Answer:

Explanation:
Hello,
In this case, since the density is computed via the division of the mass by the volume:

For the given mass of 54 g and volume of 6 mL, the density turns out:

Best regards.
<span>Anthracite is also referred to as hard coal because it is so hard and pure. It is very hard and highly compacted with variety of coal that has submetallic luster. It has highest carbon content, the lowest impurities, and highest density of energy of all the coal deposits.</span>
Answer:
P_2 =0.51 atm
Explanation:
Given that:
Volume (V1) = 2.50 L
Temperature (T1) = 298 K
Volume (V2) = 4.50 L
at standard temperature and pressure;
Pressure (P1) = 1 atm
Temperature (T2) = 273 K
Pressure P2 = ??
Using combined gas law:




Answer:
it should be B. earths core is composed of iron and nickel, if not let me know.