Suppose that you were given the job of shipping 25,000 hex nuts to a customer. How many boxes of hex nuts would this be? All you have is a hanging scale and a barrel of hex nuts. Describe how you could determine the proper number of pieces without physically counting them out

Question:

Suppose that you were given the job of shipping 25000 hex nuts to a customer. How many boxes of hex nuts would this be? All you have is a hanging scale and a barrel of hex nuts. Describe how you could determine the proper number of pieces without physically counting them out. [info: 8.77 boxes of hex nuts per kg, 114 grams of hex nuts per box, 28.4 grams of hex nuts, and the average mass of one piece of a hex nut is 1.14 grams]

Number of hex nuts per box = 100 pieces of hex nuts

25,000 hex nuts = 2500 boxes

Explanation:

Here, we have 1 kg of hex nuts = 8.77 boxes

114 grams of hex nuts = 1 box

1.14 grams = 1 hex nut

Therefore

25,000 hex nuts weighs 25000 × 114 = 28500 grams = 28.5 kg

1 kg = 8.77 boxes

1 box of hex nuts weighs 1000/8.77 = 114.025 grams

Since one hex nut weighs 1.14 grams, therefore, there are

114.025/1.14 = 100.022 ≈ 100 hex nuts per box

Therefore, 2850 kg = 8.77 boxes/kg × 28.5 kg = 249.945 boxes ≈ 250 boxes.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :