Darryl
Most popular questions and responses by Darryl
chemistry
How much heat is gained in joules by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 12 C
asked on November 18, 2010 
math
if naomi wants to accumulate 1,000,000 by investing money every year into her savings account at 3% for 30 years until retirement,how much does she need to deposit each year
asked on June 12, 2010 
Chemistry
Calculate the weight of ethane, C2H6 (MWT = 30g/mole), required to produce a pressure of 1520 mm at 20 degrees C when contained in a 9.00 liter vessel. How many moles of ethane is it?
asked on December 14, 2010 
Chemistry
In the reaction: MnO2 + 4 HCl > MnCl2 + Cl2 + 2 H2O Calculate: The volume of Cl2 produced from the reaction of 10 grams of HCl with excess MnO2?
asked on December 13, 2010 
chemistry
Calculate the pH of a buffer system composed of 0.880 M C5H5N and 0.660 M C5H5NHNO3. The Kb for C5H5N is 1.70 x 10^9.
asked on March 18, 2014 
CHEM
25.0 CM3 OF 0.100M acetic acid is titrated with 0.900M of NaOH. Ka for acetic acid =1.85*10^5. calculate 1)the intial pH of the solution. 2) the pH of the mixture at 1cm3 before the equivalence point. 3) the pH of the mixture at the equivalence point 4)
asked on October 1, 2012 
Math
Sean walk 3/4 of a mile in 15 minutes. At that same pace, how far, in miles, can Sean walk in 1 hour and 20 minutes?
asked on November 26, 2016 
Math
Jada, Lin, and Elena are saving for a trip. Together they saved $120. Jada save$20 less than lin. Lin saved 3 time as much as elena.Write and expression to represent the total amount of money they saved.
asked on September 10, 2017 
Math
the points A,B,C,D,and E are evenly spaced, what is the point of A and C on the number line __(a)___(b)2.83_____c___d___(e)1.64
asked on January 4, 2017 
Math
an envelope contains 20 bills in denominations of $1,$5,$10, there are two times as many $5 bills as there are$10 bills. the total of the envelope is $54. how many of each bill do i have
asked on March 16, 2010 
Chemistry
Research the contributions from these two scientists and read about how Avogadro’s number got its name. Briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid
asked on January 19, 2018 
MathAlgebra
Solve: 3x2y=10 2x+3y=2 Graph: Substitution: Elimination: Show Your work! (I can'tfigure out how to graph it and when i used substitution and elimination it came out with two different anwsers. I need help! and i need to be able to show my work!)
asked on January 17, 2011 
Math
Jada, Lin, and Elena are saving for a trip. Together they saved $120. Jada save$20 less than lin. Lin saved 3 time as much as elena.
asked on September 10, 2017 
Math
darry and nay eat dinner at a restaurant with 6% sales tax. They leave an 18% tip on the pre tax amount of the bill. If they paid a total of 37.20, what was their pre tax bill?
asked on January 4, 2017 
Math
The temperature at 5 am was 28 degrees F. The temperature at 2pm was 17 degreesf. If the temperature changed at a constant rate from 5am to 2pm what was the temperature at 6am?
asked on January 4, 2017 
Math
Calvin height at the end of 2015 was 4 feet 2 inches. At the end of 2016, Calvin is now 4 feet 5 inches tall. By what percent did calvins height increase from 2015 to 2016?
asked on January 4, 2017 
Math
Jaine spent 2/5 of the money in his wallet on a sweat. After purchasing the sweater he had 25.32 leftover. What was the total amount he spent on the sweater?
asked on January 3, 2017 
Math
A group of students volunteers at the animal it helping feeds the dogs. Each day small dogs eat 1/2 cup less dog food than medium sized dogs and large dogs eat 3/4 cup more dog food than the medium sized dogs. The shelter currently has 22 small dogs, 14
asked on September 10, 2017 
Math
Diegos class planning a field tripfor 25 students.They will go to aquarioum and then to science museum. Each ticket for science cost $2 more than each ticket to aquarium. Lunch for each student is $5 additional. Write and expression for total cost of
asked on September 10, 2017 
mATH
Crystal buy headphones that are on sale with a 40% discount. If she paid $24 for the headphones with the discount, what is the full price of the headphones?
asked on January 4, 2017 
Math
Martin has a vegetable garen that is 8 feet long and 5 feet wide. Next years he want to increase both the length and width of the garden by 15%. What will the dimensions of the garden be next year? Length __________ feet Width_____________ feet
asked on January 4, 2017 
MATH
dANIEL HASS A SET OF RED, GREEN AND BLUE MARBLES tHE RED ONE MAKE UP 1/2 OF THE SET THE SET HAS 2 BLUE THE NOMBER OF GREEN IS TWICE THE NUMBER OF BLUE HOW MANY MARBLES ARE IN DANIELS SET/
asked on April 13, 2014 
4TH GRADE MATH
MS T BOUGHT CUPCAKES FOR HER 3RD GRADE CLASS. MS. CASA BOUGHT TWICE AS MANY CUPCAKES AS MS T, AND 4 TIMES AS MANY CUPCAKES AS MS. G. MS. G BOUGHT 241 CUP CAKES. A. HOW MANY CUPCAKES DID MS T BUY? B. MS.. B CAME LATE TO THE PARTY AND HALF OF THE CUPCAKES
asked on February 26, 2014 
4th garde math
Jenny has twice as many cookies as Penny. Winnie has four more cookies than Jenny. If they have 44 cookies altogether, how many cookie does Penny have? Write a number sentence
asked on February 19, 2014 
Algebra
Solve: 3x2y=10 2x+3y=2 Graph: Substitution: Elimination: Show Your work! (I can'tfigure out how to graph it and when i used substitution and elimination it came out with two different anwsers. I got (13/3.5,19/10.5) for substitution, and ((0.2,0.8) for
asked on January 17, 2011 
Math
an envelope contains 20 bills in denominations of $1,$5,$10, the total of the envelope is $54. how many of each bill do i have
asked on March 16, 2010 
math
how much will i earn in interest if I put $190,000 in a 1 year CD getting 3%
asked on October 1, 2018 
Math
2/3m6.5=0.7
asked on January 3, 2017 
Math IV
what is the margin of error for a simple random sample of 900 people with a standard deviation of 13.5 at 95% level of confidence How do you write this question in the right formula, please? I believe I can calculate the problem, I don't know how to write
asked on August 20, 2014 
MATH
Tome has twice as many toys as Luke, Together they hace 39 toys. How may marbles does Tom hae. This is what I have so far 39=L + T(2)
asked on April 13, 2014 
4TH GRADE MATH
Wayne has told 34 fewer jokes than Anthony. Together, they have told one another 88 jokes. How many jokes did Wayne tell? How many jokes did Anthony tell? Write a number sentence and slove
asked on February 19, 2014 
sports finance
Assume that you are an NBA team owner who wants to build an arena with a budget of $400 million. You will provide $200 million of your own funds, but must finance the remaining balance. Calculate: A bank is willing to lend you 60% of the remaining balance
asked on October 12, 2010 
science
what is the fizzy gas called when you mix carbenit with acid?
asked on September 8, 2009

algebra
A group of students volunteers at the animal it helping feeds the dogs. Each day small dogs eat 1/2 cup less dog food than medium sized dogs and large dogs eat 3/4 cup more dog food than the medium sized dogs. The shelter currently has 22 small dogs, 14
posted on September 9, 2017 
algebra
Diegos class planning a field tripfor 25 students.They will go to aquarioum and then to science museum. Each ticket for science cost $2 more than each ticket to aquarium. Lunch for each student is $5 additional. Write and expression for total cost of
posted on September 9, 2017 
Physics
Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled from 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes?
posted on February 25, 2017 
Socials
Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled from 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes?
posted on February 25, 2017 
math
Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled from 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes?
posted on February 25, 2017 
Help easy
Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled from 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes?
posted on February 25, 2017 
Math!!
What is the probability of selecting a purple marble and then a white marble? What is the probability of selecting two white marbles? Is there a greater chance of selecting two white marbles in a row or two purple marbles in a row? Show your work. What is
posted on February 25, 2017 
Algebra
What is the probability of selecting a purple marble and then a white marble? What is the probability of selecting two white marbles? Is there a greater chance of selecting two white marbles in a row or two purple marbles in a row? Show your work. What is
posted on February 25, 2017 
Math fractions word problems
What is the probability of selecting a purple marble and then a white marble? What is the probability of selecting two white marbles? Is there a greater chance of selecting two white marbles in a row or two purple marbles in a row? Show your work. What is
posted on February 25, 2017 
Grade 8 math
What is the probability of selecting a purple marble and then a white marble? What is the probability of selecting two white marbles? Is there a greater chance of selecting two white marbles in a row or two purple marbles in a row? Show your work. What is
posted on February 25, 2017 
Precalculus
Tammy mixes the letters S, C, H, O, O, and L thoroughly. Without looking, Allen draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that Allen will not select a consonant? Tammy mixes the letters S, C, H, O, O, and L
posted on February 25, 2017 
Algebra 1
Tammy mixes the letters S, C, H, O, O, and L thoroughly. Without looking, Allen draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that Allen will not select a consonant? Tammy mixes the letters S, C, H, O, O, and L
posted on February 25, 2017 
Math
Write a list of steps that are needed to find the measure of ∠B. Write a list of steps that are needed to find the measure of ∠B. Write a list of steps that are needed to find the measure of ∠B. Write a list of steps that are needed to find the
posted on February 25, 2017 
Math! Pls Help!
Write a list of steps that are needed to find the measure of ∠B. Write a list of steps that are needed to find the measure of ∠B. Write a list of steps that are needed to find the measure of ∠B. Write a list of steps that are needed to find the
posted on February 25, 2017 
MATH
I am very sorry, and I wasn't trying to be rude. Sorry and Thank you
posted on April 13, 2014 
4th garde math
THANK YOU
posted on February 19, 2014 
Math
$5.00 3.79 Cost of tennis balls  $2.21 answer $10.00  6.88  $3.12 Answer
posted on February 19, 2014 
Chemistry
Thank You...I got 22.5g and .75 moles...Is this correct???
posted on December 14, 2010 
sports finance
422 million
posted on October 26, 2010 
3rd grade math question
Hasan made a modelfor 437 using 4 hundreths,3 tens, and 7 ones. What are two other ways he could show 437 using baseten blocks?
posted on July 29, 2010