Answer:
Chemical processes can be types of biological processes.
Chemical substances can be found in the bloodstream.
Chemical processes work to maintain homeostasis.
Explanation:
The listed three choices are true statements about chemical processes. Chemical processes brings about chemical change and they occur in biological organisms.
Some examples of chemical processes in organisms is metabolism of food.
Also, chemical processes can help regulate the internal environment of an organism. It is known that chemical reactions at certain times acts a thermoregulators in the body.
Examples of chemical substances in the body are glucose, amino acid, proteins etc.
<em>An example of a</em><em>n</em><em> </em><em><u>exothermic</u></em><em> </em><em>reaction is when metals react with oxygen to form metal</em><em> </em><em><u>Oxides</u></em>
<em><u>Hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em>helped you- have a good day bro cya)
Answer: 1.67 kg
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q = Heat absorbed=
=
(1kJ=1000J)
m= mass of substance = ?
c = specific heat capacity = 
Change in temperature ,
Putting in the values, we get:

(1kg=1000g)
Thus the mass (in kg) of the copper sample is 1.67