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You have 2 dice both six-sided. If one is red and other is green find probability that number of red dice is greater than or equal to one on green dice?
The volume of a spherical molecule can br estimated as V=b/4NA where b is the van der Waals parameter and NA is Avogadro's number. Justify this relationship by considering a spherical molecu
If 47.0 calories of energy raised the temperature of a lead sample from 28.3 degrees Celsius to 30.1 degrees Celsius calculate the mass of the sample where the specific heat for lead is 0.0380cal/g
Explain what happens to density when gas is compressed (volume decreases)? Discuss at the atomic level. Explain why do many complex ions produce colored solutions?
If demand is high, manager has 3 choices: (i) Do nothing, that has NPV of $120,000; (ii) Subcontract, that has NPV of $140,000; and (iii) purchase second machine, with NPV of $130,000. Sketch the de
What information would you need to determine which one is denser? The atoms of 2 elements have the same atomic radius and they are packed together the same way.
When a solution of sodium lactate, CH3CH (OH) COONA, is mixed with an aqueous copper(II) solution, it is possible to obtain a solid salt of copper(II) lactate as a blue-green hydrate,(CH3CH(OH)COO)2
How many kJ of heat wood would it take to convert 50.0mL of ice at 0 C to liquid water at 22 C? The enthalpy of fusion of water is 6.0 kJ/mol and the specific heat capacity is 75J/mol C
When Cu+2 and Fe+3 reaction with the NH3 solution they produce two different types of products, One is a precipitate and one is a complex ion in solution. Write down the equations for thes
If four apartments are selected at random to be redecorated, find probabilities that (i) All will be two-bedroom apartments? And (ii) 2 will be 2-bedroom apartments and two will be 3-bedroom apartme
Discuss what the reaction is and how the initial precipitate is dissolved and reprecipitated. Use equations in your explanation.
Determine the molarity of a solution of sodium hydroxide, NaOH, if 23.64 mL is required to neutralize the .5632 g of potassium hydrogen phthalate.
Determine the equivalent mass of the acid if is found that 24.68 mL of .1165 M NaOH is required to titrate .2931 g of an unknown acid to the phenolphthalein end point.
Explain at what pH will bromothymo blue change color? What does the selection of this indicator tell you about the probable Ka of KHP?
Illustrate a Newman projection of a confirmation of 2-bromo-1-chloropropane (viewing along the carbon-carbon bond among the first and second carbon atoms) in which the two halogens are as far apart
Write reduction and oxidation, half reaction equations as well as the net reaction equation, to explain the empirical of magnesium chloride. The empirically determined chemical formula for magnesiu
What is the molar mass if there are four iron atoms per molecule? A sample of hemoglobin is found to be 0.335% iron. If hemoglobin contains one iron atom per molecule, what is the molar mass of the
What is the molar mass of this compound? The weight percent of oxygen in an oxide that has the formula MO2, is 15.2%. What element or elements are possible for M?
Determine probability company will have banner year? Over the twenty year period, find probability company will have more than seven banner years?
You are given 10g of benzoic acid. Calculate the amount of water that you would use to re-crystallize the sample. The solubility of benzoic acid in water is 6.8g/100mL at 95Cand 0.3g/100mL at 25C.
Write down a balanced chemical equation that shows the preparation of synthesis gas (carbon monoxide and hydrogen) from oxygen and methane.
The age of wine can be determined by measuring the trace amount of radioactive tritium, the concentration of which diminishes by a first order radioactive decay with a half life of 12.5 years once t
What would be the concentration of H3O+ at the end point when 0.1 M NH3 solution is titrated by0.2 M HCl solution.
Determine the order of decreasing freezing points of the four solutions? (i) .5M H2SO4, (ii) .5Mglucose, (iii) .5M NaCl, and (iv) .5M CaCl2
The alum is soluble and releases aluminum, potassium, and sulphate ions. Discuss, based on the fact that Al+3 form a weak base with hydroxide, how baking powder works. Be sure to incorporate how hy