The formula K2S indicates that:

A. the potassium ion is twice the size of the sulfur ion

B. sulfur and potassium form a double covalent bond

C. there are two potassium ions for each ion of sulfur

D. there are two sulfur ions for each potassium ion

What types of intermolecular forces exist between nh3 and cbr4?

What elements on the periodic table make up amazonite?

Of the reactants and product determines whether energy will be released or absorbed during a chemical reaction

Which of the following is true concerning atoms? A. Atoms are made of even smaller substances called subatomic particles B. The properties of atoms cannot be measured or observed

What is the PEN for flourine?

Energy stored in the bonds that hold together the atoms and molecules of all substances is called Energy stored in the bonds that hold together the atoms and molecules of all substances is called

Which of the following requires an oxidizing agent? Al yields Al3+ 2 O yields O2 Cl2 yields 2 Cl- Ag + yields Ag

If a color change occurs when two solutions are mixed has a chemical reaction likely occurred?

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.