The number of valence electrons in an atom that has an atomic number of 13 is

Which is usually associated with a slower reaction rate? A. using a whole solid in the reactants B. adding heat energy to the reactants C. adding food coloring to the reactants D. using a strong solution of the reactants

After 17.1 thousand years, what percentage of the original carbon-14 would be left in an organisms remains?

If aqueous solutions of pb (no3) 2 and nacl are mixed, which ions, if any, are spectator ions?

What is the molality of a solution prepared by dissolving 82.2 g of ethylene glycol, hoch2ch2oh, in 1.50 l of water? assume the density of water is 1.00 g/ml?

Consider a radioactive sample with a half-life of one week. How much of the original sample will be left at the end of the third week?

If the products of a certain reaction are favored (i. e., the ΔG value of the reaction is negative), one would expect a significant amount of product to form when the reactants are combined.

Water (H2O) is not found on the periodic table of the elements because water is

Predict the chemical formula of butyne, having one carbon-carbon triple bond.

Based on the formulas, select the compounds below that are covalent: KBr SiF4 Al2O3 CO2 NaCO3 S7O2 PCl3 Fe3N2 H2O S2F10

In the process of oxidizing i - to i2, so42 - is reduced to so2. how many moles of so2 are produced in the formation of one mole of i2? express your answer numerically in moles.