The simplest type of stream cipher, one in which one letter or character is exchanged for another, is known as what?

What type of reaction is C 12 H 22 O 11> 12C+11H2O

Which has more mass, a 28.0-cm3 piece of lead or a 16.0-cm3 piece of gold? the density of lead is 11.4 g/cm3; the density of gold is 19.3 g/cm3?

Consider the following reactions. (Note: (s) = solid, (l) = liquid, and (g) = gas.) Mg (s) + ½O2 (g) → MgO (s) + 146 kcal/mole H2 (g) + ½O2 (g) → H2O (g), ΔH = - 57.82 kcal/mole The temperature of the surroundings will: increase decrease

What mass in kilograms of CO2 is needed to fill an 80.0 L tank to a pressure of 150.0 atm at 27.0 C

How are magnetic objects able to be affected by each other even when not in contact with each other?

What do you call all elements that are clearly not metals? ? nonmetals ? metalloids

Which of the slightly soluble salts below will be more soluble in acidic solution than in pure water? a. Mg (OH) 2 b. CaCO3 c. AgCl Mg (OH) 2 d. only Mg (OH) 2, e. CaCO3, and f. AgCl g. CaCO3 only h. both Mg (OH) 2 and CaCO3

What type of chemical bond is formed between two atoms of bromine 1. Metallic 2. hydrogen 3. Ionic 4. covalent

Before oceanography was recognized as its own branch of science it was part of A. Physics B. Chemistry C. Geometry D. Natural science

For a chemical reaction to be spontaneous at all temperatures, which of the following conditions must be met? a. ΔS° > 0, ΔH° > 0 b. ΔS° > 0, ΔH° < 0 c. ΔS° < 0, ΔH° < 0 d. ΔS° 0 e.