Sanaya
Most popular questions and responses by Sanaya
Probability #3
Please check my answers. Thank you! The game of American roulette involves spinning a wheel with 38 slots: 18 red, 18 black, and 2 green. A ball is spun onto the wheel and will eventually land in a slot, where each slot has an equal chance of capturing the
asked on January 28, 2016 
Math
Another card game. In a new card game, you start with a wellshuffed full deck and draw 3 cards without replacement. If you draw 3 hearts, you win $50. If you draw 3 black cards, you win $25. For any other draws, you win nothing. (a) Create a probability
asked on January 29, 2016 
Probability #2
Baggage fees. An airline charges the following baggage fees: $25 for the rst bag and $35 for the second. Suppose 54% of passengers have no checked luggage, 34% have one piece of checked luggage and 12% have two pieces. We suppose a negligible portion of
asked on January 28, 2016 
ChemistryDr.Bob
An unknown piece of metal weighing 100. g is heated to 90.0 degrees Celcius. It is dropped into 250 g of water at 20.0 degrees Celcius. When equilibrium is reached, the temperature of both the water and piece of metal is 29.0 degrees Celcius. Determine the
asked on January 9, 2016 
ChemistryDr.Bob, I need you!!!!
You can mix 100.mL of 1.0 M HCl with 100 mL of 1.0 NaOH, both at 25 degree Celcius. The temperature of your calorimeter rises by 5.98 degree C, and its heat capacity is 100 J/degre C. How much energy is released per mol of H2O formed? My answer: 6x10^6 J
asked on January 8, 2016 
Math
Baggage fees. An airline charges the following baggage fees: $25 for the rst bag and $35 for the second. Suppose 54% of passengers have no checked luggage, 34% have one piece of checked luggage and 12% have two pieces. We suppose a negligible portion of
asked on January 29, 2016 
Chemistry
I am stuck on b)... Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the
asked on January 25, 2016 
ChemistryDr.Bob
A solution is prepared by mixing 50.0mL of 0.001 M HCl and 10.0 mL of 0.200 M NaCl. What is the molarity of chloride ions in this solution? My work: (0.001 mol/L)((0.05 L)= 0.005 mol HCl (0.200 mol/L)(0.01 L)= 0.002 mol NaCl 0.005+0.002=0.007 mol of
asked on November 20, 2015 
math
A roll of fabric was 144 inches long. A customer bought 2 feet of the fabric. How many feet of fabric were remaining?
asked on November 10, 2011 
Chemistry Dr.Bob
Why is cisPCl3F2 polar and transPCl3F2 nonpolar?
asked on November 28, 2015 
math
A roll of fabric was 132 inches long. A customer bought 3 feet of the fabric. How many feet of fabric were remaining?
asked on November 14, 2011 
Statistics
Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81,82,83,83,88,89,94. When I used the TI84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3Q1=82.572.5=10 But.. When I created a stem and leaf plot I found that Q2=
asked on January 7, 2016 
Probabiliy
Another card game. In a new card game, you start with a wellshuffed full deck and draw 3 cards without replacement. If you draw 3 hearts, you win $50. If you draw 3 black cards, you win $25. For any other draws, you win nothing. (a) Create a probability
asked on January 28, 2016 
Probability #1
Please check my answers. Thank you! Another card game. In a new card game, you start with a wellshuffed full deck and draw 3 cards without replacement. If you draw 3 hearts, you win $50. If you draw 3 black cards, you win $25. For any other draws, you win
asked on January 28, 2016 
ChemistryDr.Bob
Since most chemical reactions are conducted in containers open to the armisphere, why is the energy transfer associated with a chemical reaction generally expressed as the change in enthalpy? Is it because the enthalpy of reaction measures the change in
asked on January 10, 2016 
ChemistryDr.Bob
You can mix 100.mL of 1.0 M HCl with 100 mL of 1.0 NaOH, both at 25 degree Celcius. The temperature of your calorimeter rises by 5.98 degree C, and its heat capacity is 100 J/degre C. How much energy is released per mol of H2O formed? My answer: 6x10^6 J
asked on January 8, 2016 
Chemistry
Please check. HCl: dipoledipole interaction HF: hydrogen bonding TiCl4: ionic bonding? CsCl:ionic bonding
asked on January 29, 2016 
Statistics
Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81,82,83,83,88,89,94. When I used the TI84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3Q1=82.572.5=10 But.... When I created a stem and leaf plot I found that
asked on January 7, 2016 
Chemistry
Calculate the average kinetic energy of 1 mol of hydrogen molecules and of 1 mol of sulfur hexafluoride molecules at 25 degrees Celsius.
asked on January 18, 2016 
ChemistryDr.Bob
You are at your cabin in the woods. Will you be able to take a hot bath tonight if only 0.1 lb of propane remains in the tank? Explain. My answer: No, I will not be able to take a hot bath. By making assumptions and approximations, I got... energy released
asked on January 11, 2016 
Chemistry
Name the compound or give molecular formula. 1. Pt(NO2)2 : ? Is it Platinum (II) Nitrite 2. Manganese (II) bromide pentahydrate:? Is it MnBr2 • 5H2O
asked on December 6, 2015 
Calculus
Compute the surface area of revolution about the xaxis over the interval. y = x^2, [0, 4] Is it (pi/12)(65^2  65)^(3/2)?
asked on December 7, 2015 
math
Jenelle has a blue jug and a red jug, both containing water. The blue jug has 4 gallons and 1 quart of water in it, and the red jug has 2 gallons and 2 quarts of water in it. How much water is in both jugs?
asked on November 16, 2011 
Chemistry
Combusting 44.8L of H2 with 22.4 L O2 (both at STP) results in the formation of 44.8 L of H2O if the reaction is maintained at the same conditions (STP) and goes to completion. Given the heat of formation of water (= 241.8 kK/mol) calculate a) the PV work
asked on January 26, 2016 
ChemistryDr. Bob
Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the surroundings),
asked on January 20, 2016 
Chemistry Dr.Bob
1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 12 psi (vs. 14.7 psi at sea level). Under those
asked on January 20, 2016 
Chemistry Dr.Bob!
1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 12 psi (vs. 14.7 psi at sea level). Under those
asked on January 20, 2016 
Chemistry
Calculate the frequency of light associated with the emission from n=5 to n=4 in the hydrogen atom. I got 7.41 x10^13 Hz, but the answer would make sense if it is positive... So does this mean that when the electrons jump from n=5 to n=4, energy is
asked on December 6, 2015 
Calculus
Evaluate using long division. The integral of x/6x5 dx How do I divide this?
asked on November 19, 2015 
Chemistry Dr. Bob
Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the surroundings),
asked on January 20, 2016 
Chemistry
Why is the pressure of a gas does not depend on the molar mass of the gas?
asked on January 18, 2016 
Chemistry
Can pi bonds be made from dorbitals?
asked on December 6, 2015 
math
Holly ordered 2 pounds and 9 ounces of roast beef and 3 pounds and 9 ounces of ham. How much meat did Holly order?
asked on November 14, 2011 
ChemistryDr.Bob
Why is gasoline (octane) better than diesal (cetane)?
asked on January 11, 2016 
Chemistry
Compute the surface area of revolution about the xaxis over the interval. y = x^2, [0, 4] Is it (pi/12)(65^2  65)^(3/2)?
asked on December 7, 2015 
ChemistryDr.Bob
What is the increasing dipole moment for CO,CS, and SiS? My answer: SiS
asked on December 7, 2015 
Calculus
How do I integrate sqrt of (1+e^(2x)) if doing usub.. u=sqrt of (1+e^(2x)) and ten using partial fraction...?
asked on December 6, 2015 
Chemistry
Can pi bonds be made from dorbitals?
asked on December 6, 2015 
Grammar
Is it correct to say.. "This chicken tastes fabulous." Is the word "fabulous" used correctly in this context?
asked on December 5, 2015 
Calculus
How do you integrate (xr)^2 (1/r) (e^(x/r)) from the interval negative infinity to positive infinity?
asked on November 27, 2015 
Calculus
Integrate e^(t/r) WITH RESPECT TO dt?
asked on November 23, 2015 
Calculus
How do you integrate e^(t/r) dt?
asked on November 22, 2015 
Calculus
How do you integrate e^(t/r)?
asked on November 22, 2015 
Calculus
Integrate x/(6x5) dx The answer is 1/6 x + 5/36 ln abs (36x30) + C... But I don't understand why it is 5/36 times ln.. I thought that when you factored out the 5 you would get 5 times ln abs (36x30)..
asked on November 21, 2015 
Calculus
Calculate integral [0, infinity) xe^(x) dx
asked on November 21, 2015 
Calculus
Integral sign 8x/(x1) dx Is it 8x+8ln abs (x1)+C ?
asked on November 19, 2015 
Calculus
Evaluate the integral. Problem#1 Integral sign 4dx/[(x+3)(x^2 +3x) Does it matter where A, B, and C is placed over. Is there a particular order? Is it ..... (A/x)+(B/(x+3))+(c/(x+3)^2=4 Or ... (A/x+3)+(B/x)+(C/(x+3)^2)=4 I am confused because I get
asked on November 19, 2015 
math
Each side of the shaded square is 1 unit. What is the length, width, and area of the figure?
asked on February 4, 2013 
math
The perimeter of a rectangle is 38 centimeters. The length is 7.5 centimeters. What is the width?
asked on February 4, 2013 
math
The area of a rectangle is 45 square inches. One dimension is 5 inches. What is the perimeter?
asked on February 4, 2013 
math
Holly ordered 3 pounds and 11 ounces of roast beef and 4 pounds and 10 ounces of ham. How much meat did Holly order?
asked on November 10, 2011 
math
Jennie and Millie are sister gorillas. Jennie is 57 kilograms and 663 grams,and Millie is 113 kilograms and 181 grams. How much do the sister gorillas weigh together?
asked on November 10, 2011 
math
Levi worked in his neighbor's yard for 7 hours trimming the trees. After trimming, he bagged up the trimmings in 38 minutes. How many minutes did he work in the yard altogether?
asked on November 10, 2011 
math
A sack of sand measures 21 kilograms and 714 grams,and a sack of yard clippings measures 7 kilograms and 192 grams. How much more does the sack of sand measure than the sack of yard clippings?
asked on November 10, 2011

Science
Car has more speed becoz it has less mass than truck
posted on December 14, 2018 
math
you are correct i just needed help in this problem .thank you .
posted on January 28, 2018 
math
sex
posted on February 25, 2017 
Chemistry
Oops.. The subject for this one is calculus, not chemistry
posted on December 7, 2015 
math
i don't know
posted on November 27, 2015 
finding perimeters
Find the area of each square given s = 3.5yd
posted on February 4, 2013 
math
The answer is 8 feet remaining. 113=8
posted on November 14, 2011 
math
6lbs,2oz
posted on November 14, 2011 
math
add the pounds then add the ounces
posted on November 10, 2011 
math
60*7=420 420+38=458
posted on November 10, 2011 
math
14, 522
posted on November 10, 2011 
math
10
posted on November 10, 2011