Potassium has a mass number of 40 and an atomic number of 19. how many protons does it have?

A blood pressure of 145 mm Hg is considered to be high and is generally a sign of hypertension. Determine what this pressure is in kilopascals.

At STP, solid carbon can exist as graphite or as diamond. These two forms of carbon have (1) the same properties and the same crystal structures (2) the same properties and different crystal structures (3) different properties and the same crystal

In the chemical equation Fes+2HCI-->FECl2+H2S, there is one FeS molecule. True or false?

3. What is the substance ozone?

Describe What is happening to particles of a material in heat energy is transferred to the material in the temperature increases

Rank the temperatures from the highest to the lowest. 133F 351K 25C 273K 146C 58F 95F

Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g.

Where the single machos?

A reaction will be spontaneous only at low temperatures if both ΔH and ΔS are negative. For a reaction in which ΔH = - 320.1 kJ/mol and ΔS = - 86.00 J/K · mol. Determine the temperature (in °C) below which the reaction is spontaneous.

Is it possible for a balloon with an initial internal pressure equal to 250.0 kPa to naturally expand to four times its initial volume when the temperature remains constant and the atmospheric pressure is 101.3 kPa?