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Which of the characteristics of living things does a virus have and which characteristics is it lacking?
as living: Have genetic material i.e either $"DNA"$ or $"RNA"$. Can undergo mutation. Show irritability. Are capable to reproduce and hence...
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Do all living things have to have all of the characteristics of life? Can something be considered living if they have a only a few characteristics? Why?
Each feature helps the organism to survive and if one is missing it means this organism is threatened. for example organisms cannot stay with out getting nutrients as they will...
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What characteristics of living things does a river demonstrate? What characteristics does it not demonstrate?
A river is made up of abiotic and biotic factors i.e. Non living and living factors. The abiotic factors are water, oxygen, minerals, temperature, water flow , shade, sunlight, depth....
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An element has three naturally occurring isotopes with the following masses and abundances. How do you calculate the atomic mass of this element? What is the identity of the element?
The atomic mass is the weighted average of the atomic masses of each isotope. In a weighted average, we multiply each value by a number representing its relative importance. In...
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There are 3 isotopes of carbon. Carbon-12, Carbon-13 and Carbon-14. The average atomic mass of carbon is 12.011. Which isotope of carbon is the most abundant? Why?
The relative of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass...
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Carbon has a third isotope, named carbon-13. How many protons and neutrons are found in each atom of carbon-13. Carbon-13 is a stable isotope, like carbon-12. How useful would carbon-13 be for radiometric dating?
This is called the of the element. To make it up to 13 in carbon-13, you will need 7 neutrons. Stable isotopes are not useful at all in radio-dating,...
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The atomic mass of element A is 63.6 atomic mass units. The only naturally occurring isotopes of element A are A-63 and A-65. What is the percent abundance in a naturally occurring sample of element A closest to?
The average isotopic mass is the weighted average of the mass of the individual . Because the quoted average, $63.6$ $"amu"$, is closer to $""^63A$ than $""^65A$, the $""^63A$...
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Suppose element X is a poor conductor of electricity and breaks when hit with a hammer. Element Z is a good conductor of electricity and heat. In what area of the periodic table does each element most likely belong?
Metals are good conductors of electricity and heat. the text doesen't tell anymore and Z may be one of abaut 90 known metals, in the left area of . X,...
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The ability to conduct electricity in the solid state is a characteristic of metallic bonding. What is this characteristic best explained by?
Metallic can be defined as a sea of electrons moving freely throughout the metallic crystal structure of the metal. Metals are characterized by low electro negativity. This low electro...
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A compound is broken down into 34.5 g of element A, 18.2 g of element B, and 2.6 g of element C. What is the percent (by mass) of each element?
$%A$ $=$ $(34.5*g)/(34.5*g+18.2*g+2.6*g)xx100%=62.3%$ $%B$ $=$ $(18.2*g)/(34.5*g+18.2*g+2.6*g)xx100%=33.0%$ $%C$ $=$ $(2.6*g)/(34.5*g+18.2*g+2.6*g)xx100%=4.70%$ That is $%" element"$ $=$ $"Mass of element"/"Mass of compound"xx100%$ $"Mass of compound"$ is clearly the SUM of the constituent ....
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