Looking closely, reading every detail
Answer:
1. 505g is the mass of the aluminium.
2. The answer is in the explanation
Explanation:
1. To solve this question we need to find the volume of the rectangle. With the volume and density we can find the mass of the solid:
Volume = 7.45cm*4.78cm*5.25cm
Volume = 187cm³
Mass:
187cm³ * (2.702g/cm³) = 505g is the mass of the aluminium
2. When the temperature of a liquid increases, the volume increases doing the density decreases because density is inversely proportional to volume. And works in the same way for gases because the temperature produce more collisions and the increasing in volume.
Answer:
All the carbon atoms in the human body were created in the stars. Elementary particles, such as protons, were formed during the "big bang"; that amazing moment about 14 billion years ago in which the universe got it's start.
The percent composition of Uranium in U308 = C. 81.03%
<h3>Further explanation</h3>
Given
X g of U
3.795 g of O
20.00 g of U308
Required
The percent composition of Uranium
Solution
mass of Uranium in U308 :
= mass of U308 - mass of O
= 20 g - 3.795 g
= 16.205 g
The percent composition :
%U = (mass U/mass U308) x 100%
%U= (16.205/20) x 100%
%U = 81.025≈81.03
