Small crystals
<span>white, brown </span>
<span>hard as in solid at room temp </span>
<span>sweet </span>
The % composition of each element is calculated as follows
= mass of the element/total mass x100
total mass= 73.5+4.2+72.3=150
% composition of C = 73.5/150 x100=49%
% composition of H= 4.2/150 x100= 2.8%
%composition of Cl= 72.3/150 x100= 48.2%
Mole ratios<span> are important because mole ratios allow you change moles of a substance to moles of another substance.</span>
180.189 g was the mass of the zinc sample with a specific heat of zinc is 0.390 j/g°C.
<h3>What is specific heat capacity?</h3>
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
Using specific heat capacity formula here:
× 
× Δ
= 
× 
× Δ
0.390J/g°C × ×77.4ºC = 4.184J/g°C× 65.0g × 20.00ºC.
= 180.189 g
Hence, 180.189 g was the mass of the zinc sample.
Learn more about the specific heat capacity here:
brainly.com/question/19339241
#SPJ1
Answer:
= 3,702.816 Joules
Explanation:
Heat absorbed by water is equivalent to heat released by copper.
Heat absorbed is given by:
Q = mcΔT
where m is the mass, c is the specific capacity and ΔT is the change in temperature.
Mass = 1248 g
ΔT = 45°C - 22°C = 23°C
c = 0.129j/g°c
Heat = 1248 g × 23°C × 0.129j/g°C
<u>= 3,702.816 Joules</u>
