Answer:
0.2298kg of Al
Explanation:
From the equation of reaction
3 moles of Al (81g) is required to mix with 3 moles of NH4ClO4 (352.5g)
Mass of Al required in the fuel mixture for every kilogram (1000g) of NH4ClO4 = 1000×81/352.5 = 229.8g = 229.8/1000 = 0.2298kg
Density is defined as the ratio of mass and volume. The formula of density is:
-(1)
Density of milk = 
(given)
Volume of milk = 
(given)
Substituting the values in formula (1):
Hence, the mass of the milk is 
.
Answer:
B
Explanation:
Hook's law describe the elasticity of something
Answer:
The answer to your question is: letter D
Explanation:
Data
Isotope mass 1 = 54 amu
Isotope mass 2 = 56 amu
Atomic weight = 54.37 amu
Percent abundance of isotope 2 = ? = X
Percent abundance of isotope 1 = 1 - x
Formula
Atomic weight = (Mass isotope 1)(1 - x) + (mass isotope 2)(x)
Process
Place the data in the formula and solve for x.
54.37 = 54( 1 - x) + 56x
54.37 = 54 - 54x + 56x
54.37 - 54 = -54x + 56x
0.37 = 2x
x = 0.37 / 2
x = 0.185
To find the percent multiply by 100
x = 0.185 x 100
x = 18.5 % = Mass of isotope 2
Mass of isotope 1 = 100 - 18.5 = 81.5 %
