Which element would you expect to have the most similar properties

copper and zinc

nitrogen and oxygen

carbon and silicon

Wich body system makes the energy in food usable for the body to carry out its activities

21.7 ML of gas at 98.8 K PA is allowed to expand at constant temperature in to a 52.7 mL container

Calculate the standard molar enthalpy for the complete combustion of liquid ethanol (C2H5OH) using the standard enthalpies of formation of the reactants and products. C2H5OH (l) + 3 O2 (g) = 2CO2 (g) + 3 H2O

Which pair of elements can form an ionic compound? A) Two atoms of hydrogen B) One atom of sodium and one atom of fluorine C) One atom of calcium and one atom of chlorine D) Two atoms of hydrogen and one atom of oxygen

What is an example of a place formed by hot-spot valcanoes? a. caymen islands b. florida keys c. australia d. hawaiin islands

A molecule from a new organism contains adenine, cytosine, guanine, and thymine. What molecules is being looked at?

In what pH range does phenol red change from yellow to pink

Given the generic chemical reaction below write the rate of the reaction

23 For a reaction at equilibrium, which change can increase the rates of the forward and reverse reactions?

If the formula for potassium chlorate is KClO3 and the formula for magnesium fluoride is MgF2, then what isthe formula for magnesium chlorate?