Answer:
Find the molar mass of all the elements in the compound in grams per mole.
Find the molecular mass of the entire compound.
Divide the component's molar mass by the entire molecular mass.
You will now have a number between 0 and 1. Multiply it by 100% to get percent composition.
Explanation:
Aniline has smallest Rf value on silica gel since it is more polarthan the other compounds because aniline is a hydrogen donor and acceptor itmakes the molecule more attracted to the silica gel which is also also polar as<span>‘likes dissolve likes.’</span>
In photograph a, a coil of zinc metal is in a solution of sulfuric acid. In photograph b, a yellow solution of sodium chromate is being added to a colorless solution of silver nitrate. What clues in the photographs indicate that a chemical change is probably occurring.
In photograph a, chemical change is occuring as when a coil of zinc metal is in a solution of sulfuric acid, then the solution starts bubbling, that indicates a chemical change.
In photograph b, a yellow solution of sodium chromate is being added to a colorless solution of silver nitrate, that changes the color of the solution to red , that indicates a chemical change.
Answer:
The 264.61 g food will contain 2150 calories.
Explanation:
Given data:
mass of food = 16 g
calories in 16 g of food = 130 cal
grams of 2150 calories = ?
Solution:
we will solve this problem by cross multiplying.
16 g/ 130 cal = x/2150 cal
x = (16 g/130 cal) × 2150 cal
x = 0.123 g × 2150
x= 264.61 g
so the 264.61 g food will contain 2150 calories.