Which of the following will result in a chemical change?

A. Drying wood in a shed

B. Melting ice to obtain water

C. Burning coal in a furnace

D. Evaporating alcohol into vapor

A laboratory experiment requires 4.8 l of a 2.5 m solution of sulfuric acid (h2so4), but the only available h2so4 is a 6.0 m stock solution. how could you prepare the solution needed for the lab experiment?

Calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids. Calculate the molarity of a solution prepared by diluting 165 ml of 0.688 m calcium chloride to 925.0 ml.

The bonds in the compound MgSO4 can be described as A. ionic, only B. covalent, only C. both ionic and covalent D. neither ionic nor covalent

Drawing conclusions can often be difficult for scientists because the data may?

Explain a dipole-dipole relationship

When magnesium combines with oxygen, the reaction involves a. a conversion of protons into electrons. b. sharing of electrons between Mg and O. c. transfer of electrons from Mg to O. d. transfer of electrons from O to Mg.

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol.

What process transform solar energy into chemical energy?

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?