1. A collection of atoms, molecules, or ions that contains Avogadro's number of these items is called what?
2. The initial substances that undergo change in chemical reaction are called what?
3. The law that states that atoms are neither created nor destroyed in a chemical reaction, but may be rearranged, is called what?
4. The mass of one mole of an element or compound (Also equal to the formula weight expressed in grams) is called what?
5. Which elements contain Avogadro's number of atoms per mole?
Calculate the formula weight of the following compounds"
6. Potassium hydroxide
7. HNO3

The main thrust of these questions deal with the fundamentals of chemical equations and corresponding atomic weights to physical amounts. This information is typically used to determine how much reactants are needed in what proportions to yield a necessary amount of products. You've clearly got the correct answers for problems 1-4.
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<br>Number 5 asks which elements would have a mole of atoms per ...

Solution Summary

It deals with the fundamentals of chemical equations and corresponding atomic weights to physical amounts.

... of the reaction, Na+1/2Cl2-->NaCl, is 98.3 kcal/mole. ... is the heat given off when 2 moles of NaCl ... 1) How to calculate the formula weight of several compounds. ...

... are mixed together and react according to the following equation. ... this amount completely we will need 0.250 moles of aluminum (for each mole of Fe2O3 ...

... a molecular weight of oxygen (O) equal to 16.00 g/mole: {convert 3 ...moles copper) / (moles of oxygen ... to this molar ratio, what is the empirical formula of copper ...

... calculate the mass of CS2 using the formula, Density = mass ... Step 3: Calculate the moles of CS2 , using the mass ... of CS2 (calculated on Step 2). Mole = Mass in ...

Hydrate Formula and Gravimetric of Cloride. 1. Given that moles of water loss = Weight of water / GMW H2O (=18.051 ) and moles of CuSO4 = final weight/ GMW ...

... or x= 2.043079084. Putting this value of x in Equation 1 gives n=0.00229/(1+x)= 0.000753. ... No of moles in the mixture Molecular weight Mass in the mixture ...

... The formula weight of boric acid is 61.83, how many grams are needed to make 100mL of 0.6M solution? Describe how you will make the solution. Computation: Mole...

... P1V1 P2V2 Use Ideal Gas Equation to find volume at STP: = T1 T2 ... V2 = 266.37 ml = 308 273 But at STP, 22400 ml = 1 mole. ... Therefore, 266.37 ml = 0.011892 moles. ...

... CuSO2 = 63.5 + 32 + 16*4 = 159.5 grams/mole Number of moles of salt = 3.196/ 159.5 = 0.02 moles. ... your calculations, what is the empirical formula of copper ...