What is the new water level in the cylinder?
A graduated cylinder contains 110. mL of water. A 10.0 g piece of iron (density = 7.86 g/cm3) and a 18.9 g piece of lead (density = 11.3 g/cm3) are added. What is the new water level in the cylinder?
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What mass of silver chloride can be prepared by the reaction of 130.0 mL of 0.15 M silver nitrate with 190.0 mL of 0.30 M calcium chloride?
A gas made up of homonuclear diatomic molecules escapes through a pinhole .533 times as fast as Ne gas. Write the chemical formula of the gas.
Change in heat content We write H = Hfinal - Hinitial or for chemical reactions H = Hproducts - Hreactants Given this equation, What sign is H for exothermic reactions? What sign is H for endothermic reactions?
Starting with 50.0 g of CaCO3(s) and 100 mL of 1 M HF, how many moles of CO2 can be produced?
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq)? For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
What color is the universal indicator when a double replacement reaction occurs with HCl and NaOH. The HCl turns the indicator red and the NaOH turns the indicator purple.
Calculate the energy change for the reaction K(g) + I(g) → K+(g) + I- (g) given the following ionization energy (IE) and electron affinity (EA) values. IE K = 419 kJ/mol, IE I = 1010 kJ/mol; EA K = 48 kJ/mol. EA I= 295 kJ/mol
How many milliliters of a stock solution of 2.00M KNO3 would you need to prepare 100.0 mL of 0.150M KNO3?
If 10.4 mols of hydrogen, H3, and 9.1 mols of oxygen, O2, are placed together in a container and allowed to react according to the following equation, which one, if any, is in excess and by how much? Also, how many moles of water, H2O, would be pr
Carbon dioxide at 223°C and 45 atm flows into the reactor at a rate of 600. L/min. What mass of urea is produced per minute by this reaction assuming 100% yield? Find _____g/min
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What can transformative learning do for adult learners that other pedagogy styles and instructional designs cannot do? Explain.
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How do you think the United States could change the public education system to level playing field and produce better outcomes? How are public schools funded?
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Describe the following programs with regard to Food Assistance for Low-Income Individuals. a. Supplemental Nutrition Assistance
The Japanese invasion of Manchuria and Italy's occupation in Abyssinia (Ethiopia) were challenges to the restrictions established by the League of Nations.
Explain how you can improve your practice and achieve your professional goals by reading article about practice or attending trainings and continuing education.