. If 15 grams iodine are combined with 15 grams rubidium to form rubidium bromide, what will be present at the conclusion of the reaction? 0.176 moles rubidium iodide only 0.176 moles rubidium iodide and 0.059 moles iodine 0.118 moles rubidium iodide only none of these 0.118 moles rubidium iodide and 0.058 moles rubidium
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
1. If 15 grams iodine are combined with 15 grams rubidium to form rubidium bromide, what will be present at the conclusion of the reaction?
0.176 moles rubidium iodide only
0.176 moles rubidium iodide and 0.059 moles iodine
0.118 moles rubidium iodide only
none of these
0.118 moles rubidium iodide and 0.058 moles rubidium
2.
If 30.0 mL of 1.00 M DNO3 solution is mixed with 20.0 mL of 1.00 M M2CrO4 solution the precipitate X2CrO4 is formed. What species is/are present in solution after the reaction is complete? Note that the precipitate itself is not considered to be in solution. Select all that apply.
D+
none of these
water
CrO42-
NO3-
M+
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