Which of the following is an example of a chemical change?

a. ice melting

c. pounding gold into a coin

b. milk souring

d. a puddle of water evaporating

Nina ran into a rough patch of pavement, but she thought she could ride right over it. Instead, the skateboard stopped suddenly and Nina ended up on the ground (see Figure above). Explain what happened.

What is the smallest part of an element?

What occurs at stage A

Calculate the solubility of o2 in water at a partial pressure of o2 of 120 torr at 25 ̊c. the henry's law constant for o2 at 25 ̊c is 1.3 x 10-3 mol/l atm. how do you expect the solubility to change if the temperature were decreased?

What ketones would be formed from the acid-catalyzed hydration of 3-heptyne?

Which subatomic particles differ in number for two isotopes of the same element, and which subatomic particles will stay consistent between two isotopes of the same element? Explain how you know.

What is the oxidation state of an individual phosphorus atom in PO33-?

What must be added to water in order to change state from liquid to a gas?

What's 124.683 as a 1 significant digit number

You found that your wet product contains 0.362 moles of ammonium magnesium phosphate hexahydrate. How many grams of phosphorus does your wet product contain