230/8= 28.75
28.75x 7= 201.25
201.25 calories come from fat.
Here are the solutions. See the attachment. I've color-coded for clarity.
Answer:
Step-by-step explanation:
![\frac{a}{b} =\frac{c}{d}](https://tex.z-dn.net/?f=%5Cfrac%7Ba%7D%7Bb%7D%20%3D%5Cfrac%7Bc%7D%7Bd%7D)
another way to write the equality of the two ratios is :
a : b = c : d
as you can see in the equality a : b = c : d
- a and d are extremes
- b and c are means
Answer:
22.4 litres
Step-by-step explanation:
Reaction:
2Mg (s) + O2 (g) → 2 MgO (s)
From the reaction, we know that 2 moles of Mg (s) react with 1 mol of O2
STP conditions mean:
- absolute temperature of 273.15 K
- absolute pressure of 1 atm
Using the equation of state for ideal gases:
PV = nRT
where P is the absolute pressure, T is the absolute temperature, n are the moles, V is the volume, and R is the gas constant = 0.082 atm*L/(mol*K). Solving for V and replacing:
V = nRT/P
V = 1*0.082*273.15/1
V = 22.4 litres
Answer:
the answer and steps are pictured above