Answer: 7.622g of sulphuric acid
Explanation:
3H2SO4 + 2Al -> Al2(SO4)3 + 3H2
3 moles of H2SO4 needs 2 moles of Al
(3 x 98)g of H2SO4 needs (2 x 27)g of Al
294g of H2SO4 needs 54g of Al
29400mg of H2SO4 needs 5400mg of Al
1mg of Al = 294/54 = 5.44mg of Al
140.11mg of Al = 140.11 x 5.44
= 762.2mg = 762.2/100 = 7.622gof sulphuric acid
Answer:
The volume is 8,0 L.
Explanation:
We apply Boyle Mariotte's Law: for a given mass of gas at constant temperature, its pressure and volume vary inversely proportionally (the higher the pressure, the lower the volume and vice versa):
P1 x V1 = P2 xV2
V2 = (P1 x V1)/P2
V2 = ( 0,80 atm x 4,0 L)/ 0,40 atm
<em>V2= 8,0 L</em>
Answer:
221.7 K
Explanation:
As, PV = nRT
Hence,
6.5 (14) = 5(0.0821)T
91 = 0.4105 T
91 ÷ 0.4105 = T
221.7 = T
Hence the required temperature is <u>221.7 K (Ans)</u>
The periodic table is organized in such a way that they provide a great deal of information about elements and how they are related to each other.
Explanation:
The periodic table is used for better understanding of patterns and relationships between elements. With the elements arranged in the periodic table allow us to make synthetic elements.
This periodic table helped scientist to discover the elements that are needed for humans to survive. For example plants and animals need elements to grow and chlorine helps animals to digest food and in humans iron helps to carry oxygen around body and chlorine that convert the sun energy to food.
It provides information about elements and how they are related to each other in easy method. They are used to predict the properties of elements.
Thus, the Changes in periodic table is from the creation of new chemical elements and it helps the society in various applications that are used in mining, engineering and other occupations.
Answer:
(of liquids) not forming a homogeneous mixture when added together.
Explanation:
