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n ethanol solution is prepared by dissolving 15 mL of ethanol (C2H5OH) (density: 0.850 g/ml) in a sufficient volume of water to produce 120 mL of solution with a density of 0.980 g/mL. What is the concentration of ethanol in this solution expressed as:
As a firm believer in the idea of sustainability, you were able to discover a cheap and efficient technology of recycling plastic bottles and single use bags into various products. To make this technology a profitable business opportunity, your firm collaborates with Adhuna Ltd. which is in the production of plastic helmets for construction purposes and plastic durables for households. Given this product range, your firm has the following two production opportunities:
● In the first case your estimated annual revenue is Rs. 2,50,000, and the production will cost you Rs. 80,000.
● In your second option, you expect to sell 2000 helmets every year at Rs. 100 each, and the average total cost of every helmet will be Rs.20.
a. Which production opportunity will you choose and why?
b. If you do so, what will be your economic profit?
In line with the overall development of the health infrastructure, the state governments across the country provides a grant of Rs.6,00,000 each year to various laboratories across various organisations to conduct cancer research, where the costs of operating the research lab is Rs.3,00,000. Prima Donna, which is a leading alcohol beverage manufacturing company, offers funding of Rs. 8,00,000 each year to do beer research, but researching on beer would increase costs by Rs. 50,000.
1. What is the opportunity cost of conducting cancer research? Break this into implicit and explicit costs.
2. What option will the department choose? What are the opportunity costs of this choice?
Marites walks 3.0 m due East and 4.0 m due North. Find the displacement of marites using graphical method.
write a python function Separate_List(A) (Refer RollNo_W8B_2.py ) which take list A as input and return five lists, one contains all prime numbers in A, second one contains composite numbers in A, the third list contains all numbers in A which are neither divisible by 2, fourth and fifth list contains number divisible by 3 and 5
1. A 15kg block of wood is at the top of the table. What is the normal force exerted by the table on the block?
a. 741N c. 1.53N
b. 147N d. 24.8N
constraints in a molecular system
1. Constraints on the number of independently moving particles; i.e., on whether the particles must move as an aggregate or can move separately.
2. Constraints on the direction of motion.
3. Constraints on the volume in which the motion is executed
How thermodynamic properties, in particular Entropy, would now respond to these constraints.
Assume that 99.7% of grade 11 students have weights between 45 kg and 60 kg and the data are normally distributed.
a)find the mean
b) compute the standard deviation
c) construct the normal curve of the normal distribution
Phosphoric acid (H_{3}*P * O_{4}) can be prepared from phosphorus triiodide (P*l_{3}) according to the reaction:
PI 3 (s)+H 2 O(l) H 3 PO 4 (aq)+HI(g)
Balance the equation. If 150 grams of Pl_3 ( MM=411.7 g/mol) is added to 250 milliliters og H 2 O(MM=18.01 g / mol , rho=1.00 g mL ) identify the limiting and excess reagents. How many grams of H3PO4 (MM=97.99 g / mol ) will be theoretically produced?
The neutralization reaction between hydrochloric acid (HCI) and calcium hydroxide [Ca(OH) 2 ] produces calcium chloride (CaCl_{2}) and water.
2HCl(aq) + Ca(OH)₂(s) → 2H₂O(l) + CaCl₂(aq)
If 0.75 grams of Ca(OH) 2 is used in the reaction, determine the following:
a.) number of moles of HCI(MM = 36.46 g/mol) needed to completely react with Ca(OH) 2 . The molar mass of Ca(OH) 2 is 74.10 g/mol.
b.) mass of CaCl₂ (MM 110.98 g/mol) formed in the reaction.
