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If you have 8.22 x 1024 molecules of N2O, how many grams of N2O do you have?


It costs a bakery Php 15 to make a loaf of bread and Php 30 to make a pineapple pie. Production costs of these items cannot exceed Php 300. There must at least be 15 of these items. Let x represents the total number of loaf bread to be made, and y be the number of pineapple pie.Which system of inequalities shows the various combinations of the bakery can produce with these two items?

Determine the charge of each atom if it is composed of the following particles:


1. 5 electrons and 5 protons



2. 6 protons and 5 electrons



Compute the charge of the following ions. Show your solution.


1. Anion with a charge of -3



2. Cation with a charge of +2



3. Anion with a charge of +5



i. On January 3, 2011 Gadi computer service business by investing birr 100,000 cash and equipment having birr 60,00 market value



ii. On January 6,2011 purchased office furniture on account for birr 400



iii. On January 9, 2011 purchased office furniture is purchase for birr 350 cash



iv. On January 15, 2011 paid birr 500 as partial settlement of January 3, 2009 borrowing



v. On January 21, 2011 received birr 150 from sale of old office furniture.



Q.1 Prove by contrapositive that if n = a*b, where a and b are positive integers, then

a ≤ √n or b ≤ √n


A stone is thrown upward from the top of a building at an angle of 30.0° to the


horizontal and with an initial speed of 20.0 m/s. The point of release is 45.0 m above the


ground.


a. How long does it take to hit the ground?


b. Find the stone’s speed impact.


c. Find the horizontal range of the stone.

A stone is thrown upward from the top of a building at an angle of 30.0° to the


horizontal and with an initial speed of 20.0 m/s. The point of release is 45.0 m above the


ground.


a. How long does it take to hit the ground?


b. Find the stone’s speed impact.


c. Find the horizontal range of the stone.

a computer software retailer used a markup rate of 30.find the selling price of a computer game that cost the retailer $35


work done on the steady flow system is 30 kJ/kgm. Calculate the heat in HP 

if the mass flow rate of fluid is 10 kg per minute given that the internal energy 

is decreased by 10 kJ/kgm and the fluid flow is increased by 20 kJ/kgm. Also, 

identify if the heat is added to the system or rejected by the system


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