a) Write the electronic configuration of 3sBr b) Indicate # ofelectrons in each

Question

a) Write the electronic configuration of 3sBr b) Indicate # ofelectrons in each of the followings: 16S2 Br 1. 13 2. a) Calculate the molar mass of (NH4)3 P04 b) If7.21 g of KCl is dissolved in enough water to prepare 0.33 L of solution, what is the molarity? What are the compositions of elements in Cosmic rays from the Sun? Write a nuclear reaction for cosmic rays, in earth's upper atmospher c nuclei and a proton 3. a) e, which generates , a) If a machine does 4.8x10 kj of work after an input of 7.31x1o kj of heat, what is the change in internal energy for the machine? b) In the combustion of methane (CHa): CHs (gas)+202 (gs)-CO2 (eas) 21H20 (gas): How many moles of oxygen are required it 16 moles CHa) is completely consumed. Show the calculation

Explanation / Answer

Ans 4 b)

one mole of methane gas consumes 2 moles of oxygen gas , according to the balanced reaction.

So 16 moles of CH4 will require : 16 x 2

= 32 moles of oxygen gas

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