that 8% of blood samples tested for a certain condition test positive. Assuming that whether or not a blood sample tests positive is independent of whether or not any other blood sample tests positive, calculate by hand the following
asked on January 16, 2017 
Math Help!!!
How many ways are there to choose a potato and two green vegetables from a choice of three potatoes and seven green vegetables? A. 126 B. 63 C. 21 D. 252 i chose A. But im 50% not sure Please help test tomorrow something similar
asked on May 18, 2015 
math...Please help!!!!
This is a standard deviation question. I don't know much about standard deviation. Here it goes... Teachers making 30,000 to $60,000 the union is considering a $1,000 pay raise. A. Will the standard deviation change and the mean and the median stay the
asked on May 18, 2015 
math
What is the shape of a linear function on a coordinate plane. choices are: a. circle b. ellipse c. vertical d. horizontal I chose "D"
asked on May 15, 2015 
Finite Math
The purchases made by customers at a convenience store are normally distributed, with a mean of $5.50 and a standard deviation of $3.50. What is the probability that a randomly chosen customer makes a purchase between $2.00 and $9.00?
asked on March 9, 2014 
art
What happens when negative and positive shapes begin to fuse together?
asked on November 26, 2013 
Physics
what is calculus
asked on October 24, 2010 
math
The volume of a cone is three hundred cubic kilometers. If the radius of the base is 9 kilometers, what is the height of the cone? Use three point one four for pi. Show your work and round to the nearest tenth.
asked on August 27, 2010 
Science
what are the 6 rules to draw atoms?
asked on September 30, 2009 
ALGEBRA 1
2/3+y=3/4 please show your work
asked on September 17, 2009 
Social Studies
What role did religious freedom play in the founding of Rhode Island and Pennslyvania?
asked on September 15, 2009 
Us History
why were europeans interested in asia?
asked on September 6, 2009 
math pre algebra
can you help me with this equation and may you please show your work? 3=3y
asked on May 25, 2009 
Technology
Is a cellphone an electrical appliance
asked on May 17, 2009 
Pre Algebra Math
How to write a rule for a linear function?
asked on April 30, 2009 
math pre algebra
what is the slope of y=5x6 and y=7/2x +5 ?
asked on April 29, 2009 
science
explain how trees affect the water cycles including deforesting
asked on April 28, 2009 
Social Studies
How might irrigation help a region's economic development?
asked on April 21, 2009 
social studies
Where is the eastern rift located? Where is the western rift located?
asked on April 14, 2009 
chemistry
Which of the following halides forms a solid when added to silver? (More than one answer may be selected) 1) Cl 2) Br 3) F 4) I
asked on March 24, 2008 
Algebra1A
(3,4);2x+1
asked on March 20, 2008 
Where are you Jasmine20, I answered your Homework
Please check your homework answer At: Name:Tanisha Subject: To:Jasmine20 I posted the answer for GURU DEFINITION. HOPE IT HELPS!!! I think jasmine20 is not on jiskha.
asked on December 29, 2006 
inclusive language
Can you please verify if I have done this correctly 1.The directors and their wives met the stockholders for a night on the town. my answer The directors and their spouses met the stockholders for a night on the town. You are correct.
asked on November 22, 2006

maths
A. Four factories are to be randomly selected from a list of eleven factories for a full health and safety inspection i. Calculate the number of ways that four factories can be selected. ii. Two of the factories have the same owner. Calculate the
posted on April 3, 2019 
Math
Suppose a man is 35 years old and would like to retire at age 60. Furthermore, he would like to have a retirement fund from which he can draw income of $125,000 per year— forever! How can he do it? Assume a constant APR of 8%.
posted on January 3, 2019 
physics
Very funny question!!!!!!!!!!!!!!!!!!!!
posted on June 21, 2018 
Science
Explain briefly how it is 43.84%
posted on October 28, 2017 
Math
Rebate 12000 Discount 2.4
posted on November 2, 2016 
Math
Cost of 1m shirt material=Rs50 Cost of 1m trouser material=Rs90 Let Has an buys shirt material =3x Hasan buys trouser material =2x Cost of shirt material cloth=Rs50Ã—3x=150x Cost of trouser material cloth =Rs90 Ã—2x=150x S.P. of shirt material
posted on September 16, 2016 
math
The answer is 30
posted on April 5, 2016 
Math
So. The answer is seven
posted on October 26, 2015 
math
I don not now how to do this
posted on October 26, 2015 
Math Help!!!
I chose A...i guessed. Its really hard
posted on May 19, 2015 
math
4 + 6 + 2(7) = I put 2+14 = 16
posted on May 15, 2015 
math
4 + 6 + 2(7) = I put 2+14 = 16
posted on May 15, 2015 
wlac
. $13,027.57
posted on September 7, 2014 
sentence skills
but
posted on August 11, 2011 
English
how does the The character in “My Mother” feel?
posted on June 2, 2011 
Geometry
a right triangle has legs of 24 units and 18 units. the lenght of the hypotenuse is?
posted on April 26, 2010 
Introduction Enngineering
i need bad help
posted on November 3, 2009 
Algebra 1
nika did you just copy the answer? thnx Ms. Sue
posted on September 17, 2009 
Language Arts
thnx!
posted on September 17, 2009