Balance chemical equation Fe3O4 = Fe + CO2

As the density of a substance increases, the volume of a given mass of that substance__. a. Increases b. is not affected c. decreases d. fluctuates

Which one of these salts will form an acidic solution upon dissolving in water? Select one: a. LiBr b. NaF c. NH4Br d. KOH e. NaCN

If a reaction solution at equilibrium is cooled down and the color shift moves toward the reactants, is the reaction endothermic or exothermic?

Does heating a cup of water allow it to dissolve more sugar? the 2 variables: 1. water temperature 2. amount of dissolved sugar what is the dependent variable (dv) ?

What is the molar Mass of 2.4g of oxygen

What are beta particles

25. The periodic table is based on an element's A. atomic number. B. molecular size. C. molecular mass. D. atomic mass.

Consider the set of isoelectronic atoms and ions a2-, b-, c, d+, and e2+. which arrangement of relative radii is correct?

Wow many pairs of electrons are shared in the following types of covalent bonds? a. a single bond b. a double bond c. a triple bond

Kepler's second law of planetary motion states which of the following? Planets cover the same area during equal time periods while orbiting the sun. Planets move at a constant speed around the sun.