What is the best way to separate the mixture?

What is the best way to separate the mixture? Summary Mixtures can be separated using a variety of techniques. Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material. Filtration separates solids of different sizes. Who will […]

What is the reciprocal of a period?

What is the reciprocal of a period? The reciprocal of the period, or the frequency f, in oscillations per second, is given by f = 1/T = ω/2π. What is cycle of a wave? A wave is a repeating pattern. It repeats itself in a periodic and regular fashion over both time and space. And […]

What causes copper to form?

What causes copper to form? Most nonrecycled supplies come from porphyry copper deposits (PCDs), which form when hot, metal-bearing fluids percolate up through Earth’s crust. These fluids bubble up through the crust and collect in pores in the rock, where they sit, waiting for the final step that will allow them to form copper minerals. […]

How do children learn observations?

How do children learn observations? Children learn and imitate behaviors by watching and listening to others. This is sometimes called “observational learning,” when children can learn things simply by observing others. Children are learning about the behavioral choices of others and also about the consequences of those behaviors. What are the 3 key concepts of […]

Is Phosphorus 32 Harmful?

Is Phosphorus 32 Harmful? Phosphorus-32 is an energetic beta emitter which can penetrate up to 0.8 cm into living skin tissue. Therefore, this isotope poses an external (skin) dose hazard to persons as well as a potential internal hazard. What type of radioactive decay does phosphorus-32 go through? Phosphorus-32 is a commonly used radionuclide with […]

What happens when zinc reacts with HCl?

What happens when zinc reacts with HCl? When zinc reacts with hydrochloric acid it produces zinc chloride and hydrogen gas. Is Zn and HCl a chemical reaction? When zinc reacts with hydrochloric acid, the reaction bubbles vigorously as hydrogen gas is produced. The production of a gas is also an indication that a chemical reaction […]

What is wrong with carbon dating?

What is wrong with carbon dating? The group theorizes that large errors in carbon dating result from fluctuations in the amount of carbon 14 in the air. Carbon dating is unreliable for objects older than about 30,000 years, but uranium-thorium dating may be possible for objects up to half a million years old, Dr. Zindler […]

Which country has the most tundra?

Which country has the most tundra? The tundra is a treeless polar desert found in the high latitudes in the polar regions, primarily in Alaska, Canada, Russia, Greenland, Iceland, and Scandinavia, as well as sub-Antarctic islands. Why are tundras so cold? The temperatures are so cold that there is a layer of permanently frozen ground […]

Why is Al3+ smaller than Na+?

Why is Al3+ smaller than Na+? Al3+ because they all have the same number of electrons, however Al3+ has the most protons and therefore greatest nuclear charge. In Al3+, the same number of electrons are being attracted by more protons in the nucleus, so the electrons are being pulled closer to the nucleus, reducing the […]

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