4.8 g/cm3 with sig figs since it's mass/volume you divide 76 grams by 16 cm3
Answer:
20.5 atm
Explanation:
First, let's calculated the volume of the air tank. For a sphere, the volume is
V = (4/3)xπr³, where r is the radius.
The diamenter given is 78 cm, so r = 78/2 = 39cm, then:
V = (4/3)xπx39³
V = 248,474.84 cm³
Knowing that 1 cm³ = 0.001 L, V = 248.5 L
The gas will reduce its volume, but the temperature will not change, so we can use the Boyle equation for isothermic transformation:
P1V1 = P2V2, supposing that in the initial state the gas is in 1 atm
1x5100 = P2x248.5
P2 = 5100/248.5
P2 = 20.5 atm (3 significant digits)
Answer:
6.0 x 10^-1 g Fe
Explanation:
I might be in the wrong but hear me out:
Convert 0.85 g to mols of Fe2O3.
0.85 g x 1 mol/159.69=0.0053 mols Fe2O3.
Get moles of Fe (iron metal).
0.0053 mols Fe2O3 x 2 mol Fe/ 1 mol Fe2O3
= 1.0 x 10^-2 mols Fe
Convert moles to grams of Fe.
1.0 x 10^-2 mols of Fe x 55.85 grams Fe/ 1 mol Fe
= 6.0 x 10^-1
There should be only one sig fig. Hoped this helped.
Acetic acid is 60.05 grams/mole. In 1 liter of vinegar or 1000 ml there would be 0.046% of acetic acid = 46 ml x 1.005g/ml = 46.23 grams/60.05 grams= 0.77 moles per litre of vinegar.This then would be the concentration of acetic acid in for example 1 liter of vinegar.
Answer:
C) is correct answer . <em /><em />