Which of the following instruments is used to measure air pressure?
a. thermometer
b. barometer
c. hygrometer
d. anemometer

Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

How many grams of phosphorus are contained in 5.09 moles of phosphorus?