11/14/20

Complete and balance the molecular equation for the reaction of aqueous iron(III) nitrate, Fe(NO3)3 , and aqueous lithium hydroxide, LiOH. Include physical states.
Complete and balance the molecular equation for the reaction of aqueous iron(III) nitrate, , and aqueous lithium hydroxide,  Include physical states.molecular equation: Fe(NO3)3(aq)+LiOH(aq)⟶Enter... more
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11/14/20

chemistry question

An aqueous magnesium chloride solution is made by dissolving 5.78 moles of MgCl2 in sufficient water so that the final volume of the solution is 2.30 L . Calculate the molarity of the MgCl2 ... more
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11/14/20

A 3.0 L cylinder is heated from an initial temperature of 273 K at a pressure of 105 kPa
A 3.0 L cylinder is heated from an initial temperature of 273 K at a pressure of 105 kPa to a final temperature of  Assuming the amount of gas and the volume remain the same, what is the pressure... more
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11/13/20

finding mass when reaction has stopped

A 21.5 g sample of nickel was treated with excess silver nitrate solution to produce silver metal and nickel(II) nitrate. The reaction was stopped before all the nickel reacted, and 36.5 g of solid... more
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11/10/20

17.85 g of Mg undergoes the following reaction, what is the %s yield if 6.76 g of magnesium nitride is produced? 3 Mg(s)+N2(g)—->Mg 3 N 2 (s)
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11/10/20

42.7 mL of aqueous 0.255 M Pb(NO3)
42.7 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 21.7 of mL of 0..415 M NaCl. The equation for the precipitate reaction is Pb(NO3)2 (aq) + 2NaCl(aq)—->PbCl 2 (s)+2 NaNO 3 (aq) The concentration... more
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11/10/20

Enthalpy of formation
A scientist measures the standard enthalpy change for the following reaction to be -220.4 kJ :2H2O2(l)2H2O(l) + O2(g)Based on this value and the standard enthalpies of formation for the other... more
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11/06/20

I need help with the questions
1.) Which gas—hydrogen (H2) or oxygen (O2)—diffuses faster and at what relative rate? Both gases have the same temperature and pressure. (Round the relative rate to the nearest whole number.)2.) A... more
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11/06/20

This is a Chemistry problem I cannot figure out
A researcher is studying the effects of bleach on blue food dye, C37H34N2O9S3Na2 (792.86 g/mol). (a) Water is added to 0.200 g of the dye until the volume is 500. mL. What is the molarity of the... more
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11/06/20

I need someone to help me on this question
I've gotten some answers but I have no idea how I got them.  A chemist prepares a chemical reaction between aluminum nitrate and sodium hydroxide. The chemist  uses 100.0 mL of each solution in the... more
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10/01/20

Is the sample at constant mass? (chemical calculation)
A student working on this lab found the mass of their sample after the first heating to be 30.6057 g. The student heated the sample again for 5 minutes, cooled it, and then found the mass of the... more
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09/28/20

What mass of octane is consumed by the reaction of 4.0 of oxygen gas?
A major component of gasoline is octane C8H18 When octane is burned in air, it chemically reacts with oxygen gas O2 to produce carbon dioxide CO2 and water H2O.What mass of octane is consumed by... more
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09/28/20

Dimensional Analysis

The average distance from the sun to Earth is 150,000,000 km. If the sun burned out (or blew up), how long would it take the light from this event to reach Earth (in MINUTES)? Use the speed of... more
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12/16/19

Science Homework
I have a question what creates energy cellular respiration or Photosynthesis?
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12/16/19

How to balance Aluminum + Iron (II) Oxide
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12/15/19

Arrange the compounds in order of increasing boiling point temperature: O2, NO, N2
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12/15/19

if 8.0g of h2 reacts and 72 g of h2o is produced, how much o2 is consumed in the reaction
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12/09/19

Le Châtelier’s Principle
The density of graphite is 2.26 g/cm3 and that of diamond is 3.51 g/cm3. If the pressure increases, what does Le Châtelier’s Principle suggest will happen if the pressure is high enough?
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12/08/19

If 740 J of heat is added to 39 mL of Carbon tetrachloride initially at 80.0 C, what is its final temperature, in celsius?
Hfus=2.52 kJ/mol Hvap=32.54 kJ/mol m.p.=-22.29C b.p.=76.72C csolid=44.22 J/molC cliquid=131.3 J/molC cgas=82.65 J/molC dsolid=1.81 g/mL dliquid=1.59 g/mL
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