Black-crowned night-heron. This predator is adapted to hunt at night. In
the French Guiana this is one of the major night heron species with its
cousin the Yellow-crowned night-heron (Nycticorax violacea). Feeds
mainly on aquatic animals, including fish, amphibians and insects.
Coastal swamps.
How did stromatolites contribute oxygen to the early atmosphere?
by weathering of rocks
through photolysis
through methane degradation
through photosynthesis
Answer:
by weathering of rocks
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Answer:Experiment 1084-04: lodine Clock Reaction Purpose Determine the rate law for an iodine clock reaction and study the influence of st on that reaction abruptly that it can be as startling as the sudden sound of an alarm clock, hence the clock reaction Background Information chemical equations can be written for chemical reactions, only some will proceed while others do not. Among the ones that do proceed some reactions occur as soon as reactants are mixed, while others occur over minutes, hours, or n over several years. What are the controlling in predicting if a reaction will take place and the speed at which it will? Thermodynamics can answer the question, "Will the reaction take place?" Once the reaction is capable of proceeding kinetics can answer the other question, "How fast You will study the rate of the reduction of potassium persulfate, KoS Os, with sodium iodide, Nal. The net ionic equation for the reaction is eve The rate law for this reaction is in the form of And you will need to determine the reaction orders a and b, as well as the rate constant, k. Keep in mind that exponents can not be determined by jus looking at the chemical equation the reaction will take place? The rate of a reaction is defined as the increase in molar concentration of product of a reaction per unit time or the decrease in molar concentration of reectant per unit time. The usual unit for the rate is moles per liter per sec (mol/L s or M/s). Experimentally, it has been found that a reaction rate depends on the concentrations of the reactants. Usually a higher reactant concentration increases chance of collision among the reactants per unit time causing a faster reaction rate. An equation describing the relationship between the reaction rate and the concentration of the reactants You will need a way to determine how much of the reactants were spent over the given time period. Preferably, the concentrations of the reactants should not change too much; therefore the reaction rate can be represented by the initial concentrations of reactants (the initial-rate method). In this experiment, we will couple another reaction that consumes the product, 12 very quickly. The new reaction is the reduction of is called a rate law. For the elementary reaction Note that l2, which was produced in reaction (1) is consumed as fast as it is produced by reaction (2) to regenerate two l. i.e. [门is kept constant. By keeping [S203-9 much smaller than the initial concentration of S,0, we can assure [S20,1 is also kept nearly constant when S203 is completely consumed. At this point, the 12 is no longer eliminated by the reaction and starts to accumulate. This point is signaled by sudden appearance of the dark color from the interaction of l2 with starch indicator. We can measure the time elapsed till the color appears Rate k [AIB] The proportionality constant, k, is called the ate constant in the relationship between the rate nd concentrations. The rate constant has a fixed alue as long as the reaction temperature is held nstant. The exponents, a and b, are called the action order, and are frequently, but not always, egers. More importantly, they must be termined experimentally In this experiment you will determine the rate an iodine clock reaction, and study the effects of perature and a catalyst to the reaction rate ugh there are several versions of an iodine k reaction, all of them share a common feature: completion of the reaction is signaled by the en appearance of a dark purple color. This is characteristic of the interaction between cular iodine and starch. When the reaction is ed out correctly, this color will appear so According to the reaction stoichiometries of reactions (1) and (2), two molecules of S203 are required to counteract the consumption of one molecule of S20a2. Since S2032 would have been completely consumed when the dark purple color appeared, the Δ[SO ] should be % of the initial concentration of S203 15-08-2] = ½ initial [S,03-21
Answer:
It is known that the lungs and mouth are associated with a passage known as trachea. At the time of an infection, if there is a passage between the lungs and the mouth, the body makes a fluid known as sputum, also known as phlegm. By coughing the body is in real sense attempting to get rid of this phlegm.
The most general pathogens, which are found in Sputum culture are Haemophilus influenzae, Streptococcus pneumonia, Mycobacterium species, and Staphylococcus aureus. In the given case by observing the symptoms demonstrated by Navin, one can presume that Navin is suffering from Tuberculosis.
The disease is the result of Mycobacterium tuberculosis bacteria. These are the pathogenic bacteria, that comprise a mycolic acid on its cell surface. Due to the presence of this coating, it is tough to determine it with the help of Gram staining. Thus, Acid-fast staining, like Zehl-Neelsen is used.
These bacteria are aerobic in nature and need a huge concentration of oxygen, it mainly infects the respiratory system of the mammals, and generally spreads from infected persons via sneeze, coughing, talks, or laughing. Smoking is also a supplementary element of the condition. The major symptoms of the condition are weight loss, fatigue, severe cough, no appetite, chest pain, and night sweats.
The sky is blue because blue<span> light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. </span>Blue<span> is scattered more than other colors because it travels in shorter and smaller waves. This is why we see a </span>blue sky most<span> of the time. Hope this helps!</span>
