December 2020

Consider two blocks connected by a string (call this the internal string) and being pulled vertically upward by another string (the external string) attached to block A. Suppose that blocks A and B have masses of 3.0 kg and 2.0 kg, respectively, and suppose that the external string’s tension has a magnitude of 55 N. The internal string’s mass is […]

An aqueous solution containing both Sr2+ and CO32– ions is mixed in order to precipitate SrCO3(s). Given there are 1.50 mL of 2.53 MSr2+ ions, calculate the mass of SrCO3 that is formed. Assume that all of the Sr2+ ions are consumed. The net ionic reaction is shown below. Sr^2+(aq)+CO2^−3​(aq) –> SrCO3​(s)

According to the Guinness Book of World Records, a woman from Russia, Mrs. Vassilyeva, had 69 children between the years 1725 to 1765. She had 16 pairs of twins, 7 sets of triplets, and 4 sets of quadruplets. Suppose one of the births is randomly selected. Given that Mrs. Vassilyeva gave birth to at least

The lengths of adult males’ hands are normally distributed with mean 191 mm and standard deviation is 7.4 mm. Suppose that 17 individuals are randomly chosen. Round all answers to 4 where possible.What is the distribution of¯xx¯?¯xx¯~ N(,)For the group of 17, find the probability that the average hand length is less than 188.Find the

The Acton Corporation manufactures electrical meters. For August, there were no beginning inventories of direct materials and no beginning or ending work in process. Acton uses a JIT production system and backflush costing with three trigger points for making entries in the accounting system: Purchase of direct materials Completion of good finished units of product

Assume 1 serving of fried chicken is 320 calories. Consider that a food calorie is equal to about 4 kJ of energy, how much energy in a serving size of the fried chicken compares in other situations.  For example, how does this compare to the amount of energy that’s necessary to lift a fully-loaded pickup

Assume 1 serving of fried chicken is 320 calories. Consider that a food calorie is equal to about 4 kJ of energy, how much energy in a serving size of the fried chicken compares in other situations.  For example, how does this compare to the amount of energy that’s necessary to lift a fully-loaded pickup

create Mind Map for Normalizing (heat treatment process) What is the half reaction of KClO3  →  KCl  +  O2 ? What is the oxidation half-reaction and the reduction half-reaction? The lock and key hypothesis  attempt to explain mechanisms of 1.  Sharing of electrons 2. Pinosytosis 3.Vacule formation 4. Enzyme specificity

A high altitude balloon is filled with 1.40 ✕ 104 L of hydrogen at a temperature of 18°C and a pressure of 727 torr. What is the volume (in L) of the balloon at a height of 20. km, where the temperature is −48°C and the pressure is 63.1 torr?

Consider the following electron configurations to answer the questions that follow: The electron configuration that belongs to the atom with the lowest second ionization energy is.