Which of these is a conversion from chemical energy to mechanical energy?

A. A dark light bulb starting to glow

B. A ball rolling down a hill

C. A person lifting a weight

D. A potato being heated in an oven

A gaseous mixture contains 410.0 torr h2 (g), 370.7 torr n2 (g), and 67.7 torr ar (g). calculate the mole fraction, χ, of each of these gases.

If you have 5.25 grams of methane (CH4), how many grams of CO2 will you produce?

Which is the most common nutrient deficiency in the world? a. iron b. zinc c. copper d. calcium

If the equilibrium partial pressure of br2 is 0.0159 atm and the equilibrium partial pressure of nobr is 0.0768 atm, calculate the partial pressure of no at equilibrium.

What is the role of electron transfer in chemical reactions

A change of temperature equal to one kelvin is equal to a change of temperature of how many degrees celsius?

A solution has [h3o+] = 4.2*10-5 m. use the ion product constant of water kw=[h3o+][oh-] to find the [oh-] of the solution.

A. A rapid cooking method that uses high heat from a source located above the food.

What is the number of copper atoms in 1naira coin which weighs 7.39g assuming the material of which the coil is made is 86% copper Na=n/n number of moles/n

Which of the following statements are consistent with Rutherford's nuclear theory as it was originally stated? (A) The volume of an atom is mostly empty space. (B) The nucleus of an atom is small compared to the size of the atom.