If you need to measure the width of your MP3 player to make sure it will fit in the carrying case on sale at the mall, which of the following units of measurement should you use

Why is oil unable to dissolve well in water? Water is polar and oil is nonpolar, which means they have no attraction for each other. Oil molecules are too large to fit between the closely spaced water molecules in the liquid state.

Do you observe the halide test in the upper layer or lower layer

The crystallization of sodium acetate was exothermic. what would happen to the temperature of solution when you dissolved sodium acetate in water? why would dissociation occur if the solution process is not thermodynamically favorable?

A student has a mass of 90 kg what would his weight be on mars if the acceleration due to gravity is 3.7?

You breathe in 3.0 L of pure oxygen at 298 K and 1,000 kPa to fill your lungs. How many moles of oxygen did you take in? Use the ideal gas law: PV = nRT where R=8.31 L-kPa/mol-K A. 0.05 MOLE B. 1.21 MOLES C. 2.42 MOLES D. 20.0 MOLES

Why is it incorrect to balance a chemical equation by changing the subscripts?

A solution of CuSO4 is labelled 0.01 M. How much CuSO4 in grams, must be used to make 1 liter of solution? A) 1.120 g B) 1.595 g C) 1.6 g D) 15.0 g

Rank the following elements according to their ionization energy: tin krypton antimony arsenic

Water (3030 g) is heated until it just begins to boil. If the water absorbs 5.49*105 J of heat in the process, what was the initial temperature of the water?

Identify the number of core and valence electrons for each atom. Xe : core electrons Xe : valence electrons Ca : core electrons Ca : valence electrons Br : core electrons Br : valence electrons