Answer:
Statment 2
Explanation:
This is just an educated guess
Answer:
no
Explanation:
protons and electrons are equal to atomic number
Answer: C. They must have the same average kinetic energy.
Explanation: I got it right
Variables within an experiment many be altered in order to produce specific outcomes such as a reaction rate. The reaction rate is a measure of how fast a chemical reaction can happen. The increase in temperature increases the collision of molecules, such as the solid sugar solute and and the water molecules, which act as a solvent. Agitation, such as stirring, also increases the solubility by increasing collisions.
This continues until the solution becomes too saturated.
To determine the empirical formula of the compound given, we need to determine the ratio of each element in the compound. To do that, we need to know the amount of carbon, hydrogen and oxygen atoms in the compound. We determine these from the given amounts of the products after burning.
Given:
2.5 g vanillin
5.79 g CO2
1.18 g H2O
Solution:
mol C = 5.79 g CO2 ( 1 mol CO2 / 44.01 g CO2) ( 1 mol C / 1 mol CO2) = 0.132 mol C
mol H = 1.18 g H2O ( 1 mol g H2O / 18.02 g H2O) ( 2 mol H / 1 mol H2O) = 0.131 mol H
We convert them into grams,
0.132 mol C (12.01 g / 1 mol) = 1.59 g
0.131 mol H (1.01 g / 1 mol) = 0.132 g
mass of C and H in vanillin = 1.722 g
mass of O = 2.5 - 1.722 = 0.778 g O
mol O = 0.778 g O ( 1 mol O / 16 g ) = 0.049 mol O
Dividing the number of moles of each element with the smallest value of number of mole, we will have the empirical formula:
moles ratio
C 0.132 / 0.049 2.69 x 3 = 8
H 0.131 / 0.049 2.67 x 3 = 8
O 0.049 / 0.049 1 x 3 = 3
The empirical formula would be C8H8O3.
