Other sets by this creator
Propane, , is a hydrocarbon that is commonly used as a fuel. (a) Write a balanced equation for the complete combustion of propane gas. (b) Calculate the volume of air at 25 and 1.00 atmosphere that is needed to completely combust 25.0 grams of propane. Assume that air is 21.0 percent (c) The heat of combustion of propane is −2,219.2 kJ/mol. Calculate the heat of formation, of propane given that of =−285.8 kJ/mol and of = −393.5 kJ/mol. (d) Assuming that all of the heat released in burning 25.0 grams of propane is transferred to 4.00 kilograms of water, calculate the increase in temperature of the water.
A 60-kg housepainter stands on a 15-kg aluminum platform. The platform is attached to a rope that passes through an overhead pulley, which allows the painter to raise herself and the platform (Figure 4-57).
With what force must she pull down on the rope to accelerate herself and the platform upward at a rate of ?
Write a program that asks for the number of calories and fat grams in a food. The program should display the percentage of calories that come from fat. If the calories from fat are less than 30 percent of the total calories of the food, it should also display a message indicating the food is low in fat.
One gram of fat has 9 calories, so
Calories from fat = fat grams * 9
The percentage of calories from fat can be calculated as
Calories from fat / total calories
Input Validation: The program should make sure that the number of calories is greater than 0, the number of fat grams is 0 or more, and the number of calories from fat is not greater than the total number of calories.