5. A penny weighs about 2.5 g. How many moles of pennies would be required to equal the mass of the moon (7.3x10^24 kg)

6. Vodka is 40% ethanol. How many moles of ethanol are in a 750 ml bottle of vodka? The density of Ethanol is 0.79 g/ml.

5. 1.16 x moles  moles of pennies would be required to equal the mass of the moon.

6. 12.86 moles of ethanol are in a 750 ml bottle of vodka.

Explanation:

5 .Data given:

mass of penny = 2.5 grams

atomic mass of penny = 62.93 grams/mole

moles present in mass of the moon given as = 7.3 x kg

number of moles =

number of moles =

0.039 moles of penny is present in 2.5 grams

0.039 moles of penny in 2.5 grams of it

so, x moles in 7.3 X  grams

x = 1.16 x moles

so when the mass of the penny given is equal to the mass of moon, number of moles of penny present is 1.1 x .

6.

Given:

vodka = 40% ethanol

volume of vodka bottle = 750 ml

moles of ethanol =?

density of ethanol =0.79 g/ml

atomic mass of ethanol = 46.07 grams/mole

so, from the density of ethanol given we can calculate how much ethanol is present in the solution.

density =

density x volume = mass

0.79 x 750 = 592.5 grams

number of moles =

number of moles of ethanol =

                                               = 12.86 moles of ethanol

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be