Friday

February 12, 2016
Total # Posts: 78

**Chemistry**

If 34.3 mL of barium hydroxide are required to neutralize 15.9 mL of the acid, what is the molarity of the hydrochloric acid solution?
*November 28, 2015*

**Chemistry **

If 34.3 mL of barium hydroxide are required to neutralize 15.9 mL of the acid, what is the molarity of the hydrochloric acid solution?
*November 28, 2015*

**Math (PLEASE HELP!)**

1. Solve the system of equations by elimination.y=2x^2-2x-3 and y=-x^2-2x-3 2.The system of equations y=-5(x+4)^2-4 and y=8x^2+64x+124 has _____ solution(s). 3. Determine the value of k in y=kx^2-5x+2 that will result in the intersection of the line y=-3x+4 with the quadratic ...
*June 18, 2015*

**maths**

i am thinking of a number i multiply it by 8 and subtract 163 i would get the same answer if i multiply by 3 and subtract 13
*April 6, 2015*

**Chemistry**

Calculate the mass in grams of the undiluted bleach that was in the sample of bleach titrated. Given: Density of undiluted bleach unkown is 1.042 g/mL. 14.44 mL of .100 M Na2S2O3. .0537 grams of NaClO. Each sample should conain 1/5 of the original undiluted bleach. Since 5mL ...
*October 26, 2014*

**chemistry**

Consider the equation 2kclo3(s) -> 2kcl(s)-1302(g). 3.00-g sample kclo2 is decomposed and the oxygen at 24.0 and 0.982 its either, 911, 304, or 608
*June 10, 2014*

**science**

What the heck is wrong with you girls? If they were real famous people, wouldn't they be doing this on facebook or something? And this is a learning site, not a chat.
*May 14, 2014*

**chemistry**

Determine ΔSuniv for the following equation: Ca2+ (aq) + SO42- (aq) → CaSO4 (s)
*April 15, 2014*

**physics**

What linear speed must a 4.0×10−2kg hula hoop have if its total kinetic energy is to be 0.20J ? Assume the hoop rolls on the ground without slipping.
*October 29, 2013*

**COMMON CORE MATH**

SIMPLIFY THE EXPRESSION 12R + 5 + 3R - 5
*October 11, 2013*

**COMMON CORE MATH**

SIMPLIFY THIS EXPRESSION -6K + 7K
*October 11, 2013*

**MATH:( Base systems?!**

2. Determine the base- five representations for each of the given numbers. Remember that a numeral with no subscript is understood to be n base ten. a.47 b. 179 c. 354
*July 9, 2013*

**math**

Can someone help me with this question i've spent hours on it!!:( 6. Eight square tiles are laid out on a table so that they make a solid pattern. Each tile must touch at least one other tile along an entire edge. The squares all have sides of length 1. Here is an example...
*July 9, 2013*

**algebra**

t can not equal positive 6.
*January 30, 2013*

**Chemistry**

Determine the partial pressure of oxygen collected by water displacement if the water temperature is 20.0 ◦ C and the total pressure of the gases in the collection bottle is 760 torr. PH2O at 20.0 ◦ C is equal to 17.5 torr.
*January 28, 2013*

**Physics**

A compact 60-kg object is attached to one end of horizontal 40-kg uniform steel tube 2.4m long. What is the distance from the loaded end to the center of gravity of the object-tube system?
*December 7, 2012*

**Physics**

When a mass of 28 g is attached to a certain spring, it makes 17 complete vibrations in 3.0 s. What is the spring constant of the spring? Answer in units of N/m
*November 26, 2012*

**History**

character sketch of a fictional Puritan named Justice Johnson about the Puritans. how he dresses, how he lives, what he believes, how he spends his time--in short, describe him so that a stranger, who knows nothing about Puritanism, would recognize him
*November 16, 2012*

**Chemistry**

For the following reaction, 3.93 grams of carbon tetrachloride are mixed with excess methane (CH4). The reaction yields 4.10 grams of dichloromethane (CH2Cl2). methane (CH4) (g) + carbon tetrachloride (g) dichloromethane (CH2Cl2) (g) What is the theoretical yield of ...
*October 23, 2012*

**Chemistry**

What volume of a 0.332 M hydrobromic acid solution is required to neutralize 29.6 mL of a 0.155 M calcium hydroxide solution ?
*October 22, 2012*

**chemistry**

How many grams of solid potassium hydroxide are needed to exactly neutralize 10.8 mL of a 1.25 M hydrobromic acid solution
*October 22, 2012*

**Chemistry**

According to the following reaction, how many grams of nitrogen gas will be formed upon the complete reaction of 22.2 grams of hydrogen gas with excess nitrogen monoxide? nitrogen monoxide (g) + hydrogen (g) nitrogen (g) + water (l)
*October 16, 2012*

**Average Value - Calculus**

What is the average value of y for the part of the curve y = 4x − x^3 that is in the first quadrant?
*June 5, 2012*

**geometry**

what happens when you put 7 over x and 9 and 11????????:)
*February 8, 2012*

**Life Science 6thgrade**

Explain how you could determine whether the seeds in a packet of round pea seeds have the genotype Rr or RR, in which R represents round seeds and r represents wrinkled seeds?
*October 6, 2011*

**Life Science 6th grade**

Explain how you could determine whether the seeds in a packet of round pea seeds have the genotype Rr or RR, in which R represents round seeds and r represents wrinkled seeds?
*October 6, 2011*

**Chemistry**

The volume of a sample of oxygen is 300.0mL when the pressure is 1.00 atm and the temperature is 27.0 degrees C. At what temperature is the volume 1.00 L and the pressure 0.500 atm?
*May 31, 2011*

**Integrated Physics and Chemistry**

Which of the following forms of energy transfer can occur in a vacuum? A) conduction B) convection C) radiation D) all of the above Can I get some help on this one too, please?
*March 21, 2011*

**Integrated Physics and Chemistry**

Thanks to both of you (:
*March 21, 2011*

**Integrated Physics and Chemistry**

Okay. Thank you for the help (:
*March 21, 2011*

**Integrated Physics and Chemistry**

So the gold sample will experience a greater increase in temperature?
*March 21, 2011*

**Integrated Physics and Chemistry**

A 5.0-gram sample of gold and a 5.0-gram sample of iron both absorb exactly 25 calories of energy. The specific heat of gold is 0.03 cal/gÂ°C. The specific heat of iron is 0.11 cal/gÂ°C. Which of the following statements is true? A) The gold sample will ...
*March 21, 2011*

**Geography/History**

Okay. Thank you. And I know, I just don't think I've been keeping that in mind.
*March 9, 2011*

**Geography/History**

I'm doing an alternate test on Sub-Saharan Africa, and Africa. I cant find all the answers in the book, and i can't find a good website. Can someone help me find a good website for Sub-Saharan Africa?
*March 9, 2011*

**Geography/History**

Okay. thank you (:
*March 9, 2011*

**Geography/History**

Which of the countries listed below receives the most rainfall? A) Somalia B) Namibia C) Democratic Republic of Congo D) Central African Republic I cant find the answer to this anywhere, can someone help?
*March 9, 2011*

**Geography/History**

Oh okay. Thank you, Ms. Sue (:
*March 7, 2011*

**Geography/History**

uhm. No they don't have to be in order. I didn't know there was an order for them to go in
*March 7, 2011*

**Geography/History**

cost and raw water quality?
*March 7, 2011*

**Geography/History**

These factors hinder water quality improvement in Eastern Europe. 1) carbon credits 2) cost 3) outdated systems 4) raw water quality 5) unskilled employees Can someone help, please?
*March 7, 2011*

**IPC**

The specific heat capacity of aluminum is 0.22 cal/gÂ°C. How much energy needs to flow into 20.0 grams of aluminum to change its temperature by 15Â°C? How do i set this problem up to solve it?
*February 24, 2011*

**geometry**

how do you exolain logic with converse, inverse, and contrapositive.
*January 23, 2011*

**PHYSICS**

use the formula F=(G(m1)(m2))/r^2 G=universal gravitational constant= 6.67x10^-11 N m^2/kg^2 F=9.8 N (given) m1=1.0 kg (given) m2=mass of earth (variable) r=6.4x10^6 m (given) 9.8 N=((6.67x10^-11 N m^2/kg^2)(1.0 kg)(m2))/(6.4x10^6 m) x=6.02x10^24 kg
*December 8, 2010*

**chemistry**

a 30. L sample of gas exerts 200. mm Hg pressure at 10 degrees C. What volume does the gas have at 300. mm Hg and 25 degrees C?
*November 12, 2010*

**chemistry**

a 30. L sample of gas exerts 200. mm Hg pressure at 10 degrees C. What volume does the gas have at 300. mm Hg and 25 degrees C?
*November 11, 2010*

**IPC**

Element A and element B have bonded and formed compound AB. Which of the following statements is true? A) Compound AB has chemical and physical properties that are completely different from those of A and B. B) Compound AB has chemical and physical properties that are a blend ...
*November 4, 2010*

**IPC**

Oh okay. Thank you bunches! (:
*October 19, 2010*

**IPC**

What is the change of phase from a solid to a gas? I know, liquid to gas is evaporation. So what if it skips the liquid part? Help?
*October 19, 2010*

**english **

I'm pretty sure it would be A. Ha, I'm sitting behind you! :D
*October 19, 2010*

**History/Geography**

Wait... what do you mean Iran may have some "designs" on Jordan?
*October 15, 2010*

**History/Geography**

Thank you. Very much
*October 15, 2010*

**History/Geography**

ahh okay. I understand that. I like the way you put it better than the way my teacher did. Thank you.
*October 15, 2010*

**History/Geography**

Essay question: Choose an article reporting on a site where a conflict is likely to occur in the future. Summarize the article and discuss what role, if any, culture will play in the situation. How am I supposed to write about something that MIGHT happen in the future?! I'...
*October 15, 2010*

**THE PARTS OF SPEECH**

In the following sentence, identify the part of speech of the italicized word. Thousands of years ago, fish were caught in nets and traps.
*October 10, 2010*

**11th grade**

1,750 meters, since you're hearing the echo, and the ehco is twice the distance. So, you'd take 350 * 10 / 2 or just 350 * 5.
*September 28, 2010*

**Algerba 2**

Find H(-2)if H(x)=xto the third + 1
*September 21, 2010*

**geometry**

The area of the larger of two similar polygons is 729 square centimeters. If the scale factor of their perimeters is 2:3 what is the area of the smaller polygon?
*August 5, 2010*

**math**

4x^2+4x=3 solve by completing the square
*December 4, 2009*

**math**

2x^2+x-28=0 Solve by completing the square
*December 3, 2009*

**English**

can you give 5 points of society's role in music? painting?
*October 21, 2009*

**math**

17000 times a day, 1062.5 times an hour, 17.7 times a minute
*October 12, 2008*

**Social Studies**

Through which four South American countries does the 20 degrees South line of latitude pass
*September 23, 2008*

**ecology**

What four things vary the size of biological populations?
*September 22, 2008*

**social studies**

the name for topographical landforms that include mountains,hills, plateaus,etc is called?
*August 31, 2008*

**social studies**

the applacian mountains run from what to maine
*August 31, 2008*

**social studies**

the usa is made up of how many geographical regions?
*August 31, 2008*

**social studies**

people visit america to see its what?
*August 31, 2008*

**social studies**

thank you so much
*August 31, 2008*

**social studies**

what is the area stretching from new mexico to washington?
*August 31, 2008*

**Calculus**

Y=-13+18
*November 18, 2007*

**American republic**

What was the main difference between hessian soldiers and patriots?
*September 24, 2007*

**Algebra 2**

What is -5 square roots of 1?? thank you!! :) -1 sqrt (1) is 1. -5*1 = -5
*May 2, 2007*

**Earth Science**

A region of ocean water having the same temperature and salinity throughout is what??
*January 31, 2007*

**Science**

Chemistry: What is the general formula for a chemical reaction? reactants >> products
*November 5, 2006*

**help**

The CN Tower is 553m high. A person in a boat on Lake Ontario, at a point B due south of the tower, observes the top (T) of the tower at an angle of elevation of 8 degrees. At the same time, another person, at a point C on a bearing {S 85 degrees E } from the towerobserves an ...
*September 26, 2006*

**MATH!!!!**

The CN Tower is 553m high. A person in a boat on Lake Ontario, at a point B due south of the tower, observes the top (T) of the tower at an angle of elevation of 8 degrees. At the same time, another person, at a point C on a bearing {S 85 degrees E } from the towerobserves an ...
*September 26, 2006*

**Discrete..HELP!!!**

how do you solve this..I have idea even where to begin. If |x| = 11 and |y| = 23 and | x - y| = 30, find |x + y| We're asked: If |x| = 11 and |y| = 23 and | x - y| = 30, find |x + y| From this, |x| = 11, we know x=11 or -11 From this, |y| = 23 we know y=23 or -23 However, ...
*September 25, 2006*

**math**

i dont get problems like y=-2x. and y=3x-1 what is 15.02499 rounded to the nearest tenth what is 15.02499 rounded to the nearest tenth Oh geez, it's been a whole summer since I tried this. But if I'm not mistaken isn't it 15.0 ? Please correct me anyone if I am ...
*August 30, 2006*

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