Which of the following systems has potential energy only?

Select one:

a car screeching to a halt

an airplane flying above

a stone falling off a cliff

a bird sitting on a branch

A hydrate of CuSO4 has a mass of 12.98 g before heating. After heating, the mass of the anhydrous compound is found to be 9.70 g. Explain how you would determine the formula of the hydrate and then write out the full name of the hydrate.

17. kg into g convert following

Balance the equation. Al2S3 (s) + H2O (l) →2Al (OH) 3 (s) + 3H2S (g)

Why is the time needed to vaporize the sample of water significantly greater than the time needed to melt the sample?

What is the balanced chemical equation for the reaction used to calculate ΔH∘f of SrCO3 (s) ? If fractional coefficients are required, enter them as a fraction (i. e. 1/3).

What two quantities are conserved in every chemical reaction? a. moles and mass c. volume and mass b. mass and atoms d. moles and atoms?

What two chemical mechanisms change pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex? Group of answer choices a) Decarboxylation and condensation. b) Oxidation and decarboxylation. c) Condensation and dehydrogenation.

Which earth cycle does the suns energy drive

How many moles are in 10 grams of CaCl2?

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a subscript of 5 indicates five Cl atoms P5Cl because a subscript of 5 indicates five P atoms P5Cl3 because a subscript of