The solvent acetone was poured into a glass container, and the combined mass of the container plus acetone was found to be 409.7 g. the mass of the empty container was 260.16 g, and the volume of acetone was 189 cm3. (to keep track of significant figures during each calculation, underline the last significant figure in each number in the calculation.)

(a) find the mass of acetone in the container by subtracting 260.16 g from 409.7 g, and report the result with the appropriate number of significant figures.

(b) calculate the density of acetone by dividing the mass obtained from part (a) by the volume 189 cm3, and report the result with the appropriate number of significant figures.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.