In chemical changes new substances are formed and the process is often difficult to reverse. During chemical changes particles do change with atoms or ions regrouping. Bonds between atoms break and new ones form and energy is either given out or taken in. Some chemical changes are initiated by mixing
<u>Answer:</u> The volume of the gas when the pressure and temperature has changed is 0.811 L
<u>Explanation:</u>
To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.
The equation follows:

where,
are the initial pressure, volume and temperature of the gas
are the final pressure, volume and temperature of the gas
We are given:
Conversion factor used:
1 L = 1000 mL
1 atm = 760 mmHg
![P_1=1.00atm=760mmHg\\V_1=790mL=0.790L\\T_1=37^oC=[37+273]K=310K\\P_2=695mmHg\\V_2=?L\\T_2=18^oC=[18+273]K=291K](https://tex.z-dn.net/?f=P_1%3D1.00atm%3D760mmHg%5C%5CV_1%3D790mL%3D0.790L%5C%5CT_1%3D37%5EoC%3D%5B37%2B273%5DK%3D310K%5C%5CP_2%3D695mmHg%5C%5CV_2%3D%3FL%5C%5CT_2%3D18%5EoC%3D%5B18%2B273%5DK%3D291K)
Putting values in above equation, we get:

Hence, the volume of the gas when the pressure and temperature has changed is 0.811 L
Answer: I think it’s compounds only
Explanation:
Answer: light, chlorophyll,
Explanation:
Light energy drives the synthesis of carbohydrates from corbondioxide and water with the generation of oxygen. Meanwhile chlorophyll helps in the capturing of this light energy.