Molecular Structure help?
My teacher didn't teach us in a way we can understand about molecular structure. I am wondering if anyone can help me with a couple questions on our lab. I did half of it. I did 2 and a half of the 5 questions, but I don't understand the other 2 and a half. The questions are as follows: 1. Why is it difficult to draw the Lewis Dot Diagram for NO2? How does NO2- solve this problem? Besides NO2-, describe other ways to resolve this difficulty? 2. Can a neutral NO3 molecule exist? If not, what can be done so that one nitrogen atom and three oxygen atoms can form this molecule? 3. Most of the time phosphorous and sulfur atoms follow the octet rule. However, there are times where phosphorous follows the ten-electrons rule, and sulfur follows either the ten-electrons or the twelve-electrons rule. Why do they happen and what types of orbitals do they involve? I'd greatly appreciate all help I could get considering I don't understand this stuff at all yet! Thanks!!
How is the structure that attaches the leaf to the stem different in monoctos as compared to dictos?
They are the same. Nodes are those a point on stems from which leaves arise. If there is one leaf per node, the leaf arrangement on the stem is called alternate; if two leaves occur at each node, then this arrangement is said to be opposite; and if there are three or more leaves per node this is called a whorled leaf arrangement. Both dicots and monocots have the same basic architecture of nodes, internodes, etc. http://www2.estrellamountain.edu/faculty...
It does depend on the subject and the content of the report to a certain extent, but most scientific reports and papers have the same following structure: TitleAbstract - A short summary of the aim of the investigation and the key findingsNomenclature (optional) - What symbols/notation have you used Introduction - Gives background/motivation for your work, citations and discussions of relevant literature. May also include your aims & objectives, or they may be in their own section.Experimental Method - What did you do and how did you do it? Results - Your data and observationsDiscussion - What does your data mean? what are your interpretations? is it reliable? how does it compare to previous work? Can you explain trends or support your findings with known theories? etc.Conclusions - Statement of your key findingsAcknowledgements (optional)References - Your reference list for in text citationsAppendices (optional) - Useful data or information which is tangential or inappropriate for inclusion in the body of the text.
CO3, better termed CO3(2-) is an anion often seen in inorganic/organic reactions, most notably in the baking soda(NaHCO3) and vinegar reaction (acetic acid). CO3 is unstable in the form of H2(CO3), quickly degrading to water (H2O) and carbon dioxide (CO2).
Organic Chemistry Lab Project Help?
Hi Amy, I suggest you work from the following software : ACD/ChemSketch publishing Freeware ... that you can find on the following site... http://www.acdlabs.com/download/ This software allows to build organic molecules... ... to determine the name of the constructed molecules... ... to determine the bond lengths... ... to determine the values for the angles... ... to make the molecular model of the molecule in the most probable conformation... ... and many other things still...
with the help of
The heart is four chamber organ.CHAMBERS OF THE HEART -RIGHT ATRIUM- Right atrium is chamber that is used to carry deoxygenated blood to the right ventricle.RIGHT VENTRICLE- Right ventricle is a chamber that pumps blood to the lung to pick up oxygen and release carbon-dioxyde.LEFT ATRIUM- Left atrium is a chamber that is used to carry oxygenated blood to the left ventricle.LEFT VENTRICLE - Left ventricle is a chamber used to pump oxygenated blood to the whole body.PULMONARY ARTERY-Pulmonary artery carries dyoxygenated blood to the lung to make the blood oxygenated .PULMONARY VEIN - Pulmonary vein carries oxygenated blood to the heart into the left atrium to the left ventricle.AORTA- Aorta carries oxygenated blood to the whole body.VALVE-TRICUSPID VALVE- Sit like door between right atrium and the left atrium when the blood flows from right atrium to the right ventricle it opens when the heart pumps blood the tricuspid valve closes and prevent the blood flowing back right atrium and makes it go through the pulmonary arteryMITRAL VALVE- Sit like door between left atrium and the left ventricle when the blood flows from left atrium to the left ventricle it opens when the heart pumps blood the mitral valve closes and prevent the blood flowing back left atrium and makes it go through the aortaAORTIC VALVE- When the left ventricle pumps blood through the aorta some of it will fall down due to gravity aortic valve closes and prevent that from happeningPULMONARY VALVE - When the right ventricle pumps blood through the pulmonary artery some of it will fall down due to gravity pulmonary valve closes and prevent that from happening.IN SHORT- THE BLOOD FLOWS FROM THE RIGHT ATRIUM AND FLOWS IN RIGHT VENTRICLE AND THE TRICUSPID VALVE CLOSES AND THE PULMONARY VALVE OPENS AND LET THE BLOOD FLOW THROUGH THE PULMONARY ARTERY AND PICK UP OXYGEN AND RELEASE CARBON DIOXYDE AND GET BACK TO THE HEART THROUGH THE PULMONARY VEIN AND GET INTO THE LEFT ATRIUM AND MITRAL VALVE OPEN AND ALLOW THE BLOOD TO GET INTO LEFT VENTRICLE AND THE MITRAL VALVE CLOSES AND THE AORTIC VALVE OPENS AND ALLOWS THE BLOOD GO TO THE BODY AND AGAIN AND AGAIN TILL YOU DIE.
Structural adaptations are the result of the evolutionary process, which stems from the mutation of genes over time.Which involves some part of an animal's body, such as the size or shape of the teeth, the animal's body covering, or the way the animal moves. Teeth - since different animals eat different things, they don't all have the same kind of teethBody coverings - Hair, scales, spines, and feathers grow from the skin. All of these parts help animals survive in their environments. Movement - animals find food by moving from place to place Some examples include:The duck has webbed feet for propelling it through the water and strong wings to take to flight quickly.The Bill on a bird: The longer beak helps the bird catch more food. Because the bird can catch more food, it is healthier than the other birds, lives longer and breeds more.The fur on a bear : Protection from cold weather.The rabbit's fur changes color according to the seasons to provide camouflage that protects it from predators.The leaves of the carnivorous pitcher plant form cups, or pitchers, that fill with water, drowning insects that they then digest.The theory of structural adaptation comes from Darwin's observation of finches on the Galapagos Islands. The finches had all come from the mainland and were all the same physically at one time. Yet, he saw that in each area of the islands, there were subspecies of finches that had different beaks and adapted to the unique food sources of their specific environment.
CHEMISTRY BONDING LAB HELP! Please!?
CaCl2, CuSO4 and NaCl are ionic substances, the solids are made of + and - ions in a very organized crystal, maintained by electrical froces. When dissolved in water their ions separate. When you apply a certain voltage through a pair of electrodes they conduct electricity because the + ions (Ca2+, Cu2+, Na+) move to the negative electrode and the negative ions (Cl-, SO4=) move to the positive electrode. Instead of electronic conductivity they have ionic conductivity, the ions move instead of the electrons. Sucrose is a molecular solid, there are NO IONS in its structure. There are only covalent bonds in its structure. When you dissolve sucrose in water the molecules, which were organized in the solid crystal, will separate from each other. But when you apply an electric field to the solution using electrodes, the molecules will not move to either + or - side, since they have NO CHARGE. PS: Sucrose molecules may get a little "deformed" close to the electrodes, since they have OH groups which are polar! But that's a small and very short range effect.
Bio fetal pig lab help?
Anthony took my answer Talk about why you're dissecting the pig...what do you expect to learn from a pig that you can't by dissecting say a fish or snake. The pig is used because it's anatomical structure and organs are very similar to humans.