H2N ОН IZ

How do the percent compositions for A C₂H6 and 48 compare? CH 36 C 48 has a higher percentage of carbon than C3H6. B CH CH C.Hs has a higher percentage of hydrogen than 36. C They are the same. D The percent compositions cannot be determined.

The mass in grams of 2.0x10-2 moles of C6H12O6

1. How many grams of Fe" are present in 3.42 grams of iron(II) sulfide? grams Fe2+. 2. How many grams of iron(II) sulfide contain 1.55 grams of Fe2*? grams iron(II) sulfide.

How many molecules are in 119.78 g of butane (C4H10)?

Which weighs less, 0.25 mole of xenon atoms or 2.0 moles of carbon atoms?

12 of 3 What amount of CUSO4•5H,O, in moles, does this mass represent? mass = 1.787 g X mol resubmit Incorre The molar mass of CuSO4 5H,O is 249.69 g/mol.

The amounts of two elements X and Y in three samples of an unknown substance are as follows: 10.0 g X and 10.0 g Y in Sample 1 18.0 g X and 12.0 g Y in Sample 2 6.0 g X and 2.0 g Y in Sample 3 What is this substance? Hint: Compare the percentages of Y (or X) in each sample. Are these percentages of Y the same or different? I will say that in sample 1 the percentage of Y is 50 %. likely a mixture likely a compound likely an element either a compound or an element, but cannot be a mixture

If you have a 25% Ca in calcium fluoride, what is the mass of Ca if you have 2.40 g of calcium fluoride?

Calculate the following, with proper number of significant figures: Molar mass of Al(CH3COO)3 is  ____________ g/mol In 16.4 moles of Al(CH3COO)3 … … the number of grams of Al(CH3COO)3 is ____________ g … the count of Al(CH3COO)3 units is ____________ … the number of moles of 6C atoms is ____________ mol … the count of 6C atoms is ____________ … the mass of 6C atoms is ____________ g The % mass fraction of 6C atoms in Al(CH3COO)3 is ____________% The % mass fraction of Al atoms in Al(CH3COO)3 is ____________% Name the compound: ____________