Part A: How many moles of O2 are needed to burn 1.65 mol of C8H18? Express the amount in moles to three significant digits.   Part B: How many grams of O2 are needed to burn 14.0 g of C8H18?    Express the mass in grams to three significant digits.   Part C: Octane has a density of 0.692 g/mL at 20∘C. How many grams of O2 are required to burn 14.0 gal of C8H18? Express the mass in grams to three significant digits.

A 43.9 g spoon made of pure silver (c = 0.235 J/g C) at 20.1 celcius is used to stir an 8 oz. (240 g) cup of coffee at 9.12 celcius. what is the final temperature of the coffee? Assume that the coffee is an insulated container and the spoon absorbs all of the heat from the coffee, and that the coffee has the same specific heat as water.

Ery 1 3 M (M) 2req The production capacity for acrylonitrile (C3H3N) in the United States is over 2 billion pounds per year. Acrylonitrile, the building block for polyacrylonitrile fibers and a variety of plastics, is produced from gaseous propylene, ammonia, and oxygen: 2C3H6(g) + 2NH3(g) + 30₂(g) → 2C3H3N(g) + 6H₂O(g) Assuming 100% yield, determine the mass of acrylonitrile which can be produced from the mixture below: Mass 7.28x102 g 5.00 x 102 g 1.00 x 103 g In progress Reactant oxygen propylene ammonia oxygen What mass of water is formed from your mixture? mass of water formed = g Calculate the mass (in grams) of each reactant after the reaction is complete: Submit g = mass of acrylonitrile produced Reactant Mass remaining propylene ammonia Show Hints ס ס ס g g Cengage Learning Cengage Technical Support Previous Next Save and Exit

Some commercial drain cleaners use a mixture of sodium hydroxide and aluminum powder. When the solid mixture is poured into the drain and dissolves, a reaction ensues that produces hydrogen gas: 2N2OH(aq) + 2Al(s) + 6H2O() – 2NAAI(OH)4(aq) + 3H2(g) Determine the temperature (in °C) of hydrogen gas produced when 31.58 g of aluminum reacts with excess sodium hydroxide and water if the pressure is 103.10 kPa and the volume is 36.23 L. Provide your answer with TWO decimals. Your Answer: Answer units

What is the kinetic energy (in Joules) of a chlorine molecule moving at 167 m/sec?

Calculate the energy of combustion per gram of Olive Oil (kJ/g) if 29.9 mL of water is placed in the test tube and the temperature changes from 22.9 °C to 44.6 °C. The initial mass of the spirit burner is 204.60 g and the final mass is 204.51g. State your answer with correct significant digits. Notes: Include a negative sign if the reaction is exothermic Do not include units in your answer.

Give the correct answer for the attached question

DATA : Mass of Magnesium (g) 0.0525 g Volume of hydrogen gas (mL) 50.0 mL Temperature of hydrogen gas (°C) 25.0°C Atmospheric Pressure (mmHg) 762 mm Hg Vapor pressure of water (mmHg) Partial pressure of hydrogen (mmHg) DATA ANALYSIS

A sample of gas is kept at 5 atmospheres, 25∘C, and takes up 3 L. If the gas is cooled, the volume changes to 1.5 L and the pressure changes to 4 atmospheres, what is the final temperature in degrees Celsius? Show all your work.