Chapter 1, Problem 1.38E

What is the ratio of corstarch to water?

Length:3.55 cmWidth:2.55 cmMass:0.338 g   Volume of aluminum foil (cm3)

ITEMS USED FOR EXPERIMENT: •Ring stand •Hot plate •125 mL Erlenmeyer flask•400 mL beaker•10 mL graduated cylinder •Aluminum foil•Rubberband•Paper Clip•Thermometer•Vial containing unknown liquid You know have the following data: Mass of flask + foil + rubberband: 78.637 gMass of flask + foil and rubberband+ unknown condensed liquid: 78.847 gTemperature of water bath: 100C = 373 KPressure of gas in our system: 29.02 inHg = 0.9699 atmVolume of gas in our system: 141 mL = 0.141 L 1. During the experiment, you collect the following data: Mass of flask: 80.001 g Mass of flask + unknown condensed liquid: 80.452 g Temperature of water bath: 100 °C Pressure of gas in our system: 0.998 atm Volume of gas in our system: 265 mL Which of the following number(s) need a conversion before they can be used? (Check all that apply) [ ] Group of answer choices [ ] Volume of gas in our system [ ] Mass of flask [ ] Temperature of water bath [ ] Pressure of gas in our system [ ] Mass of flask +…

K; = 2.30 х 10 26

35. An effervescent tablet has the follow- ing formula: Acetaminophen Calcium Carbonate 325 mg 280 mg 900 mg Citric Acid Potassium Bicarbonate 300 mg Sodium Bicarbonate 465 mg (a) Calculate the total weight, in grams, of the ingredients in each tablet. (b) How many tablets could be made with a supply of 5 kg of acetamin- ophen? hle

1) A student measures 7.45 cm³ of chloroform using a glass syringe. Given that the density of chloroform is 1.48 g/mL, and the molar mass is 119.38 g/mol, how many moles of chloroform did the student measure?

Two students were tasked to weigh 100 mg of sodium chloride (NaCI). Student A pressed the tare button after weighing the weighing paper and obtained the following data. What is the mass (g) of NaCl from Student A? Mass of weighing paper (g) 0.0011 Mass of weighing paper + NaCl (g) 0.1050 Mass of the NaCI (g) Your answer While Student B did not press the tare button after weighing the weighing paper and obtained the following data. What is the mass (g) of NaCl from Student B? * Mass of weighing paper (g) 0.0011 Mass of weighing paper + NaCI (g) 0.1010 Mass of the NaCI (g) Your answer

4. Gasoline can be reasonably approximated as C9H20 with a density of 0.718 g/mL. Diesel can be reasonable approximated as C14H30 with a density of 0.763 g/mL. (Both gasoline and diesel are complicated mixtures. These formulas are something like weighted averages of the formulas of the different components, where the weighting is based on various quantifiable behaviors. That is, using these artificial formulas for gasoline and diesel allows one to calculate average properties that match what petroleum engineers might measure.) The enthalpy change from burning one mole of gasoline is -6160 kJ. The enthalpy change from burning one mole of diesel is -7940 kJ. Determine which fuel generates the biggest enthalpy change per gram burned, and which generates the biggest enthalpy change per mL burned.

The recommended daily allowance of thiamine is 1.4mg per day. A patient is consuming 0.80mg. What percentage of recommended daily allowance is the patient consuming?