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A 24.3g sample of a compoud XO2 contains 3.365 x 10^23 oxygen atoms. Determine the molar mass in g/mol of the element X. Show your work.

A solid sample of a hydrate salt, NaNO3xH2O, was heated gently to drive off all the water of crystallization. Starting with a mass of 7.494g of NaNO3xH2O, a mass of 5.263g of the anhydrous salt, NaNO3 was obtained. Determine the value of x (which is expec...

Frances wanted to prepare a 0.0285M standard solution of LiCl. She weighed out 27.5g of solid LiCl. She had plenty of water available. What volume of the solution was she able to prepare?

How many moles are in 27.5 grams of LiCl? Show all work!

Well first of all you need to figure out the sales tax for one bike and one scooter .With the sales tax taken into consideration, one bike would cost $17.36. One scooter would cost $179.20. Then you need to figure out how much it would cost for 5 bikes an...

I could I just forgot the equation. Sorry...

Thank you so much for your help. Once I got the formula to convert grams to moles, this was a lot of help. But could you check my work for me? I converted the grams to moles and got 0.648737909 mol LiCl. Then I divided that by 0.0285M and got 22.76273365...

Thank you so much for this. This question confused me so much. Just one thing. Could you check my work for me? 3.365x10^23/6.022x10^23 atoms = 0.558784457 mol XO2 0.558784457 mol XO2/2 = 0.27939228mol O2 grams O2 = 0.27939228 mol O2*32.00 = 8.94055296gO2...

Oh and yes I do think that this could be MnO2.

Alright I have one more question. Mol X is 0.279 right?

I'm almost 100% sure it is.