Answer:
Q = 217.63J
Explanation:
Data;
Mass = 34.5g
T1 = 26.4°C
T2 = 75.3°C
c = 0.129J/g°C
Energy (Q) = mc(T2 - T1)
Q = 34.5 * 0.129 *(75.3 - 26.4)
Q = 4.4505 * 48.9
Q = 217.629J
The heat gained was 217.63J
water is a pure substance because it only contains one type of molecule.
Radiocarbon dating can be used to determine the age of a sample less than 50,000 years old - C
80.04 gram
mass = moles × relative formula mass
= 0.58×138
= 80.04
