What do political boundaries describe?

water systems

deserts

mountains

a country's borders

One chemist claims that a new compound will inhibit the growth of a virulent strain of bacteria. When a second chemist from a different laboratory tests the compound against the same bacterial strain, the bacteria grow at their normal rate.

In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the force need to pull ions apart), which affects the enthalpy of solution.

Here are approximately 15 milliliters (mL) in 1 tablespoon (tbsp). Which expression can be used to find the approximate number of milliliters in 3 tbsp? 1 tbsp x 15ml/3tbsp 1 tbsp x 3ml/15tbsp 3tbsp x 1 tbsp/15ml 3tbsp x 15ml/1tbsp

1. How many grams of nitrogen gas are produced when 47.9 mol of ammonium dichromate are decomposed in the following unbalanced equation? (NH), Cr, O. / (aq) - Cr Og (aq) + H2O + N2 (9)

How many molecules are in 95.75 g of Calcium chloride?

Correctly identify the generic formula for a synthesis reaction. a. AB + A+B b. A+B → AB c. CxHx + O2 → CO2 + H2O d. AB + C + AC + B e. AB + CD → AD + CB

Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?

Nonrenewable resources are?

Watch the animation, then check off the samples that will conduct electricity. Check all that apply. View Available Hint (s) Check all that apply. NaCl solution Solid NaCl Solid sugar Sugar solution

Burning wood represents a chemical change. True or False?