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Chemistry

Which statements best describe shared characteristics?

Which statements best describe shared characteristics? The statement that describes shared characteristics best is “Shared characteristics can be new characteristics that have been modified from what was found in the common ancestor”. Shared characteristics are the derived characteristics that we get from our ancestors. Which best describes how shared characteristics can be used to identify […]

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Where is the coldest place in the solar system?

Where is the coldest place in the solar system? WASHINGTON — Astronomers have found the coldest spot in our solar system and it may be a little close for comfort. It’s on our moon, right nearby. NASA’s new Lunar Reconnaissance Orbiter is making the first complete temperature map of the moon. It found that at […]

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Do hurricanes form near the equator?

Do hurricanes form near the equator? Hurricanes are the most violent storms on Earth. They form near the equator over warm ocean waters. Actually, the term hurricane is used only for the large storms that form over the Atlantic Ocean or eastern Pacific Ocean. The generic, scientific term for these storms, wherever they occur, is […]

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What are the proportions of gases in the atmosphere?

What are the proportions of gases in the atmosphere? Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere. How has the composition of the Earth’s atmosphere changed? Water […]

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What is atomic mass and mass number?

What is atomic mass and mass number? Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element’s isotopes. The mass number is a count of the total number of protons and neutrons in an atom’s nucleus. What number is the atomic mass? Its […]

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What is the effective nuclear charge of yttrium?

What is the effective nuclear charge of yttrium? 3 How do you find the effective nuclear charge of an element? The effective nuclear charge is the net positive charge experienced by valence electrons. It can be approximated by the equation: Zeff = Z – S, where Z is the atomic number and S is the […]

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Which equation describes what happens in photosynthesis?

Which equation describes what happens in photosynthesis? The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen. How are the reactants represented in the chemical equation for photosynthesis 6CO2 O2 6CO2 6H2O C6H12O6 6O2 C6H12O6 6H2O? The balanced […]

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