How many atoms are equal to 1.5 moles of helium?

Which of the following element combinations will likely form monatomic ions not polyatomic ions? 1. Argon and krypton 2. Potassium and iodine 3. Carbon and nitrogen 4. Oxygen and nitrogen

A belief judgement or way of thinking about something is called?

Naturally occurring indium has two isotopes, indium-113 (112.9040580 amu) and Indium-115 (114.9038780 amu. The atomic mass of indium is 114.82 amu. What is the percent of indium-115? a) 4.32% b) 48.4% c) 95.7% d) 0.973%

Which statement is part of Bohr's atomic model? Electrons absorb or emit light when they change energy levels. Electrons with the highest energy are found with orbits of the smallest radius.

Give the nuclear symbol for the isotope of beryllium for which a=10? enter the nuclear symbol for the isotope (e. g., 42he).

Calculate the number of H atoms in 0.190 mole C 6 H 14 O .

What fuel is produced by the electrolysis of water? chlorine gas hydrogen gas natural gas oxygen gas

Model describe how you would show j. j. thomson's model of the atom using small beads and clay

Switching one substance for another is called ... ? a) displacement b) synthesis c) decomposition d) oxidation

C2h4 + O2 - CO2 + H2O If we start with 20 grams of CH4, how many moles of CO2 will form?