Thursday
March 30, 2017

# Posts by ROSE

Total # Posts: 1,292

Science
Given the following balanced equation, determine the rate of reaction with respect to [O2]. 2 SO2(g) + O2(g) → 2 SO3(g)
February 5, 2015

Science
If the concentration of AgCl drops from 1.000 M to 0.655 M in the first 30.0 s of the reaction, what is the average rate of reaction over this time interval?
February 5, 2015

Translate verbal expression into Algebraic express
Five friends went to a baseball game. Three of the friends each bought a ticket for x dollars and a soda for \$6.00. The other two friends each bought only tickets. Write and simplify an expression that represents the amount of money spent. Answer: 3x + 3(6) + 2x 3x + 2x + 16 ...
February 4, 2015

health
Why is health care recession proof?
February 3, 2015

algebra
I meant to say at the end that if: x=5 and y=2 and you plug them into the 2 equations that answer are different. x+y=6 (5)+(2)=7 , not true x-y=4 (5)-(2)=3 Hope this helps
February 3, 2015

algebra
x+y=6 -(x-y=4) ________ 2y=2 - - <divide both sides by 2, to get y 2 2 ______ y=1 Set x+1=6 x=6-1=5 ____Need to check y=2 and x=5 if its true -------- 5+2=7 not 4 5-2=3 not 4 {No solution}
February 3, 2015

chemistry
Find the percentage composition of (NH4)3PO4 What i don't understand is if the mass of the element isnt given how would i calculate?
January 28, 2015

Math
Hi Robin Yep that is correct.
January 27, 2015

algebra
y=20x+12 if x=number of hours rented example I want to rent the sailboat for 3 hours. The life jacket is a fixed number and doesnt change, so we just tack that on the the end of the equation. Y= total amount spent y=20(3)+12 y=72 (you spent 72 dollars for 3 hours on the boat)
January 27, 2015

Algebra 2
Whar are you trying to solve: =log 0.1 1000
January 27, 2015

Physics
h=1/2gt -2m=1/2gt -4m=gt -4m=(-9.8m/s^2)t -4/(-9.8m/s^2)=t
January 27, 2015

Physics
A small rocket is fired in a test range. It rises high into the air and soon runs out of fuel. On the way down it passes near an observer (sitting in a 21.5-m-high tower) who sees the rocket traveling at a speed of 35 m/s and moving in a vertical plane at an angle of 56° ...
January 27, 2015

physics
January 26, 2015

physics
A 425 g model rocket is accelerated upward at 86 m/s2 by its engine. What is the value of the force exerted by the engine on the rocket?
January 26, 2015

i need one sigh of discrimination here's my work The most obvious form of discrimination is skin color. Crooks is segregated in view of his skin shade. “They play cards in there, but I can't play because I'm black. They say I stink.”(pg. 34) This quote ...
January 20, 2015

English (of mice and men) PLEAS
i need one sigh of discrimination here's my work The most obvious form of discrimination is skin color. Crooks is segregated in view of his skin shade. “They play cards in there, but I can't play because I'm black. They say I stink.”(pg. 34) This quote ...
January 20, 2015

chemistry
A 6.00 L balloon contains helium at SATP at ground level. What is the volume when it floats up to an altitude where the temperature is 10.0 degrees C and atmospheric pressure is 91.5 kPa
January 18, 2015

Chemistry
In an acid base titration 32.5 mL of sodium hydroxide, NaOH, were neutralized by 17.6 mL of 0.180 mol/L sulfuric acid, H2SO4. Calculate the concentration of the sodium hydroxide.
January 12, 2015

Chemistry
Write the total ionic and net ionic equations for each of the following reactions: A) hydrobromic acid with potassium hydroxide B) Nitric acid with barium hydroxide
January 11, 2015

chemistry
Classify each substance as either arrhenius acid or base: A) HF (aq) B) Ba(OH)2 (aq) C) H2SO4 (aq) D) NH4OH (aq) My work A) arrehenius acid B) arrhenius base C) arrhenius acid D) arrhenius base Am i right
January 10, 2015

mah
holly spend 7 and 3/5 hours in school each day. her lunch period is 1/2 hour long, and she spends a total of 7/10 hour switching rooms between classes.the rest of her day is spent in 6 classes that are all same length. how long is each class?
January 7, 2015

language arts
Thanks for the answers I got 100%!!
January 2, 2015

Physics
A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady rate.if the effort is equal to 60N,determine.(a)The distance moved by the effort.(b)The workdone by the effort in lifting the load.(c)The loss in ...
January 1, 2015

One of the reactions involved in the smelting of copper sulfide ores involves copper (I) oxide and copper (I) sulfide: 2Cu2O2 + Cu2S ---> 6Cu + SO2 Assuming that 35.00 g of copper (I) oxide is heated with 25.00 g of copper (I) sulfide A) determine which reagent is present ...
December 7, 2014

chemistry check if my answers are right. drbobzz
I also have another chemistry question that i am stuck on.
December 7, 2014

chemistry check if my answers are right. drbobzz
So A would be 147.5 and C) 33.22
December 7, 2014

chemistry check if my answers are right. drbobzz
A) mass of O2 = (48.0 C2H2/26.04 g/mol)(5O2/2C2H2)(16.00 g/mol) = 73.7 g of oxygen C) mass of H2O = (48.0 g C2H2/26.04 g/mol)(2H2O/2C2H2)(18.02 g/mol) = 14.8 g of water
December 7, 2014

chemistry check if my answers are right. drbobzz
Acetylene gas(c2h2) is used in welding. During one job a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene calculate the following. Equation 2C2H2 + 5O2 ---> 4CO2 + 2H2O A) the mass of oxygen used B) the mass of carbon ...
December 7, 2014

chemistry
Acettlene gas (C2H2) is used in welding. During one job, a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene, calculate the following: Balanced Equation a) the mass of oxygen used b) the mass if carbon dioxide produced c) the ...
December 6, 2014

Chemistry
CuSO4.xH2O Determine the percent by mass of water in your sample of hydrated copper (II) sulfate. Show your calculations clearly. My work. i got 10% is that correct
December 1, 2014

physics
The temperature of the air is 20.0 degrees Celsius when a tourist drops a coin into a wishing well. She hears the splash 5.30 s after drops the coin. If air resistance is ignored, how deep is the well?
November 29, 2014

Physics
so is the answer D correct?
November 28, 2014

Physics
Which wave of the following wavelengths could not make a standing wave in a 1.0 m string, with nodes at both ends? A. 2.0 m B. 1.0 m C. 0.75 m D. 0.50 m E. 0.25 m i think the answer is D
November 28, 2014

Physics
ok thank so much! it makes senses
November 28, 2014

Maths
Jake mixes pineapple, orange and lemonade in the ratio of 1:2:4. If he has 3 parts pineapple, how much orange and lemonade does he need?
November 25, 2014

biology
Are Lilac flowers vascular or non vascular
November 22, 2014

Biology
Is a Lilac Flower: a) Vascular or non-vascular b) Gymnosperm or angiosperm c) Monocot or a dicot My Work i know c) is dicot but i am not sure of the other two
November 20, 2014

Physics
A woman on a bicycle traveling at 10m/s on a horizontal road stops pedaling as she starts up a hill inclined at an angle of 10° to the horizontal. How far up the hill does she travel before coming to rest? I really don't understand this question. Please help!
November 19, 2014

Physics
A meteorite weighing 1860N strikes the earth with a velocity of 45.2m/s. What is its kinetic energy? Write in SN to one decimal place. When I plugged in (1/2)(1860N)(45.2m/s)^2, I got the answer 1.9e6, but it was incorrect. Please help. I'm really confused!
November 19, 2014

Two games went a total of32 mins one goes 12mins longer than the other .use letter to represent the unknown. Solve the problem
November 19, 2014

Physics
Calculate the power needed from the motor of an elevator for it to be able to lift a 1x10^4kg mass a distance of 20m in 5s. (Enter your answer in scientific notation utilizing "e" format and rounding the decimal value to one decimal place.) I used the equation p = w/...
November 19, 2014

arithmetic
How do I solve 15x=75?
November 16, 2014

arithmetic
How do I solve .15x=75
November 16, 2014

arithmetic
If you spent 85% of your money and have only \$75.00 left, how much money did you start with?
November 16, 2014

machnics
The equations of motion are derived from the indefinite integral of acceleration.verify
November 6, 2014

Astronomy
How much does the luminosity of a spherical source of blackbody radiation increase if you triple its size?
November 3, 2014

Astronomy
If some external force were able to compress the sun, how would the sun react and why?
November 3, 2014

chemistry
I don't understand
November 2, 2014

chemistry
Complete and balance the following reactions, where applicable. If no reaction occurs, write N.R. Li + H2O ----> KCI + F2 ---> Au + HNO3 ---> CI2 + NaF ----> Li + Fe(NO3)3 --->
November 2, 2014

Physics
Three children are fighting over a toy. One child pulls on the toy with a force of 100N at an angle of 37° north of east. The second child pulls on the toy with a force of 200N south. The third child pulls with a force of 250N at an angle of 20° south of west. Watching...
October 31, 2014

Physics
A satellite orbits a planet at 4000m/s, and the acceleration of gravity (centripetal acceleration) on the satellite is 0.58m/s2. What is the diameter of the orbit of the satellite? (Enter your answer in scientific notation utilizing "e" format and rounding the ...
October 31, 2014

Physics
A cord 0.65m long exerts a centripetal force of 23N on a whirling 2kg mass tied to the end of the cord. What is the velocity of the whirling mass? Round to nearest tenth. For this problem, I used to formula V = square root of f/rm. I did the square root of 23/0.65(2) = 8.4m/s^...
October 31, 2014

MATH ASAP
2.)D-about 20 3.) A- about 48 4.) A- about 8 5.) C- 3 modes What number is underlined on #1?
October 30, 2014

Biology
A couple has a child with an autosomal recessive form of glycogen storage disease, a deficiency of a lysosomal enzyme. An enlarged liver and heart and weak muscles cause the baby to die from heart and lung failure at 20 months. Now the woman is pregnant again. Her doctor ...
October 21, 2014

Algebra HELP!
The student bookstore had a textbook for sale at \$89.95. A student found the textbook on eBay for \$62.00. If the student bought the book on eBay, what percentage of the cost of the bookstore book did she save?
October 21, 2014

Solve for x in each of the following: a: 2/3x = 11/6 b: 3/4 / x = 1/3 c: 5/6 - 2/3x = 3/4 d: 2x/3 + 1/4 = x/6 - 1/2 Please help me and explain, I don't get fractions at all!
October 11, 2014

statistics
The physical plant at the main campus of a large state university receives daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 42 and a standard deviation of 10. Using the empirical rule (as ...
October 8, 2014

Chemistry
Naturally occurring copper is a mixture of two isotopes. One of these has 34 neutrons the other has 36. If the relative atomic mass of copper is 63.55 amu calculate the natural abundances (percentages ) of the two isotopes.
October 5, 2014

Algebra
Find the first five terms of the sequence whose nth term is given. a: (-2)n + 2n b: n squared(-1)n c: |10-n squared|
October 1, 2014

Microbiology
What is the preferred method of sterilization for heat-sensitive solution? In addition, note a heat-sensitive solution that can be sterilized using the method you noted. a. Preferred method: b. Example:
September 26, 2014

Microbiology
How would you disinfectant a plastic chair surface contaminated with blood in the hospital? (Please note in detail the steps required for personal protection, initial clean-up, follow-up disinfection, and the disposal methods of contaminated items) a. Personal protection ...
September 26, 2014

Microbiology
Explain why regular hand soaps are good de-germing agents but poor antimicrobial agents
September 26, 2014

Microbiology
If you are formulating a new chemical disinfectant for bacterial control in the home, note two factors that you would take into consideration when designing this disinfectant. a. b.
September 26, 2014

Microbiology
A patient with an active case of Mycobacterium tuberculosis (TB) was treated and released from the hospital. You are responsible to oversee the decontamination of the patient’s room. Explain why is it a concern if the beside roll-away table has dried-up sputum on it from ...
September 26, 2014

Microbiology
Name a pathogenic bacterium (provide genus and species names) and the disease caused in humans that is typically spread by healthcare professionals in a healthcare facility due to improper techniques. In your explanation, provide an example how this bacterium could be spread ...
September 26, 2014

Microbiology
How would you disinfectant a plastic chair surface contaminated with blood in the hospital? (Please note in detail the steps required for personal protection, initial clean-up, follow-up disinfection, and the disposal methods of contaminated items.) a. Personal protection ...
September 26, 2014

Microbiology
What methods would you use to sterilize and clean a lab coat contaminated with a broth culture of Vibrio cholerae so that the lab coat could be safely used again? a. Method of sterilization: b. Method of cleaning: c. Name which method would be implemented first:
September 26, 2014

Microbiology
Name a pathogenic endospore-forming bacterium (provide genus and species names) which can be associated with improperly canned beans. Note what method is used to process canned beans. If the canned beans are not properly processed and these pathogenic endospore-forming ...
September 26, 2014

Math
thxs got a A+ because of u :)
September 23, 2014

Science
An object has a volume of 22 liters and a mass of 35 kilograms what's the objects density?¿???????????????
September 23, 2014

Economic
The Admissions Director (AD) wants to determine the optimum number of students for each ECO561 class. You are provided with the following data: Tuition is \$1250 per student. Instructor Pay \$2500 Other incidental (variable) costs - \$1000.00 Variable cost increases by 10% per ...
September 23, 2014

Language Arts
sorry I meant what is a diminutive?
September 16, 2014

math
Simone rents a compact car that gets 31 miles per gallon. When she rents the car, the price of a gallon of gas is \$3.10. The cost C of the gas used to drive the car is a function of the number of miles x that the car is driven. The cost of renting the car is \$0.10 per mile ...
September 15, 2014

Average speed: Bill and Amy want to ride their bikes from their neighborhood to school which is 14.4 kilometres away. It takes Amy 40 mins to arrive at school. Bill arrives 20 mins after Amy. How much faster(in meters/second) is Amy's average speed for the entire trip?
September 2, 2014

english
d,c,d,b checked on my quiz..
August 15, 2014

physics
calculate the amount of heat energy required to melt a 1kg iron ingot initially at 20 ¡ãC? (heat of fusion for Fe is 33.0 J/g
August 4, 2014

chemistry
Describe how the structure of polyethylene impacts its function in terms of chemical bonding and intermolecular forces
July 5, 2014

English! - Help!
8. is b surprise endings and 9 is a the necklace
June 3, 2014

Spanish
Thanks soo much!!! btw i forgot to write my name but any ways thanks again^__^
May 21, 2014

Spanish
Thanks i really need this help.
May 21, 2014

Spanish
Spanish Help Me Plz!!^__^ _________ 1. La Marcha _________ 2. La Cruz de Guía _________ 3. La Bulla _________ 4. Los Nazarenos _________ 5. El Paso del Cristo _________ 6. Los Penitentes _________ 7. El Paso Palio a. crowds of people b. the members of the fraternity, ...
May 21, 2014

science
Thank you so much Jack! I got 100% If you feel nervous about his answer, don't . He's not lying~ Thnx Jack~ :)
May 15, 2014

English
C is incorrect
May 13, 2014

math
a plane leaves Vancouver headed for Toronto of a speed of 700 km/hr. Half an hour later a planes leaves toronto headed to vancouver travelling at a spped of 750 km/hr. the distance between vancouver and toronto is 3420 kn. How long after the plane leaves vancouver will it pass...
April 30, 2014

math
how much is 8 liters jug water he fills 9750 millimeters pitchers with water how much water is left?
April 23, 2014

geometry
3 times the complement of an angle is 30 more than the supplement of the original angle. What is the measure of the angle?
April 23, 2014

Physics
f a 40 kg weight and a 200 kg weight each dropped from 1 m above the trampoline, find the final position of each weight. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. I was able to get the answer to this, using mg(h+x) = 1/2kx^x...
April 18, 2014

English
Mrs. Sue is right, I just took the assesment and I got 100%.
April 15, 2014

English grammar
Who can give me a good explanation with examples for the following conjunction. a) while b) unless
April 11, 2014

math
if 10 of the 50 pieces if candy are green, then what percent of the pieces of candy are green?
March 25, 2014

math
Rachel , smith , john and Thomas brought in 300 pennies for the penny harvest . Smith brought in 2/6 of the pennies . Rachel brought 1/5 and Thomas brought 1/4 of the pennies. How many pennies did john bring in?
March 24, 2014

trigonometry
a clock has a dial face of 12 inches radius the minute hand is 9 inches while the hour hand is 6 inches the plane of rotation of the hour hand is 2 inches above the plane of rotation of the minute hand. Find the distance between the tips of the minute and hour hand at 5:40 am.
March 18, 2014

Math
March 16, 2014

math
please solve 100 divided by 5 to the 2nd power times 4 to the 3rd power.
March 16, 2014

math
Andrew wants supplement his pension with investment interest if he invests 28,000 at 6% interest how much would he have to invest a t 7% to achieve the goal of 3,000 per year in supplemental income.
March 2, 2014

help-3 questions
Thanks! This helps SO much!
January 22, 2014

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