02/16/20

Chemistry 120 Question
SOLUTION X IS 10 PERCENT ALCOHOL BY VOLUME, AND SOLUTION Y IS 30 PERCENT ALCOHOL BYVOLUME. HOW MANY MILLILITERS OF SOLUTION Y MUST BE ADDED TO 200 MILLILITERS OF SOLUTION XTO CREATE A SOLUTION THAT... more
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02/15/20

At a certain temperature, Kp for the reaction
At a certain temperature, Kp for the reaction,Cl2(g) <=> 2 Cl(g) is 0.000883.Calculate the value of Kp for the reaction,Cl(g) <=> 1/2 Cl2(g)
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02/15/20

Calculate Kp for the following reaction
Calculate Kp for the following reaction: 3 O2(g) <=> 2 O3(g); Kc = 545 at 33 oC  Give your answer to 3 decimal places.
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02/15/20

Given the values of K shown below, determine the value of K for the reaction
Given the values of K shown below, determine the value of K for the reaction,Ca(s) + 1/2 O2(g) + CO2(g) <=> CaCO3(s)Ca(s) + 1/2 O2(g) <=> CaO(s)         K = 9,438 CaCO3(s) <=>... more
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02/15/20

In the laboratory you dissolve 24.7 g of chromium(II) sulfate in a volumetric flask and add water to a total volume of 375 mL.
What is the molarity of the solution? ______ M.What is the concentration of the chromium(II) cation? ______ M.What is the concentration of the sulfate anion? ______ M.
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02/15/20

Dimensional Analysis Problem Help
The average density of the earth is 5.52 g/cm3, what is its density in (a) kg/m3 and (b) lb/ft3?
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02/15/20

When a student added 13gm of zinc to 50cm3 of HCl acid . Calculate :1) The number of moles of zinc added. 2) The mass of ZnCl2 formed. 3) The volume of H2 gas produced

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02/14/20

determine the amount
Use balanced chemical equations to relate amounts of reactants and products.The unbalanced equation for the reaction between ammonia and oxygen gas is shown below.Balance the equation (enter the... more
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02/14/20

what amount of P4O10 was consumed? what mass of H3PO4 is produced?
Use reaction stoichiometry to calculate amounts of reactants and products.The substances perchloric acid (HClO4) and tetraphosphorus decaoxide react to form phosphoric acid and dichlorine... more
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02/13/20

Calculation of Freezing Point
Ethylene glycol (C2H6O2) is used as an antifreeze in cars. 400 g of ethylene glycol is added to 4.00 kg of water. Calculate how much the freezing point of water will be lowered. The freezing-point... more
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02/13/20

Dimensional Analysis Problem Help
Camels have been reported to drink as much as 22.5 gallons of water in 12 hours. How many liters can a camel drink in 30 days?
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02/13/20

A reaction requires 22.4 L of gas at STP. You have 25.0 L of gas at 101.5 kPa and 373 K. Which of the following statements is true? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.)
You will have enough gas You will have excess gas You do not have enough gas
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02/13/20

A student increases the temperature of a 200 cm balloon from 60°C to 180°C. What will the new volume of the balloon be? (Be careful with units.)
272 cm^3236 cm^3100 cm^3600 cm^3
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02/13/20

What does it mean if something is miscible?
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02/13/20

Identify what happens to the solubility of a solid when you raise the temperature and explain why.
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02/13/20

Identify if one mole of CaCl2 or one mole of NaCl will raise the boiling point of water higher. Explain.
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02/13/20

Name three colligative properties.
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02/13/20

Name three ways to increase the rate that something will dissolve in water.
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02/13/20

What is the difference between a solvent and a solute? Give examples of each.
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02/13/20

What is responsible for causing the surface tension in water?
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02/13/20

Calculate Delta H reaction

Calculate the standard enthalpy change, ΔH°rxn, in kJ for the following chemical equation, using only the thermochemical equations below:2SOCl2(l) + O2(g) →... more
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02/12/20

Determine heat released in kJ

2 HCl(aq) + 1 Ba(s) → 1 BaCl2(aq) + 1 H2(g) ΔH°rx = -538.88 kJ71.41 g of Ba(s) is added to 290 mL of 0.616 M of HCl(aq)·
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02/12/20

Calculate the percent water in iron (ii) sulfate heptahydrate

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02/12/20

Law of conservation

If 20 grams of magnesium reacts with 175 grams of chlorine to form magnesium chloride, and no magnesium is left after the reaction, but 23 grams of chlorine remained unreacted. How any grams of... more
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02/11/20

Chemical engineering project
What are some household items that can be used to create plastic polymers? I have this project for school that assigns me to create a polymer made from a chemical reaction but I'm stuck on ideas... more
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