11/07/21

A balloon is floating around outside your window. The temperature outside is -19 ∘C , and the air pressure is 0.800 atm . it has 3.00 mol of gas. Whats the volume
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11/07/21

A sample of gas in a balloon has an initial temperature of 11 ∘C and a volume of 1400 L . If the temperature changes to 70 ∘C , whats the volume of V2 gas?
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11/07/21

A 300. L kiln is used for vitrifying ceramics. It is currently operating at 1405 ∘C , and the pressure is 1.050 atm . How many moles of air molecules are within the confines of the kiln?

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11/06/21

A known volume of ideal gas is contained in a cylinder fitted with a piston and held at constant pressure. If the temperature changes from 25oC to 100 oC, by what factor does the volume change?
A. does the volume decrease or increase ? B. By a factor of ?
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11/06/21

when you have 3.33 moles of (NH4)2Cr2O7, how many grams of N2 will be produced?
(NH4)2Cr2O7 --> N2 + Cr2O3 + 4H2O
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11/06/21

electron group geometry and molecular geometry

Determine the electron group geometry and molecular geometry SiO2 BCl3 NO2- TeBr4 PCl3 H2Se XeCl4 BrF5 BrCl3
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11/06/21

Chemistry help please

Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equationMnO2(s)+4HCl(aq)⟶MnCl2(aq)+2H2O(l)+Cl2(g) How... more
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11/06/21

Would my answers be correct?
Build a voltaic cell with one beaker containing a solution of nickel (II) nitrate - Ni(NO3)2 - with a nickel electrode, and a second beaker containing a solution of zinc chloride - ZnCl2 - with a... more
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11/06/21

Specific Heat Capacity Show work Please!

When 5800 joules of energy are applied to a 15.2-kg piece of lead metal, how much does the temperature change by?[2.98 degrees] <===Answer
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11/06/21

Specific Heat Capacity Show work Please!
How much energy (in kJ) is lost by a 348-kg iron statue that goes from a temperature of 299 Kto a temperature of 280 K?[-2975 kJ] <===Answer
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11/06/21

How many grams of NaCl would be needed to precipitate the Ag⁺ ions from 2.350 × 10² mL of a 0.0115 M AgNO₃ solution? The molar mass of NaCl is 58.44 g/mol.
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11/06/21

How many grams of Copper (II) phthalocyanine would be produced by the complete cyclotetramerization of 4.910 moles of phthalonitrile in the presence of excess copper (II) chloride?
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11/06/21

How many grams of Cacl2 would be needed to precipitate the Ag+ ions from 31.50 mL of a 0.0150 M AgNO3 solution? The molar mass of Cacl2 is 110.98 g/mol.
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11/06/21

C₈H₁₀(l) + O₂(g) + NH₃(g) → C₈H₄N₂(s) + H₂O(l). How many grams of water would be produced by the complete ammoxidation of 22.0 moles of o-xylene?
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11/06/21

Specific Heat Capacity Show work Please!

A silver ring has a mass of 138.45 g. How many joules of heat are required to increase the temperature from 11.8 ∞C to 162.5 ∞C?[5007 J]<==== Answer
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11/05/21

3. A metal with a specific heat of 0.78 J/g o C requires 45 J of heat to raise the temperature by 2 o C. What is the mass of the metal?
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11/05/21

hw help CH4 + 2O2 ------> CO2 + 2H2O Calculate the molecules of O2 needed to produce 3.65 x 1024 molecules of CO2?
CH4 + 2O2 ------> CO2 + 2H2OCalculate the molecules of O2 needed to produce 3.65 x 1024 molecules of CO2?
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11/05/21

Chemistry 103 Help
A 3.45 g sample of an unknown gas at 45 ∘C and 1.05 atm is stored in a 1.45 L flask.What is the density of the gas?What is the molar mass of the gas?molar mass:
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11/05/21

lewis structure
Draw (on paper) a Lewis diagram for CH3CH2OH.Use your diagram to answer the following questions.The number of C-H bonds =The number of O-H bonds is The number of C-C single bonds = The number of... more
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11/05/21

Specific Heat Capacity Show work Please!
When 895-J of heat is applied to a sample of iron metal the temperature increases by 55.0 ∞C.Determine the mass of the metal sample to the nearest tenth of a gram. [36.2g] <==== Answer
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11/05/21

Specific Heat Capacity Show work Please!
A water heater warms 35-L (35 kg) of water from a temperature of 22.7 ∞C to a temperature of83.7∞C. Determine the amount of energy (in kilojoules) required.[8933 kJ] <=== Answer
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11/05/21

From the following formula of hydrophilic ointment solve for the quantities of each ingredient needed to prepare 5 lb (Avoir) of the ointment. Note: 1 lb = 454 g (avoir)
Methylparaben 0.25 gPropylparaben 0.15 gSodium lauryl sulfate 10 gPropylene glycol 120 gStearyl alcohol 250 gWhite Petrolatum 250 gPurified Water, add 1000 ga) Use Ratio & Proportion for... more
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11/05/21

MnO2(s)+4HCl(aq)⟶MnCl2(aq)+2H2O(l)+Cl2(g) How much MnO2(s) should be added to excess HCl(aq) to obtain 195 mL Cl2(g) at 25 °C and 765 Torr ?
I am confused on how to get the mass of MnO2
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11/04/21

If you react 50g of HCl with unlimited magnesium hydroxide, how many grams of magnesium chloride are produced?

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11/04/21

General Chemistry HW
Write the net ionic equation.HBr(aq)+KOH(aq)>KBr(aq)+H2O(l)
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