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Bell Ringer Quiz 1 (Unit1) – TEKS 8.6E: Conservation of Mass and Chemical Equations
Quiz by Grade 8 Science - Texas Education Agency
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​A chemical equation is shown.
Which statement correctly compares the number of atoms in the reactant and in the products?
The number of atoms in each molecule of liquid water is equal to the number of atoms in each molecule of oxygen gas.
The number of atoms in each molecule of hydrogen peroxide is equal to the number of atoms in each molecule of oxygen gas.
The total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in the liquid water and oxygen gas molecules.
The total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in each molecule of liquid water
A chemical equation is shown.
Which statement correctly compares the number of atoms in the reactant and in the products?
A student measures the mass of a tarnished silver ring and 50 mL of a baking soda solution. The student puts the ring in a pan, adds the baking soda solution to the pan, and stirs it well. After 30 minutes, the student removes the ring from the pan, and it appears shiny and new. The student observes tiny, yellow flakes in the solution at the bottom of the pan.
What is the student MOST LIKELY to discover about the mass of the ring and solution after the ring is removed from the pan?
