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The alkali metals (M) are a highly reactive group of elements that react with water according to the following reaction: 2M(s) + 2H2O(l) → 2MOH(aq) + H2(g) Which of the following alkali metals will react the most violently with water? Sodium…
A man drives a go-kart around a circular track with a diameter of 50 m, at a rate of 314 m What is the frequency at which he circles the track in hertz (Hz)? 0.0027 Hz 0.03 Hz 2 Hz…
One mole of an unknown compound is determined to have a molecular weight of 86 grams per mole. The mass percent of the compound is as follows: 55.81% carbon, 6.98% hydrogen, and 37.21% oxygen. What is the empirical formula and…
Antidiuretic hormone (ADH) is responsible for the retention of water in the body. In the kidney, ADH increases reabsorption at the collecting duct. Which of the following physiological responses will be most likely in a patient suffering from severe dehydration?…
Similarities in chemical behavior can be observed between elements within the same family in the periodic table. For instance, sodium and potassium react with oxygen to produce a metal oxide. Which of the following gives the balanced reaction for the…
What is the oxidation state of chromium in the dichromate ion, Cr2O72-? -2 0 +6 +12 Click for Explanation The rules for oxidation states are as follows: 1. In a compound, oxidation states of all elements sum to the net…
Mono-nucleated muscle cells are a predominant muscle fiber found in all of the following EXCEPT: the stomach the pharynx the heart the lungs Click for Explanation This question is testing your familiarity with the predominant muscle cell types found in…
The combination of the cornea and the crystalline lens shown below serves as a converging lens. In a perfectly functioning eye, an image is projected at a fixed distance on the retina, which is approximately 2cm from the lens. What…
Which of the following pure compounds form ionic bonds? CaCl2 HCl NaF Mg(OH)2 I only I and II only I, III, and IV I, II, III, and IV Click for Explanation An ionic bond is formed between two atoms when…
Color blindness (B) is a recessive (b) sex-linked disorder that results from a mutation on the X chromosome. What would be the most likely phenotypes of the male and female progeny when a colorblind man and a woman with no…