There are no zeros, so all three digits<span> are significant.</span>
<span>b. 3440.</span>
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)
Two compound samples are composed of the same elements but in different proportion, it means the two samples are two different compounds.
Because there are many compound which consist of same elements. for example water and hydrogen peroxide are two different compounds but these compounds consist if same elements, hydrogen and oxygen;
H₂O consist of hydrogen and oxygen and it is water
H₂O₂ also consist of hydrogen and oxygen but it is hydrogen peroxide
So, both are different compounds
In H4SiO4, the mole ratio of carbon to hydrogen to oxygen is the same as described in the question. Therefore H4SiO4 is the empirical formula
I hope this helps you!!