Answer:
The answer is True
Explanation:
Cyclic hydrocarbons are organic compounds that consist of carbon and hydrogen atoms that bond to form rings or cyclic structures. The simplest are cycloalkanes, hydrocarbons formed by a closed carbon chain with all the simple bonds.
There is a very special group of cyclic hydrocarbons called aromatic hydrocarbons. Its name is due to the fact that the first to be discovered had pleasant smells. They all start from a basic structure that can be repeated many times. An example of this type of hydrocarbon is bancene.
Answer:
B
Explanation:
H2 + O2 => H2O.
Then, balanced, as
2H2 + O2 = 2H2O
There we see that we need 2 times more mol of H2 than O2. So mol of O2 is 1/2 mol of H2. That is 27.4 mol / 2 = 13.7 mol.
Paints consist of pigments, solvents, and binders. Once the paint has been applied and has dried, the pigments are still able to be determined and matched to other samples.
Manufacturers apply a variety of coatings to the body of an automobile, which adds significant diversity to automobile paint. This diversity makes it easier of the forensic scientist to compare different paint samples.
When paint specimens possess colored layers that match with respect to number and sequence of colors, the examiner can begin to think confidently in terms of relating the paints to a common origin.
The shortcoming of analysis of paint layer structures is the most paint specimens presented to the criminalist do not have layer structure sufficiently complex to allow individualization to a single source.
Therefore, Paints consist of pigments, solvents, and binders. Once the paint has been applied and has dried, the pigments are still able to be determined and matched to other samples.
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Subatomic particles are particles smaller than an atom. Therefore, any element or matter larger than these particles such as molecules, compounds, or cells can be considered as non-examples.
The question asks for non-examples of subatomic particles, that is, elements that do not fall within the category of subatomic particles. Subatomic particles are particles smaller than an atom, such as protons, neutrons, and electrons. Therefore, any element or matter larger than an atom would be a non-example of a subatomic particle.
Examples of non-examples include molecules like water (H2O), oxygen (O2), or carbon dioxide (CO2). These are made up of multiple atoms and thus are larger than individual subatomic particles. Similarly, compounds like salt (NaCl) or sugar (C12H22O11) are also non-examples because they are made of multiple atoms as well. Cells, the basic structural units of living organisms, are much larger than subatomic particles and also represent non-examples.
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Answer:
Along with solving the question, I'll try to clear the concepts involved.
Distance: Total path actually traversed by the object.
Distance is a scalar quantity. Hence, No need to consider the direction.
Here the object…
First travelled 30 m towards East & then travelled 40 m towards North.
Distance = 30 m + 40 m = 70 m
how many moles are in 9.8 grams of calcium?
According to mole concept, there are 0.245 moles in 9.8 grams of calcium.
Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Number of moles=mass/molar mass=9.8/40=0.245 moles.
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Only powerful X-rays can be used.
Only beta particles can be used.
Only alpha particles can be used.
Answer:
Only powerful x-rays can be used
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