The burning of coal releases heat salt dissolving in water is physical change?

True

False

What volume of benzene (C6H6, d = 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according to the following reaction?2 C6H6 (l) + 15 O2 (g) → 12 CO2 (g) + 6 H2O (g) ΔH°rxn = - 6278 kJ

Given the equation: butanoic acid + 1-pentanol catalyst water + X To which class of organic compounds does product X belong?

What determines the number of possible sublevels?

When magnesium is ignited in air, the magnesium reacts with oxygen and nitrogen. The reaction between magnesium and nitrogen is represented by the unbalanced equation below.

Which statement about AHf is true? O It is zero for any compound in its standard state. It is positive when the bonds of the product store more energy than those of the reactants.

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease

A Material made of equal parts is called what? A. Atom, B. Pure substance, C. Mixture