Here are the balanced equations
- C_2H_5OH+3O_2--->2CO_2+3H_2O+Energy
- 2AgCl-->2Ag+Cl_2
- AgNO_3+Zn--->Ag+ZnNO_3
- 3BaCl_2+Al_2(SO_4)_3--->3BaSO_4+2AlCl_3
- H_2+I_2--->2HI
Done!
The food raises the temperature of the calorimeter by 1.29 °C. The amount of calorie produced by the combustion would be: 1.29°C * <span> 6.15 kJ/°C= 7.9335 kJ.
If the food weight is </span>0.521g, then the food value would be:
7.9335 kJ/ 0.521g / (4.184kcal/kJ) =
(15.227 kJ/g) / (4.184kcal/kJ)= 3.64 kilo calorie/gram
Answer: D: y - 1 = (3/2) (x + 3)
Explanation:
The very first thing that needs to be done is to calculate the slope of the line shown, as we have to points, we can do it following the equation:
m=(y2 - y1)/(x2 - x1)
We know that the x1,y1 couple is (2,2) and the x2,y2 couple is (-2,-4), then we replace the values on the equation and we have:
m=(-4 - 2)/(-2 - 2) = -6/-4, then we simplify the result and we have 3/2.
We already have the slope of the equation, we are just missing the units that the line is moved to the left. We know that the equation must follow the form y = mx + b, and we already know m, we are missing b on both equations, but, as the line drawn is passing by (0,-1), or the origin, we know that b for that equation is -1. So the equation for that line is:
y = (3/2)x - 1
And the only answer that has the same slope is D.
