Explain how calcium (40Ca20) and flourine (19F9) became stable when they form calcium fluoride.

A solution is produced in which water is the solvent and there are four solutes. Which of the solutes can dissolve better if the solution is heated?

Pollutants that chemically react with oxygen and water in the atmosphere to form strong acids that contaminate rain include

Leon uses a pressure gauge to measure the air pressure in one of his car tires. The gauge shows that the pressure is 220 kilopascals. The temperature is 297 K, and the outdoor air is at standard pressure. If the tire contains 4.

The pH scale is called the logarithmic scale what does this mean?

Two most abundant elements in Earth's core are

At a certain temperature, the equilibrium constant, kc, for this reaction is 53.3. h2 (g) + i2 (g) â½âââ2hi (g) kc=53.3 at this temperature, 0.700 mol of h2 and 0.700 mol of i2 were placed in a 1.00-l container to react.

2 Calculate What is the density of a liquid with a mass of 17.4g and a volume of 20 mL?

After concluding his research, which statements would Virchow agree with? Check all that apply. Living things come from nonliving things. Cells can come from nonliving materials. Frogs can come from mud.

2. Look up Boyle's law in a science textbook. How do the results of the experiment support or contradict Boyle's law?

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