A hot air balloon has an air vent that keeps the air pressure inside and outside the same.
Allen observes that a hot air balloon rises up when the gas molecules inside it are heated.
Which of the following laws is used to understand the behavior of the gas and why? (5
points)
The high temperature brings the gas molecules closer together according to Charles's law
because this law describes how a gas will behave at constant pressure.
The high temperature makes the gas molecules spread apart according to Charles's law because
this law describes how a gas will behave at constant pressure.
O The high temperature lowers volume according to Boyle's law because this law describes how a
gas will behave when the number of moles remains constant.
The high temperature raises volume according to Boyle's law because this law describes how a
gas will behave when the number of moles remains constant.

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates