The ash produced by the burning paper has much less mass than the mass of the original paper. Was mass conserved during this change? Explain your answer.

One type of water softener is precipitation softening, also known as ion-exchange. Based on the reactants used (Na2CO3 and CaCl2), what ions would remain in the softened water that would be consumed by the homeowners?

How is the thermal energy of a substance related to its physical state

2. What is the importance of meiosis and fertilization in sexual reproduction?

For a process at constant pressure, 24,800 calories of heat are released. This quantity of heat is equivalent to

Earth's surface area is 5.10 * 108 km2, and its crust has a mean thickness of 35 km and mean density of 2.8 g/cm3. The two most abundant elements in the crust are oxygen (4.55 * 105 g/t) and silicon (2.

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide

Which stament best describes a solution

Which answer accurately describes the difference between speed and velocity? Read each answer choice carefully. Question 4 options: A. If speed is constant, then velocity is also constant. B. Speed requires direction.

Least reactive element of period 3

A chemical formula shows the kind and number of Atoms that form a what? compound, mixture, solution, or suspension