Is dry ice subliming, endothermic or exothermic?

What is the molality of an aqueous kbr solution with a mole fraction of kbr, x, equal to 0.245?

A certain FM radio wave has a frequency of 1.31 x 108 Hz. Given that radio waves travel at 2.99 x 108 m/s, what is the wavelength of this FM radio wave? (Round your answer to three significant figures.)

How many liters of water can be boiled by burning 1 kg of propane? Round your answer to the nearest whole number.

A solution containing 1.15 mol benzene dissolved in carbon tetrachloride has a concentration of 0.86 m. How many kilograms of carbon tetrachloride must the solution contain?

List the properties of the metalloids in the P block.

Which of the following equilibria would be impacted by a change in pressure? Select the correct answer below: H2 (g) + I2 (g) →2HI (g) NO (g) + O3 (g) →NO2 (g) + O2 (g) 2SO3 (g) →2SO2 (g) + O2 (g) CO (g) + H2O (g) →CO2 (g) + H2

A common stain remover is sold in concentrated form as 3M sodium hypochlorite (NaOCl). You need to create 400 milliliters of a 0.5M solution of sodium hypochlorite to fill a spray bottle. What volume of 3M sodium hypochlorite is needed? 15.0 mL 66.

A chemical reaction that takes in heat is called: exothermic endothermic a phase change

Which of the following lines (of latitude or longitude) would represent by 180 longitude? South Pole Equator Prime meridian North Pole International date line

63Ni decays by a first-order process via the emission of a beta particle. The 63Ni isotope has a half-life of 100. years. How long will it take for 65% of the nickel to undergo decay?