State the number of 1 H NHR signals or this isomer of xylene and the ratio in which they appear

Which is true of chemicals? a. things containing chemicals always cost a lot of money. b. chemicals are never dangerous. c. chemicals are in many substances in a home. d. chemicals are rarely found on earth.

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen