A chemist decomposes samples of several compounds; the masses of their constituent elements are shown. Calculate the empirical formula for each compound. . 1.443 g Se, 5.841 g Br

two compound of Cl and X are found to have molecular masses and % CI, by mass, as follows: 174 u, 81.6% Cl: 246u, 86.9% Cl. what is element X

On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46 Ti 48 Ti Abundance 72.700% 45.95263 10.500% 47.94795 50 Ti 16.800% 49.94479 What is the average atomic mass of titanium on that planet? u average atomic mass = - TOOLS x10

Explain the different ways to represent compounds. Why are there so many?

II. Determine the empirical formula formulas of the following compounds given their molecular formulas.

When a chemical reaction occurs, atoms rearrange to form now compounds, but no new atoms are created nor are any destroyed This concept is called conservation of mass. Mass conservation can be seen in a balanced chemical equation where the numbers of each kind of atom are the same on both sides of the reaction arrow. The figure (Figure 1) shows the reaction of element A (lavender spheres) with element B (tan spheres). Write the balanced chemical equation for this reaction in terms of A and B. Express your answer as a chemical equation. When balancing chemical equations with polyatomic ions, it may help to balance the ion as a whole. For example, the ion PO_4^3 can be treated as a unit and balanced in both the reactants and the product, or you can break it down and balance each atom separately. Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction: Balance the equation, then enter the coefficients, in order, in the answer…