If the density of an unknown gas z is 4.50 g/l at stp what is the molar mass of gas z

A student is conducting a lab that requires 2 M HCl. In the chemical closet, there is 150 mL of 8 M HCl. How much water must be added to stock solution to get the desired molarity for the lab? A) 150 mL B) 450 mL C) 600 mL D) 1200 mL

Which could make up a solution? Check all that apply. A. A gas in a liquid B. Two gases C. Two solids D. A solid in a liquid

Difference between qualitative and quantitative observations?

Sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 567 g of NaOH (s) per liter of solution. Calculate the molarity of this saturated NaOH (aq) solution

What element contains 15 neutrons and 13 protons?

An atom of oxygen (atomic number 8) with an atomic mass of 16 would have how many neutrons?

Chlorophyll reflects which of these colors? a. red b. blue c. green d. yellow

Extracting oil from shale deposits a has been initiated on a large scale in the United States and will soon surpass Canada's production. b involves removing and refining waxy hydrocarbons called kerogen.

Which shows the levels of organization within an ecosystem from largest to smallest?

the physical properties of 10 grams of iron are the same as the ___ properties of 20 grams of iron a) reactive b) physical c) chemical