Which material does not melt at any temperature?

A. Ethanol, a molecular compound

B. Iron, a metallic element

C. sodium chloride, an ionic compound

D. Wood, a mixture of different substance

What are translation metals

Every econimics desicion has

A sample of gas occupies a volume of 57.7 mL. As it expands, it does 128.5 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?

Place the object into the graduate cylinder and record the new volume of water

Which particle of the atom has a positive charge? A. proton B. electron C. nucleus D. neutron

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.