12. Describe the results of a chemical change. List four

indicators of chemical change.

What is the introduction of separating salt and sugar?

Which one of these salts will form a basic solution on dissolving in water? A. NaCl B. KCN C. NaNO3 D. NH4NO3 E. FeCl3

Spectrum of wavelength that range from approximately

How many milliliters of calcium, with a density of 1.55 g/mL, are needed to produce 98.5 grams of calcium hydroxide in the single-replacement reaction below? Show all steps of your calculation as well as the final answer. Ca + H2O → Ca (OH) 2 + H2

For the equation CaCO3 (s) + 2HCl (aq) → CaCl2 (s) + H2 (aq) + H2O (l), 100.00 g of CaCO3 pellets are combined with 250 mL of HCl of a 2.0 M solution. Which of the following will increase the rate of the chemical reaction? A.

Testing a hypothesis is called a

When molten rock undergoes crystallization above ground, what type of rock results? a. intrusive igneous rock b. extrusive igneous rock c. metamorphic rock d. sedimentary rock

A 150ml sample of hydrochloric acid completely reacted with 60.0mL of a 0.100 M NaOH solution. What was the original concentration of the HCl solution

Rearrange in to a quadratic 5.333 = (0.6 + 2p) ² / (0.135 - p)

How hot would a 2.3 L balloon have to get to expand to a volume of 3.0 L? Assume the initial temperature of the balloon is 24 °C, and that the pressure inside the balloon remains constant. A. 3 K B. 42 K C. 128 K D. 390 K