An unknown substance has a mass of 56.8 g and a volume of 23.4 ml. what is the density of this unknown substance?

the pressure on 2.50L of N20 changes from 105 kPa to 40.5 kPa. if the temperature does not change, what will the new volume be.

Which of the following most likely represents the specific gravity of granite? 2.7 3.0 3.3 5.5

Calculate the mass/volume percent of a NaCl solution in which 140 g of NaCl is dissolved in enough water to give a total volume of 1.59 L.

What is the molar mass of Al2 (SO3) 3

An iron isotope has an atomic mass of 55. how many neutrons does this iron isotope have?

How much water, in liters, must be added to 0.5 L of 6 M HCl to make it 2 M? a. 0.33 b. 0.5 c. 1 d. 1.5 e. 2

You start with 100 grams of zinc how many moles of hydrogen will be produced

What will an atom do if it has 1 to 3 valence electrons

What is milk best described as? solution, suspension, compound, or colloid?

In any chemical reaction, the quantities that are conserved are ... A. mass and moles. B. the number of molecules and the volumes. C. the number of moles and the volumes. D. mass and number of atoms.