Monday

December 22, 2014

December 22, 2014

Number of results: 54,611

**INTRO TO PHYSICS**

Each of the following objects has a radius of 0.174 m and a mass of 2.16 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 37.3 rad/s. Find the magnitude of the angular momentum of each object. >Hoop of thin cylindrical ...
*October 31, 2012 by Sandy*

**chemistry**

The density of a 60% (m/m) ethanol solution 0.8937g/ml , calculate the molarity of the solution , step by step . Molar mass of ethanol = 46.07
*July 29, 2013 by kaksha*

**Chemistry**

I know how to find a and b on this problem but how do I find c? Really would appreciate the help, thanks! The formula of a compound of iron and sulfur was determined using the method of mass measurements. A sample of iron was weighed into a crucible and covered with finely ...
*February 21, 2010 by Jenny*

**physics**

One mole of titanium (6 1023 atoms) has a mass of 48 grams, and its density is 4.54 grams per cubic centimeter, so the center-to-center distance between atoms is 2.60 10-10 m. You have a long thin bar of titanium, 2.4 m long, with a square cross section, 0.11 cm on a side. You...
*June 26, 2014 by hannah*

**CHEM-HELP!!!!**

help? how do i calculate the heat of formation of a solid? i only know how to find the heat of formation of a liquid. here's what i have so far. delta t= 16.8 degrees c mass= 33.136 g cp = 4.184 j/g degrees c m cp delta t = -2329J (process is exothermic) what do i do now?
*October 24, 2007 by Jake*

**Chemistry**

I have a solution made up of 100 ml of distilled water and 2.0g of NaOH. I need to determine the total volumeof the solution in order to the calculate the mass of the reaction mixture. How do I do this? We are to assume the density of the solution is the same as pure water, 1....
*April 28, 2010 by Jim*

**chem**

As little as 1.oomg of Arsenic in 1-L of water can kill you. Calculate the following. Assume the density of the solution is 1.00g/cc. a.) How many moles of arsenic in 1 mg? b.) What is the mass percent of the solution? c.) What is the concentration in ppm and ppb? d.) What is ...
*December 8, 2012 by Tricia*

**physics**

The Moon can be considered to be a sphere with uniform density with mass MM and radius RM. At the (exact) center of the Moon, the gravitational force on a mass m due to the mass of the Moon is? I know the answer is zero but want to know why using gauss' law
*July 9, 2012 by lanre*

**Last Question Plz helppp:((im soo sleepy!!:(**

1)The reaction between solid sodium and iron(III) oxide, Fe2O3(s), is one in a series of reactions that occurs when an automobile air bag inflates. 6Na(s) + Fe2O3(s) -> 3Na2o(s) + 2Fe(s) If 100.0 g of iron(III) oxide are used in this reaction, what mass of solid iron will ...
*December 19, 2012 by Nikki*

**chemistry**

I need help with Part 2 Part 1. Record the following for each of the three experiments: (a) Mass of the empty calorimeter (g): 11.600 g (b) Initial temperature in the calorimeter (C): 21.00 (c) Maximum temperature in the calorimeter from the reaction (C): 29.27, 34.78, 40.29 (...
*May 7, 2010 by Amanda*

**science**

I see others have asked the same question but I do not understand the answers given. Question is to do with zinc solid and dilute sulphuric acid. What substance is left? I see by other posts that Bob Pursley answered this question. I haven't seen his answer but here is a hint...
*October 15, 2006 by teddy*

**algebra 2**

need help with The Chin's family room measures 24 ft by 30 ft. they are covering a floor with square tiles that measure 1 foot on a side and cost $0.73 how much will they spend on tile?
*April 30, 2013 by bernie*

**chemistry**

A 10.0 mL sample of 3.00 M KOH(aq) is transferred to a 250.0 ml volumetric flask and diluted to the mark. It was found that 38.5 ml of this diluted solution was needed to react the stoichimetric point in a titration of 10.0 mL of a phosphoric acid, H3PO4, solution. The ...
*June 20, 2009 by dan*

**physics**

Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.18 kg, the heavier box has a mass of 7.51 kg. (a) Find the contact force between these boxes when a horizontal force of 3.9 N is applied to the light box.
*September 26, 2011 by jeff*

**Chemistry**

Calculate the freezing point depression and osmotic pressure at 25 degrees C of an aqueous solution of 1.0 g/L of a protein (mol wt= 90,000) if the density of the solution is 1.0 g/mL. I know how to calculate freezing point depression and osmotic pressure, but I'm having ...
*March 24, 2007 by Jessica*

**Math**

The tree faces of a rectangular solid have areas 6,10, and 15. If the dimensions of the rectangular solid are all integers, what is the volume of the solid?
*August 13, 2013 by Anonymous*

**physicss please help**

Calculate the terminal velocity for a baseball. A baseball's diameter is approximately d = 0.073 m, and its mass is m = 0.146 kg. Express your answer in meters per second and miles per hour. (Assume a drag coefficient of 1 and air density of 1.3 kg/m3.) __ m/s __ mph
*February 14, 2009 by kj*

**chemistry**

Calculate the volume of fuel needed for a flight if the jet fuel has a density of 0.803kg/L.First use dimensional analysis to convert liter to grams.Then substract to find how many kilograms need to be added.then convert this mass into liters
*September 9, 2014 by treasa*

**Chemistry**

Describe how to prepare 5.00 liters of a 5.00 % (w/w) NaCl solution, which has a density of 1.06 g/mL, from pure solid sodium chloride. I have no idea how to find the starting measurements please help!
*February 6, 2011 by Anon*

**algebra**

the perimeter of a triangle is 205. one side is 10 longer than the shortest side. the third side is 5 less than twice the shortest side.how long is each side
*February 28, 2011 by tana*

**Physics**

A 6-g ice cube at −8°C is dropped into 70 g of water at 31°C. (a) After enough time has passed to allow the ice cube and water to come into equilibrium, what is the temperature of the water? (b) If a second ice cube is added, what will the temperature be?
*July 20, 2012 by Vladimir*

**algebra**

The ratio of the measures of three sides of a triangle are 1/2:1/3:1/5, and its perimeter is 6.2 centimeters. find the measure of each side of the triangle
*January 23, 2009 by chargersmath*

**5th grade**

the lengths of two sides of a triangle are 15in.each.the third side measures 10 in.what type of triangle is this
*December 2, 2010 by Anonymous*

**Math**

Use differential, (i.e. linear approximation), to approximate cube root of 64.1 as follows: Let f(x) = cube root of x. The linear approximation to f(x) at x = 64 can be written in the form y = mx+b. Compute m and b and find cube root of 64.2 via linear approximation
*December 19, 2014 by Anonymous*

**chemistry**

a room is 18ft long, 15ft wide and from floor to ceiling is 8ft6inches. what is the rooms volume in cubic meters? i have 6.498716 is this correct? what is the mass of air in the room in kilograms assuming the density of the air is 1.2g/l and the room is empty of furniture. i ...
*October 3, 2011 by cheryl*

**physics**

1) Two boxes are placed are placed side by side on a frictionless surface so that they touch each other. Box A has a mass of 4 kg. Box B has a mass of 12 kg. A constant force of 24 N is applied to box A. What force does box A exert on box B?
*November 10, 2009 by pat*

**8th grade**

Please help me how you get the answer. PLEASE I NEED HELP. A triangle sail has a perimeter of 25 m. Side a is 2 m shorter than twice side b, and side c is 3 m longer than side b. Find the length of each side. Thank you ver much for helping me
*October 27, 2010 by Glenda*

**Physics**

A cable passes over a pulley. Because of friction, the tension in the cable is not eh same on opposite side of the pulley. The force in one side is 110 N, and the force on the other side is 100 N. Assume that the pulley is a uniform disk of mass 2.1kg and radius 0.21. ...
*October 15, 2010 by Rod*

**Chemistry**

An element has ccp packing with a face-centered cubic unit cell. Its density is 8.92 g/cm3 and the unit cell volume is 4.72 x 10-26 L. Calculate the molar mass (g/mol) of the element to three significant figures.
*May 16, 2009 by Kristina*

**Chemistry**

An element has ccp packing with a face-centered cubic unit cell. Its density is 8.92 g/cm3 and the unit cell volume is 4.72 x 10-26 L. Calculate the molar mass (g/mol) of the element to three significant figures.
*May 16, 2009 by Kristina*

**chemistry**

An element has ccp packing with a face-centered cubic unit cell. Its density is 1770 kg/m3 and the unit cell volume is 1.50 x 10-28 m3. Calculate the molar mass (g/mol) of the element to three significant figures.
*January 20, 2012 by Crystal*

**G.N.M.P.S**

A solid weighs 1000g in air , 75g in water, and 70g in oil. Calculates the relative density of oil ?
*March 8, 2014 by shakshi*

**physics**

The density of liquid carbon dioxide is about 0.8 g/cm^3. What volume fraction inside the fire extinguisher (when it is full) is occupied by liquid CO2? The density of CO2 gas is negligible compared to the density of liquid CO2. Volume of fire extinguisher is 7.1*10^-3m^3; ...
*December 24, 2013 by Alice*

**Chemistry**

An ice cube at 0 degrees Celsius was dropped into 30.0 g of water in a cup at 45.0 degrees Celsius. At the instant that all of the ice was melted, the temperature of the water i the cup was 19.5 degrees Celsius. What was the mass of the ice cube?
*April 21, 2010 by Scoob*

**Chemistry**

An ice cube at 0 degrees Celsius was dropped into 30.0g of water in a cup at 45 degrees Celsius. At the instant that all of the ice was melted, the temperature of the water in the cup was 19.5 degrees Celsius. What was the mass of the ice cube?
*April 23, 2010 by Help1001*

**Calculus III**

Find the moment of inertia about a diameter of s spherical shell of uniform density, D, bounded by two concentric spheres of radii a and b, where a<b. Express your answer in terms of a, b and the mass of the spherical shell. So far I have found my equation for row (p), and ...
*August 4, 2014 by E*

**chemistry**

What mass of solid sodium acetate, NaCH3COO, must be added to 2.50 L of an aqueous solution of 0.55 M acetic acid, CH3COOH, in order to make a buffer solution whose pH is 4.50 ? Assume that adding the solid does not change the volume of the solution. Use the simultaneous ...
*December 6, 2014 by airman*

**Science**

what happens when we apply force below the centre of mass of a cube ? Will it tip?
*October 1, 2012 by suman*

**chemistry**

What is the mass of 1120cm cube of hydrogen gas at 750mmHg and 40 degree celsius
*October 4, 2012 by Femi*

**Chem-Lab-HELP!!**

Heating 1.124g of an unknown NaHCO3-NaCl mixture resulted ina mass loss of 0.270g. 1) Calculate the mass of NaHCO3 present in the original mixture. 2) Calculate the mass percent of NaHCO3 in the uknown mixture
*February 17, 2010 by Macey*

**Math**

Nathan is designing a box to keep his pet newt in. To make the box, he’s going to start with a solid rectangle and cut squares with sides x cm in length from each corner, as shown in the picture below. The dimensions of the of the solid rectangle are 51 cm by 45 cm. The volume...
*October 30, 2014 by Matt*

**chemistry**

ohh im sorry i also have another problem i don't understand. "A rectangular solid measures 1.0 m by 5.6 cm by 2.1 dm. Express its volume in cubic meters, liters, cubic inches, and cubic feet." i don't even know what dm means ! Someoneee please help me!
*July 21, 2008 by Jecce*

**chemistry**

A student measures the mass of a book as 12,321g. What is the book's mass in kg?
*August 23, 2007 by Rachael*

**chem HELP PLEASE its physics side of chem **

given E, = l^2 h^2 / 2 m r^2 calculate energies for an electron localised to a circle of radius 2 x 10^-9 m for l = 0,1,2, draw pictures of three levels and calculate the relative populations of these levels at 300K i did the first bit but came out with, 0, 6.0249 x 10-6 J mol...
*October 27, 2009 by poppy*

**physicss**

A cube with sides each 3cm long has 8 charges of Q = 25nC at each corner. What is the electric potential \Delta V at the center of the cube with respect to infinity, which is defined to have V=0 V?
*October 17, 2012 by Anthony*

**math**

a storage crate has the dimensions : 12ft * 6ft *5ft. how many cube-shaped boxes measuring 8 inches in length could be stacked completely within the cube??
*April 10, 2013 by tina*

**math**

a storage crate has the dimensions : 12ft * 6ft *5ft. how many cube-shaped boxes measuring 8 inches in length could be stacked completely within the cube??
*April 10, 2013 by kyle*

**math**

a storage crate has the dimensions : 12ft * 6ft *5ft. how many cube-shaped boxes measuring 8 inches in length could be stacked completely within the cube??
*April 10, 2013 by julia *

**chemistry**

Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemtp at solution volume of oxygen= .209476*50L=10.5L How do i go from volume of ...
*November 8, 2008 by jason*

**geometry**

The rectangle ABCD is rotated about the side AB. Find the volume of the solid defined by this rotation. AB = DC = 4cm AD = CB = 2cm
*January 9, 2011 by peter*

**Chemisry**

what mass of protons would be required to just neutralize the charge of 1.0g of electrons? how do I answer this? You know the mass of an electron. Calculate how many are in 1 gram. You will need the same number of protons. Knowing the mass of a proton calculate the number ...
*February 8, 2007 by Chris*

**Chemistry - please this is urgent**

To a calorimeter containing 41.80g of water at 29.95oC, 11.7999 of a salt was added with stirring. As the salt dissolved, the temperature rapidly changed to 37.85oC before slowly returning to room temperature. 1. Calculate the Heat of Solution. Given that the Heat of Formation...
*March 14, 2008 by girl who needs help in chemistry right now*

**density**

Suppose two worlds, each having mass M and radius R, coalesce into a single world. Due to gravitational contraction, the combined world has a radius of only 3/4R. What is the average density of the combined world as a multiple of p0, the average density of the original two ...
*December 1, 2013 by Rebecca*

**10th grade**

The ratio of the measures of three sides of a triangle are 1/2:1/3:1/5, and its perimeter is 6.2 centimeters. find the measure of each side of the triangle
*January 22, 2009 by Edisooner*

**math**

One of the angles of a right triangle measures 30°, and the hypotenuse is 10 inches long. How long is the side opposite the 30° angle?
*September 5, 2010 by ben*

**chemistry**

A 4.14 m solution of the solute methylene chloride dissolved in the solvent ethanol is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 1487 g of methylene chloride density: CH2Cl2-1327(kg/m^3) C2H5OH-789.3(kg/m^3)
*January 28, 2010 by bubble*

**Chemistry Science**

calculate the mass of carbon dioxide that would be produced when one gas of tank of gasoline (use octane) is burned in the air. assume an 80 liter gas tank and 0.703 g/ml as the density of octane
*August 30, 2014 by Joan*

**AP Chemistry, Chem, science**

Can anyone please help me with this problem?? =/ The reaction between solid sodium and iron (III) oxide is one in a series of reactions that inflates an automobile airbag. If 100g of sodium and 100g of iron(III) oxide are used in this reaction, determine: a. the balanced ...
*September 14, 2012 by Layla*

**Math help please**

calculate missing dimension. square based pyramid has height 92cm and volume 5.4 m cube.
*September 30, 2010 by Annie*

**Geometry/Math**

Calculate the volume to the nearest tenth of a 6.3-m cube with a hole 2 m in diameter drilled through it. Use 3.14 for pi.
*May 21, 2012 by Lex*

**Physics - Oscillations**

An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. The period of oscillation she undergoes when set into motion is used to determine her mass. If her mass, together with the chair, is 172kg, and the time required for her to ...
*November 18, 2013 by Mikhail*

**Physics (please help!!!!)**

A man of mass 80 kg and density 970 kg/m3 stands in a shallow pool with 31% of the volume of his body below water. Calculate the normal force the bottom of the pool exerts on his feet. (Take the positive direction to be up. Indicate the direction with the sign of your answer.)
*April 16, 2011 by HELP!!!!*

**chemistry**

More dilute sodium hydroxide solutions are often prepared from a sastuated sodium hydroxide soltuion thats is 52.0% by mass and has a density of 1.48 g/mL. Calculate the volume, in liters, of this solution needed to prepare 35.0 L if 0.125 M sodium hydroxide?
*March 30, 2011 by conlan*

**chemistry**

a solid substance has a density of 4.36 g/ml. what is the volume of 30 g of this substance?
*December 12, 2011 by jessica lou*

**Physics - KE/Inertia**

The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of three particles ...
*March 26, 2007 by COFFEE*

**physics**

A person weights 685 N in air but only 497 N when standing in water up to the hips. Find (a) the volume of each of the person’s legs and (b) the mass of each leg, assuming they have a density that is 1.05 times the density of water.
*March 25, 2013 by Jess*

**Math **

Determine the number of triangles that could be drawn with the given measure. Then, find the measures of the other angles and the other side in each possible triangle. Round side lengths to the nearest tenth of a unit and angle measure to the nearest tenth of a degree, where ...
*June 10, 2014 by Han*

**science**

Erin must perform a science experiment. She needs to dissolve 10 g of salt in 250 ml of water. She measures the water incorrectly and dissolves the 10 g of salt in 350 ml of water. Now she has no more salt. Explain what Erin can do to make the solution accurate.
*April 29, 2008 by astrid*

**geometry**

An isosceles triangle has a base of 9.8 units long. If the congruent side lengths have measures to the first decimal place, what is the shortest possible length of the sides.
*October 23, 2011 by Billy*

**math**

An isosceles triangle has a base 9.6 units long. If the congruent side lengths have measures to the first decimal place, what is the shortest possible length of the sides?
*July 1, 2014 by sara*

**chemistry**

Calculate the energy that must be removed to convert substance X from a gas at 115°C to a solid -50.7°C. Assume X has a molar mass of 75.0 g/mol. Specific heat capacities ΔHvap 20. kJ/mol C(s) 3.0 J/g · °C ΔHfus 5.0 kJ/mol C(l) 2.5 J/g · °C bp 75°C C(g) 1.0 J/g · °C ...
*April 19, 2010 by Trish*

**chemistry**

Calculate the energy that must be removed to convert substance X from a gas at 115°C to a solid -50.7°C. Assume X has a molar mass of 75.0 g/mol. Specific heat capacities ΔHvap 20. kJ/mol C(s) 3.0 J/g · °C ΔHfus 5.0 kJ/mol C(l) 2.5 J/g · °C bp 75°C C(g) 1.0 J/g · °C ...
*April 19, 2010 by Trish*

**Chemistry**

A piece of dry ice (solid carbon dioxide) with a mass of 25.5 g is allowed to sublime (convert from solid to gas) into a large balloon. Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature of 18 degrees Celsius...
*February 24, 2011 by Jake*

**Chemistry**

A piece of dry ice (solid carbon dioxide) with a mass of 25.5 g is allowed to sublime (convert from solid to gas) into a large balloon. Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature of 18 degrees Celsius...
*February 24, 2011 by Jake*

**Finding the Molecular Formula**

A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound? I had some ideas as to how to solve this ...
*December 8, 2012 by Amy*

**science**

If the volume of 26.100 grams of chloroform has a density of 1.49 g per ml, then what is the mass? I got 18.125. Is this correct? My other question is, if the mass of an aspirin is 250 mg, then what is the mass in kg? I got, .00025. Is this correct? Thanks, Elise
*February 19, 2009 by Elise*

**Science**

If the volume of 26.100 grams of chloroform has a density of 1.49 g per ml, then what is the mass? I got 18.125. Is this correct? My other question is, if the mass of an aspirin is 250 mg, then what is the mass in kg? I got, .00025. Is this correct? Thanks, Elise
*February 19, 2009 by Elise*

**chemistry**

You are analyzing a solid isolated from a reaction and find that its boiling point is over 1000 ∘C. You dissolve the compound in water solution and recrystallize it to produce some solid crystals that you use to determine that the compound is a crystalline solid. Which ...
*January 23, 2014 by Sheila*

**chemistry**

A 4.58 m solution of the solute methylene chloride dissolved in the solvent acetone is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 0.8848 kg of methylene chloride. density: CH2Cl2-1.327 (g/mL) (CH3)2CO-0.7899 (g/mL)
*January 28, 2010 by bubble*

**Solid Mensuration**

Find the lengths of the sides of the cylcic quadrilateral if one diagonal coincides with a diameter of a circle whose area is 36pi cm squared. The other diagonal measures 8 cm meets the fist diagonal at right angles.
*November 2, 2014 by Jayson*

**Physics Help..**

A small cube (m=0.290 kg) is at a height of 261 cm up a frictionless track which has a loop of radius, R = 28.71 cm at the bottom. The cube starts from rest and slides freely down the ramp and around the loop. Find the speed of the block when it is at the top of the loop. A ...
*February 12, 2014 by Ron*

**Physics please check**

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...
*April 9, 2007 by Mary*

**Chemistry**

Balance Eq.: Na2Co3+ CaCl2--> CaCo3+ 2NaCl. (CHALK) Calculate the mass of a dry precipitate. Calculate the mass of moles of the precipitate produced in the reaction.
*October 28, 2007 by Monte;*

**Math/Algabra**

The perimeter of a triangle is 102. side b is twice as long as side A. and side C is three less than side B.. how long is each side.
*February 13, 2011 by Randy*

**Science**

One edge of a copper cube is carefully measured and found to be 2.162 cm. An atom of copper is a sphere 0.2560 nanometers in diameter. Assuming that the volume of the cube contains nothing but copper atoms, how many copper atoms are contained in the cube? (the volume of a cube...
*September 24, 2011 by Laurel*

**Chemistry**

Can someone please help me out here? I've tried several times and i keep getting the wrong answer :( lol A small crucible is filled with 100.00 mL of n-hexadecane (MW (226.44 g/mol), density (0.7703 g/mL)) and 2.10 L of 7-octenyltrichlorosilane (MW (245.65 g/mol), density (1....
*January 21, 2013 by Tawnya*

**Geometry**

A study draws triangle with a perimeter 36cm.the study says that the longest side measures 18cm. how do you know that the student is incorrect?
*January 31, 2011 by JUn*

**wchs**

A checkerboard measures 144 square inches. What is the length of a small square on its side? Hint: It has 8 squares per edge.
*January 30, 2012 by Clara*

**Geometry/Math again!**

The base of a prism is a regular hexagon that measures 4 cm on each side. The prism has a height of 13 cm. What is its total surface area?
*May 21, 2012 by Lex*

**Math**

A room measures 450cm by 350cm. Find the side if the largest square tile that can be used to tile without cutting
*November 20, 2014 by Brianna*

**math**

If a cube is built from an one inch cubes and if each new cube has an edge N times as long as the previous model what would be true of consecutive surface areas
*March 31, 2011 by Cheyenne*

**physics**

A record player is spinning at 32 rpm when the motor is switched off. After 6.8 seconds the angular speed has decreased to 20 rpm. Calculate the frictional torque if the record player can be treated as a solid wheel of mass 2.4 kg and radius 15 cm. A) 476.47059 Nm B) 0.00499 ...
*November 28, 2010 by emily *

**High school chem 1**

4NH3(g) + 5O2(g) -> 4NO(g) + 6H20(g) what mass of H2O can be produced from 350 liters of NH3?
*March 1, 2011 by tyler*

**Chemistry**

What is true for water? A) In a phase diagram the solid-liquid coexistance line has a negative slope. B) In a phase diagram the solid-liquid coexistance line has a positive slope. C) The solid is more dense than the liquid. D) The solid is less dense than the liquid. E) The ...
*December 9, 2012 by Anon*

**Chemistry**

If 0.790 mol of solid TiO2 and 8.53 g of solid C are reacted stoichiometrically according to the balanced equation, how many moles of solid TiO2 remain? 3TiO2(s) + 4C(s) + 6Cl2(g) → 3TiCl4(l) + 2CO2(g) + 2CO(g)
*February 10, 2009 by Anonymous*

**physics**

A solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle θ = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is μ = 0.64. What is the ...
*November 6, 2014 by stewart*

**science**

a u-tube is partially filled with water.oil which does not mix with water is next poured into one side until water rises by 2.5cm on the other side.if the density of oil be 0.8 ,the oil level will stand higher than the water level by how much?
*May 17, 2012 by abuobaida johar*

**physics**

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the ...
*September 6, 2010 by Jack*

**chemistry**

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the ...
*September 6, 2010 by Jack*

**TO MS SUE SCIENCE HELP**

These are my last 2 questions i need help on.... 1. to determine the density of an irregularly shaped object, a student immersed the object in 21.2 ml of water in a graduated cylinder, causing the level of the water to rise to 27.8 ml. If the object had a mass of 22.4 g, what ...
*December 14, 2012 by SPIKE*

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